What is Packed BCD Format ?
Posted in Microprocessors Interview Questions
Packed BCD Format : Packed BCD Numbers are stored in two digits to a byte , in 4 bit groups referred to as nibbles. ALU is capable of performing only binary addition and subtraction , but by adjusting the sum or difference the correct result in packed BCD format.
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Thursday, February 26, 2009
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What is difference between DIV and IDIV instruction in 8086 ?
Posted in Microprocessors Interview Questions
DIV : It operates only on unsigned number.IDIV : It operates only on signed numbers.
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Posted in Microprocessors Interview Questions
DIV : It operates only on unsigned number.IDIV : It operates only on signed numbers.
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What is the difference between 8086 and 8088? 10.01.09
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Write about the following instruction :
Posted in Microprocessors Interview Questions
MOV CS:[BX], DLMOV CS:[BX],DL - It copies a byte from DL Register. Effective Address for the memory location is contained in the BX Register. Normally an effective address in BX will be added to the data segment base in DS to produce the physical memory address. In this instruction CS: indicates that we want the BIU to add the effective address to the code segment base in CS to produce the physical address.
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Posted in Microprocessors Interview Questions
MOV CS:[BX], DLMOV CS:[BX],DL - It copies a byte from DL Register. Effective Address for the memory location is contained in the BX Register. Normally an effective address in BX will be added to the data segment base in DS to produce the physical memory address. In this instruction CS: indicates that we want the BIU to add the effective address to the code segment base in CS to produce the physical address.
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What is Programmed I/O ?
Posted in Microprocessors Interview Questions
Programmed I/O : It consists of continually examining the status of an Interface and performing an I/O operation with the Interface when its status indicates that it has data to be input or its data- out buffer register is ready to receive data from the CPU.
.
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Programmed I/O : It consists of continually examining the status of an Interface and performing an I/O operation with the Interface when its status indicates that it has data to be input or its data- out buffer register is ready to receive data from the CPU.
.
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What is the use of Directives in 8086 ?
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Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction.
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Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction.
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← What is Programmed I/O ?
What is AAS instruction in 8086 ? →
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What is AAS instruction in 8086 ?
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Adjust Result of ASCII SubtractionThis instruction adjust the binary result of SUB or SBB instruction.
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Adjust Result of ASCII SubtractionThis instruction adjust the binary result of SUB or SBB instruction.
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What is Unpacked BCD Format ?
Posted in Microprocessors Interview Questions
Unpacked BCD Format : In Unpacked BCD, there is only one digit per byte and because of this,unpacked multiplication and division can be done. Binary operations act on signle bytes and the results are adjusted. For Division , the adjustment is done before the binary division.
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Define Segment Override Prefix. →
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Unpacked BCD Format : In Unpacked BCD, there is only one digit per byte and because of this,unpacked multiplication and division can be done. Binary operations act on signle bytes and the results are adjusted. For Division , the adjustment is done before the binary division.
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Define Segment Override Prefix.
Posted in Microprocessors Interview Questions
Segment Override Prefix : To permit exceptions to the Segment Register usage, a special one byte instruction called a segment override prefix is available . It is of the form :
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Use the override modifier to modify a method, a property, an indexer, or an event. An override method provides a new implementation of a member inherited from a...
What is a Data Segment ? 12.03.06
Each Non-clustered table has a data segment. All of the table's data is stored in the extents of its data segment. Each Eluster has a data segment. The®..
Posted in Microprocessors Interview Questions
Segment Override Prefix : To permit exceptions to the Segment Register usage, a special one byte instruction called a segment override prefix is available . It is of the form :
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Write the difference between CBW and CWD instruction in 8086. →
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What are the different type of Segments ? 15.01.09
Data Segment, Index Segment, Rollback Segment and Temporary Segment....
Parenthesis are never needed in prefix or postfix expressions. Why? 27.11.08
Basically Parenthesis indicate the operations which need to be carried out first ie according to the BODMAS rule..SO in case of postfix or prefix expression th...
Define Intra segment direct addressing mode: 14.11.08
The effective branch address is the sum of an 8- or 16 bit displacement and the current contents of IP....
List the branch related addressing mode: 14.11.08
Intra segment Direct Intra segment Indirect Inter segment Direct Inter Segment Indirect...
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It is the set of before image data blocks that contain rows that are modified by a transaction. Each Rollback Segment entry must be completed within one rollba...
How will you monitor rollback segment status? 23.05.08
Querying the DBA_ROLLBACK_SEGS view The status available as follows : IN USE - Rollback Segment is on-line AVAILABLE - Rollback Segment available bur not on-...
What are the different types of segments ? 05.05.08
Data segment, index segment, rollback segment and temporary segment....
How does DB2 store NULL physically ? 17.03.08
As an extra-byte prefix to the column value. Physically, the null prefix is Hex '00' if the value is present and Hex 'FF' if it is not....
What is Method Overriding? How to override a function in C#? 20.07.06
Use the override modifier to modify a method, a property, an indexer, or an event. An override method provides a new implementation of a member inherited from a...
What is a Data Segment ? 12.03.06
Each Non-clustered table has a data segment. All of the table's data is stored in the extents of its data segment. Each Eluster has a data segment. The®..
Related Interview Questions of part --5 of ---7
Write the difference between CBW and CWD instruction in 8086.
Posted in Microprocessors Interview Questions
CBW : Convert a byte to a word, sign extend AL Register into a AH Register.CWD : Convert a word to a double word ,sign extend the AX Register into the DX Register
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← Define Segment Override Prefix.
Write about the following instruction : LES CX, [3483H] →
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What is the difference between 8086 and 8088? 10.01.09
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
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A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
What is the use of TEST instruction in 8086? 14.11.08
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flag...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is the use of Instruction pointer in 8086 ? 14.11.08
Instruction pointer holds the 16 bit address of the next code byte within the code segment. The value contained in the IP is called effective address or offset....
What are the five stages in a DLX pipeline? 10.11.08
The instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operations...
What is the difference between 8086 and 8088? 10.11.08
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086. in 8086 instruction buffer q(ibq) is 6bytes a...
What are the five stages in a DLX pipeline? 03.11.08
he instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operati...
What is the difference between 8086 and 8088? 26.03.06
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
Posted in Microprocessors Interview Questions
CBW : Convert a byte to a word, sign extend AL Register into a AH Register.CWD : Convert a word to a double word ,sign extend the AX Register into the DX Register
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← Define Segment Override Prefix.
Write about the following instruction : LES CX, [3483H] →
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What is the difference between 8086 and 8088? 10.01.09
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
What is pipelining? 26.11.08
A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
What is the use of TEST instruction in 8086? 14.11.08
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flag...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is the use of Instruction pointer in 8086 ? 14.11.08
Instruction pointer holds the 16 bit address of the next code byte within the code segment. The value contained in the IP is called effective address or offset....
What are the five stages in a DLX pipeline? 10.11.08
The instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operations...
What is the difference between 8086 and 8088? 10.11.08
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086. in 8086 instruction buffer q(ibq) is 6bytes a...
What are the five stages in a DLX pipeline? 03.11.08
he instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operati...
What is the difference between 8086 and 8088? 26.03.06
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
Related Interview Questions of part --5 of --6
Write about the following instruction : LES CX, [3483H]
Posted in Microprocessors Interview Questions
Copy the contents of memory at the displacement of 3483H in DS to CL, contents of 3484H in DS to CH, and copy the contents of memory at displacement of 3485H and 3486H in DS to ES Register.
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← Write the difference between CBW and CWD instruction in 8086.
What is the use of D bit in opcode? →
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What are the five stages in a DLX pipeline? 26.11.08
Instruction Fetch Stage Instruction Decode Stage Instruction Execution Stage Memory Stage Write Back...
What are the stages of DLX pipelining ? 26.11.08
5 stages in DLX pipeling: 1. Instruction Fetch. 2. Instruction Decode. 3. Execute. 4. Memory Access and 5. Write Back....
Write about the following instruction : 14.11.08
Offset of the first instruction of procedure is in two memory addresses in DS. It replaces the contents of IP with contents of word memory locations in DS point...
What is the use of TEST instruction in 8086? 14.11.08
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flag...
How the execution time of an instruction is calculated? 14.11.08
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period....
Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is DAS instruction ? 14.11.08
DAS : Decimal Adjust After Subtraction This instruction converts the binary result of a SUB or SBB instruction in AL to Packed BCD format. It operates only on...
What are the five stages in a DLX pipeline? 10.11.08
The instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operations...
What are the five stages in a DLX pipeline? 03.11.08
he instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operati...
Posted in Microprocessors Interview Questions
Copy the contents of memory at the displacement of 3483H in DS to CL, contents of 3484H in DS to CH, and copy the contents of memory at displacement of 3485H and 3486H in DS to ES Register.
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← Write the difference between CBW and CWD instruction in 8086.
What is the use of D bit in opcode? →
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What are the five stages in a DLX pipeline? 26.11.08
Instruction Fetch Stage Instruction Decode Stage Instruction Execution Stage Memory Stage Write Back...
What are the stages of DLX pipelining ? 26.11.08
5 stages in DLX pipeling: 1. Instruction Fetch. 2. Instruction Decode. 3. Execute. 4. Memory Access and 5. Write Back....
Write about the following instruction : 14.11.08
Offset of the first instruction of procedure is in two memory addresses in DS. It replaces the contents of IP with contents of word memory locations in DS point...
What is the use of TEST instruction in 8086? 14.11.08
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flag...
How the execution time of an instruction is calculated? 14.11.08
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period....
Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is DAS instruction ? 14.11.08
DAS : Decimal Adjust After Subtraction This instruction converts the binary result of a SUB or SBB instruction in AL to Packed BCD format. It operates only on...
What are the five stages in a DLX pipeline? 10.11.08
The instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operations...
What are the five stages in a DLX pipeline? 03.11.08
he instruction sets can be differentiated by * Operand storage in the CPU * Number of explicit operands per instruction * Operand location * Operati...
Related Interview Questions of part---5 of ---5
What is the use of D bit in opcode?
Posted in Microprocessors Interview Questions
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination operand (D=1).
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← Write about the following instruction : LES CX, [3483H]
What is the use of V bit in opcode ? →
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Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is the use of V bit in opcode ? 14.11.08
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL regi...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
Posted in Microprocessors Interview Questions
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination operand (D=1).
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← Write about the following instruction : LES CX, [3483H]
What is the use of V bit in opcode ? →
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Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is the use of V bit in opcode ? 14.11.08
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL regi...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
Related Interview Questions of part ---5 of ---4
What is the use of V bit in opcode ?
Posted in Microprocessors Interview Questions
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL register contains the shift count.
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← What is the use of D bit in opcode?
Write the use of Z bit in opcode? →
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Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is the use of D bit in opcode? 14.11.08
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination o...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
Posted in Microprocessors Interview Questions
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL register contains the shift count.
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← What is the use of D bit in opcode?
Write the use of Z bit in opcode? →
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Write the use of Z bit in opcode? 14.11.08
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not mat...
What is the use of D bit in opcode? 14.11.08
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination o...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
Related Interview Questions of part --5 of ---3
Write the use of Z bit in opcode?
Posted in Microprocessors Interview Questions
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not match the Zero flag whichever occurs first.
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← What is the use of V bit in opcode ?
How the execution time of an instruction is calculated? →
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Write about your achievements ? 02.12.08
Your achievements during your last jobs communicate that this is what you did for your last employers and this is what you can do if they hire you. So, write yo...
What is the use of V bit in opcode ? 14.11.08
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL regi...
What is the use of D bit in opcode? 14.11.08
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination o...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write? 25.04.08
Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in...
C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write 16.04.08
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What is an asychronous write ? 03.04.08
It is a write to disk that may occur before or long after a commit. The write is controlled by the buffer manager....
What is the difference between Debug.Write and Trace.Write? 19.01.07
The Debug.Write call won't be compiled when the DEBUGsymbol is not defined (when doing a release build). Trace.Write calls will be compiled. Debug.Write is for...
Differentiate between functions read() and write(). 18.07.06
Functions read() and write() are used for reading and writing blocks of binary data to a file. Their prototypes are istream &read(unsigned char *buf, int num...
What is Write Command ? 21.06.06
The write command enables you to write an actual message on the other terminal online. You have to issue the write command with the login ID of the user with wh...
Posted in Microprocessors Interview Questions
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not match the Zero flag whichever occurs first.
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← What is the use of V bit in opcode ?
How the execution time of an instruction is calculated? →
Related Interview Questions
Write about your achievements ? 02.12.08
Your achievements during your last jobs communicate that this is what you did for your last employers and this is what you can do if they hire you. So, write yo...
What is the use of V bit in opcode ? 14.11.08
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL regi...
What is the use of D bit in opcode? 14.11.08
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination o...
What is the use of ‘W’ bit in opcode ?. 14.11.08
W bit in op-code : If an instruction in 8086 can operate on either a byte or a word , the op-code includes a W-bit which indicates whether a byte ( W =0 ) or a...
C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write? 25.04.08
Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in...
C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write 16.04.08
Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in...
What is an asychronous write ? 03.04.08
It is a write to disk that may occur before or long after a commit. The write is controlled by the buffer manager....
What is the difference between Debug.Write and Trace.Write? 19.01.07
The Debug.Write call won't be compiled when the DEBUGsymbol is not defined (when doing a release build). Trace.Write calls will be compiled. Debug.Write is for...
Differentiate between functions read() and write(). 18.07.06
Functions read() and write() are used for reading and writing blocks of binary data to a file. Their prototypes are istream &read(unsigned char *buf, int num...
What is Write Command ? 21.06.06
The write command enables you to write an actual message on the other terminal online. You have to issue the write command with the login ID of the user with wh...
Related Interview Questions of part --5 of ---2
Related Interview Questions of part --5 of ---2
How the execution time of an instruction is calculated?
Posted in Microprocessors Interview Questions
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period.
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← Write the use of Z bit in opcode?
Define EQU directive in 8086 assembly language? →
Related Interview Questions
What is Program counter? 10.01.09
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
What is a compiler? 26.11.08
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What are the five stages in a DLX pipeline? 26.11.08
Instruction Fetch Stage Instruction Decode Stage Instruction Execution Stage Memory Stage Write Back...
What is pipelining? 26.11.08
A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
Define XLAT instruction used in 8086. 14.11.08
It translates a byte in AL using a table in memory. The offset address is calculated by adding the 8 bit contents of the AL register and the contents of BX reg...
What is a compiler? 14.11.08
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What is Program counter? 19.07.06
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
What is a compiler? 10.07.06
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What are Pipelining Issues? 15.06.06
Pipelining increases the CPU instruction throughput - the number of instructions completed per unit of time. But it does not reduce the execution time of an ind...
What is Program counter? 17.03.06
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
How the execution time of an instruction is calculated?
Posted in Microprocessors Interview Questions
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period.
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← Write the use of Z bit in opcode?
Define EQU directive in 8086 assembly language? →
Related Interview Questions
What is Program counter? 10.01.09
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
What is a compiler? 26.11.08
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What are the five stages in a DLX pipeline? 26.11.08
Instruction Fetch Stage Instruction Decode Stage Instruction Execution Stage Memory Stage Write Back...
What is pipelining? 26.11.08
A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
Define XLAT instruction used in 8086. 14.11.08
It translates a byte in AL using a table in memory. The offset address is calculated by adding the 8 bit contents of the AL register and the contents of BX reg...
What is a compiler? 14.11.08
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What is Program counter? 19.07.06
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
What is a compiler? 10.07.06
Compiler is used to translate the high-level language program into machine code at a time. It doesn.t require special instruction to store in a memory, it store...
What are Pipelining Issues? 15.06.06
Pipelining increases the CPU instruction throughput - the number of instructions completed per unit of time. But it does not reduce the execution time of an ind...
What is Program counter? 17.03.06
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte i...
Related Interview Questions of part ---5 of ---------1
Related Interview Questions of part --5 of -------1
Define EQU directive in 8086 assembly language?
Posted in Microprocessors Interview Questions
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07H everytime that it finds the name corr in the program statement.
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← How the execution time of an instruction is calculated?
Write the use of Assume directive in 8086 assembly language using one example? →
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What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
How do you define a constant? 17.01.09
Via define() directive, like define ("MYCONSTANT", 100);...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Define EXTRN directive in in 8086 assembly language? 14.11.08
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module....
Write the use of Assume directive in 8086 assembly language using one example? 14.11.08
Assume CS: code_here, DS:data_here It tells the assembler that the logical segment code_here contains the instruction statements for the program and should be...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
How do you define a constant? 06.11.08
Via define() directive, like define ("MYCONSTANT", 100);...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific...
Define EQU directive in 8086 assembly language?
Posted in Microprocessors Interview Questions
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07H everytime that it finds the name corr in the program statement.
Post Your Answer!
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← How the execution time of an instruction is calculated?
Write the use of Assume directive in 8086 assembly language using one example? →
Related Interview Questions
What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
How do you define a constant? 17.01.09
Via define() directive, like define ("MYCONSTANT", 100);...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Define EXTRN directive in in 8086 assembly language? 14.11.08
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module....
Write the use of Assume directive in 8086 assembly language using one example? 14.11.08
Assume CS: code_here, DS:data_here It tells the assembler that the logical segment code_here contains the instruction statements for the program and should be...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
How do you define a constant? 06.11.08
Via define() directive, like define ("MYCONSTANT", 100);...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific...
‘Microprocessors Interview Questions’ -------Part ---5
Microprocessors Interview Questions’
Define EQU directive in 8086 assembly language?
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07H... Read more »
How the execution time of an instruction is calculated?
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period. Read more »
Write the use of Z bit in opcode?
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not match... Read more »
What is the use of V bit in opcode ?
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL register... Read more »
What is the use of D bit in opcode?
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination operand... Read more »
Write about the following instruction : LES CX, [3483H]
Copy the contents of memory at the displacement of 3483H in DS to CL, contents of 3484H in DS to CH, and copy the contents of memory at displacement of 3485H and... Read more »
Write the difference between CBW and CWD instruction in 8086.
CBW : Convert a byte to a word, sign extend AL Register into a AH Register. CWD : Convert a word to a double word ,sign extend the AX Register into the... Read more »
Define Segment Override Prefix.
Segment Override Prefix : To permit exceptions to the Segment Register usage, a special one byte instruction called a segment override prefix is available . It is... Read more »
What is Unpacked BCD Format ?
Unpacked BCD Format : In Unpacked BCD, there is only one digit per byte and because of this,unpacked multiplication and division can be done. Binary operations act... Read more »
What is AAS instruction in 8086 ?
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction. Read more »
What is the use of Directives in 8086 ?
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction. Read more »
What is Programmed I/O ?
Programmed I/O : It consists of continually examining the status of an Interface and performing an I/O operation with the Interface when its status indicates that... Read more »
Write about the following instruction :
MOV CS:[BX], DL MOV CS:[BX],DL - It copies a byte from DL Register. Effective Address for the memory location is contained in the BX Register. Normally an... Read more »
What is difference between DIV and IDIV instruction in 8086 ?
DIV : It operates only on unsigned number. IDIV : It operates only on signed numbers. Read more »
What is Packed BCD Format ?
Packed BCD Format : Packed BCD Numbers are stored in two digits to a byte , in 4 bit groups referred to as nibbles. ALU is capable of performing only binary addition... Read more »
Define EQU directive in 8086 assembly language?
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07H... Read more »
How the execution time of an instruction is calculated?
Execution time of an instruction can be determined by multiplying the number of clock pulses needed to execute the instruction by the clock period. Read more »
Write the use of Z bit in opcode?
It is used by REP instruction. Z bit helps to control the loop. It will be repeated the number of items indicated by the CX register or until Z bit dose not match... Read more »
What is the use of V bit in opcode ?
It is used by shift and rotate instructions to determine the number of shifts. V bit is set to 0 if the shift count is to be 1. V bit is set to 1 if the CL register... Read more »
What is the use of D bit in opcode?
D bit: It is used in double operand instruction. It is used to indicate whether the register specified by REG is the source operand (D=0) or the destination operand... Read more »
Write about the following instruction : LES CX, [3483H]
Copy the contents of memory at the displacement of 3483H in DS to CL, contents of 3484H in DS to CH, and copy the contents of memory at displacement of 3485H and... Read more »
Write the difference between CBW and CWD instruction in 8086.
CBW : Convert a byte to a word, sign extend AL Register into a AH Register. CWD : Convert a word to a double word ,sign extend the AX Register into the... Read more »
Define Segment Override Prefix.
Segment Override Prefix : To permit exceptions to the Segment Register usage, a special one byte instruction called a segment override prefix is available . It is... Read more »
What is Unpacked BCD Format ?
Unpacked BCD Format : In Unpacked BCD, there is only one digit per byte and because of this,unpacked multiplication and division can be done. Binary operations act... Read more »
What is AAS instruction in 8086 ?
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction. Read more »
What is the use of Directives in 8086 ?
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction. Read more »
What is Programmed I/O ?
Programmed I/O : It consists of continually examining the status of an Interface and performing an I/O operation with the Interface when its status indicates that... Read more »
Write about the following instruction :
MOV CS:[BX], DL MOV CS:[BX],DL - It copies a byte from DL Register. Effective Address for the memory location is contained in the BX Register. Normally an... Read more »
What is difference between DIV and IDIV instruction in 8086 ?
DIV : It operates only on unsigned number. IDIV : It operates only on signed numbers. Read more »
What is Packed BCD Format ?
Packed BCD Format : Packed BCD Numbers are stored in two digits to a byte , in 4 bit groups referred to as nibbles. ALU is capable of performing only binary addition... Read more »
Monday, February 23, 2009
Related Interview Questions of part --4 of ------16
Write the use of Assume directive in 8086 assembly language using one example?
Posted in Microprocessors Interview Questions
Assume CS: code_here, DS:data_hereIt tells the assembler that the logical segment code_here contains the instruction statements for the program and should be treated as a code segment. It also tells the assembler that it should treat the logical segment data_here as the data segment for this program.
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← Define EQU directive in 8086 assembly language?
Define EXTRN directive in in 8086 assembly language? →
Related Interview Questions
What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Define EXTRN directive in in 8086 assembly language? 14.11.08
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module....
Define EQU directive in 8086 assembly language? 14.11.08
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is manifest ? 11.11.08
A manifest contains assembly information (metadata of assembly) which includes assembly name(name,version,culture and public,private key),security info.,the fi...
Whats an assembly? 14.03.06
Assemblies are the building blocks of .NET Framework applications; they form the fundamental unit of deployment, version control, reuse, activation scoping, and...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific...
Posted in Microprocessors Interview Questions
Assume CS: code_here, DS:data_hereIt tells the assembler that the logical segment code_here contains the instruction statements for the program and should be treated as a code segment. It also tells the assembler that it should treat the logical segment data_here as the data segment for this program.
Post Your Answer!
Send This to a Friend
← Define EQU directive in 8086 assembly language?
Define EXTRN directive in in 8086 assembly language? →
Related Interview Questions
What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Define EXTRN directive in in 8086 assembly language? 14.11.08
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module....
Define EQU directive in 8086 assembly language? 14.11.08
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is manifest ? 11.11.08
A manifest contains assembly information (metadata of assembly) which includes assembly name(name,version,culture and public,private key),security info.,the fi...
Whats an assembly? 14.03.06
Assemblies are the building blocks of .NET Framework applications; they form the fundamental unit of deployment, version control, reuse, activation scoping, and...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific...
Related Interview Questions of part --4 of ---15
Define EXTRN directive in in 8086 assembly language?
Posted in Microprocessors Interview Questions
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module.
Post Your Answer!
Send This to a Friend
← Write the use of Assume directive in 8086 assembly language using one example?
What is Emulator? →
Related Interview Questions
What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
How do you define a constant? 17.01.09
Via define() directive, like define ("MYCONSTANT", 100);...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Write the use of Assume directive in 8086 assembly language using one example? 14.11.08
Assume CS: code_here, DS:data_here It tells the assembler that the logical segment code_here contains the instruction statements for the program and should be...
Define EQU directive in 8086 assembly language? 14.11.08
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
How do you define a constant? 06.11.08
Via define() directive, like define ("MYCONSTANT", 100);...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific
Posted in Microprocessors Interview Questions
The EXTRN directive is used to inform the assembler that the names or labels following the directive are in some other assembly module.
Post Your Answer!
Send This to a Friend
← Write the use of Assume directive in 8086 assembly language using one example?
What is Emulator? →
Related Interview Questions
What are Satellite Assemblies? 13.02.09
Satellite assemblies are user for localizing the applications resources.A satellite assembly is a DLL that contains only resource strings .we typically have one...
How do you define a constant? 17.01.09
Via define() directive, like define ("MYCONSTANT", 100);...
Write about EVEN directive in 8086 ALP. 14.11.08
It forces the address of the next byte to be even. 8086 words can be accessed in less time if they begin at even address....
Write the use of Assume directive in 8086 assembly language using one example? 14.11.08
Assume CS: code_here, DS:data_here It tells the assembler that the logical segment code_here contains the instruction statements for the program and should be...
Define EQU directive in 8086 assembly language? 14.11.08
It is used to assign a name to constants used in the programs. Consider the statement ‘corr EQU 07H’ , this would tell the assembler to insert the value 07...
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
How do you define a constant? 06.11.08
Via define() directive, like define ("MYCONSTANT", 100);...
What is global assembly cache? 14.03.06
Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores as...
What is Partial Assembly References? 14.03.06
Full Assembly reference: A full assembly reference includes the assembly's text name, version, culture, and public key token (if the assembly has a strong name)...
What are different types of directives in .NET? 14.03.06
@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files @Control:Defines control-specific
Related Interview Questions of part --4 of -- 14
What is Emulator?
Posted in Microprocessors Interview Questions
Emulator is a mixture of hardware and software .It is used to test and debug the hardware and software of an external system such as the prototype of a microprocessor based instrument.
Post Your Answer!
Send This to a Friend
← Define EXTRN directive in in 8086 assembly language?
What is the use of TEST instruction in 8086? →
Related Interview Questions
What is POSE? 22.03.07
Palm OS Emulator (POSE)....
What is Emulator? 28.02.07
A device, computer program, or system that accepts the same inputs and produces the same outputs as a given system....
What is a pseudo tty? 15.02.07
In Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without associated virtual console, computer terminal or serial port...
What are the mobile devices supported by .net platform? 16.01.07
The Microsoft .NET Compact Framework is designed to run on mobile devices such as mobile phones, Personal Digital Assistants (PDAs), and embedded devices. The e...
Posted in Microprocessors Interview Questions
Emulator is a mixture of hardware and software .It is used to test and debug the hardware and software of an external system such as the prototype of a microprocessor based instrument.
Post Your Answer!
Send This to a Friend
← Define EXTRN directive in in 8086 assembly language?
What is the use of TEST instruction in 8086? →
Related Interview Questions
What is POSE? 22.03.07
Palm OS Emulator (POSE)....
What is Emulator? 28.02.07
A device, computer program, or system that accepts the same inputs and produces the same outputs as a given system....
What is a pseudo tty? 15.02.07
In Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without associated virtual console, computer terminal or serial port...
What are the mobile devices supported by .net platform? 16.01.07
The Microsoft .NET Compact Framework is designed to run on mobile devices such as mobile phones, Personal Digital Assistants (PDAs), and embedded devices. The e...
Related Interview Questions of part ----4 of --------13
What is Emulator?
Posted in Microprocessors Interview Questions
Emulator is a mixture of hardware and software .It is used to test and debug the hardware and software of an external system such as the prototype of a microprocessor based instrument.
Post Your Answer!
Send This to a Friend
← Define EXTRN directive in in 8086 assembly language?
What is the use of TEST instruction in 8086? →
Related Interview Questions
What is POSE? 22.03.07
Palm OS Emulator (POSE)....
What is Emulator? 28.02.07
A device, computer program, or system that accepts the same inputs and produces the same outputs as a given system....
What is a pseudo tty? 15.02.07
In Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without associated virtual console, computer terminal or serial port...
What are the mobile devices supported by .net platform? 16.01.07
The Microsoft .NET Compact Framework is designed to run on mobile devices such as mobile phones, Personal Digital Assistants (PDAs), and embedded devices. The e...
Posted in Microprocessors Interview Questions
Emulator is a mixture of hardware and software .It is used to test and debug the hardware and software of an external system such as the prototype of a microprocessor based instrument.
Post Your Answer!
Send This to a Friend
← Define EXTRN directive in in 8086 assembly language?
What is the use of TEST instruction in 8086? →
Related Interview Questions
What is POSE? 22.03.07
Palm OS Emulator (POSE)....
What is Emulator? 28.02.07
A device, computer program, or system that accepts the same inputs and produces the same outputs as a given system....
What is a pseudo tty? 15.02.07
In Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without associated virtual console, computer terminal or serial port...
What are the mobile devices supported by .net platform? 16.01.07
The Microsoft .NET Compact Framework is designed to run on mobile devices such as mobile phones, Personal Digital Assistants (PDAs), and embedded devices. The e...
Related Interview Questions of part --4 of ---13
What is the use of TEST instruction in 8086?
Posted in Microprocessors Interview Questions
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flags.
Post Your Answer!
Send This to a Friend
← What is Emulator?
Define LAHF and SAHF instructions in 8086. →
Related Interview Questions
What is the difference between 8086 and 8088? 10.01.09
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
What is pipelining? 26.11.08
A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is DAS instruction ? 14.11.08
DAS : Decimal Adjust After Subtraction This instruction converts the binary result of a SUB or SBB instruction in AL to Packed BCD format. It operates only on...
What is the use of PUSHF instruction used in 8086 ? 14.11.08
It pushes the flag register contents to the top of the stack. No flags are affected....
What is the use of Instruction pointer in 8086 ? 14.11.08
Instruction pointer holds the 16 bit address of the next code byte within the code segment. The value contained in the IP is called effective address or offset....
What is the difference between 8086 and 8088? 10.11.08
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086. in 8086 instruction buffer q(ibq) is 6bytes a...
Which StacWhich Stack is used in 8086? k is used in 8086? 26.03.06
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first....
What is the difference between 8086 and 8088? 26.03.06
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
Posted in Microprocessors Interview Questions
Test instruction is the same as the AND instruction except that ite does not put the result anywhere. Like the CMP instruction , it is used only to set the flags.
Post Your Answer!
Send This to a Friend
← What is Emulator?
Define LAHF and SAHF instructions in 8086. →
Related Interview Questions
What is the difference between 8086 and 8088? 10.01.09
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
What is pipelining? 26.11.08
A technique used in advanced microprocessors where the microprocessor begins executing a second instuction before the first has been completed. That is, several...
What is AAS instruction in 8086 ? 14.11.08
Adjust Result of ASCII Subtraction This instruction adjust the binary result of SUB or SBB instruction....
What is the use of Directives in 8086 ? 14.11.08
Directives in 8086 give directions to the assembler during the assembly process but are not translated into machine instruction....
What is DAS instruction ? 14.11.08
DAS : Decimal Adjust After Subtraction This instruction converts the binary result of a SUB or SBB instruction in AL to Packed BCD format. It operates only on...
What is the use of PUSHF instruction used in 8086 ? 14.11.08
It pushes the flag register contents to the top of the stack. No flags are affected....
What is the use of Instruction pointer in 8086 ? 14.11.08
Instruction pointer holds the 16 bit address of the next code byte within the code segment. The value contained in the IP is called effective address or offset....
What is the difference between 8086 and 8088? 10.11.08
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086. in 8086 instruction buffer q(ibq) is 6bytes a...
Which StacWhich Stack is used in 8086? k is used in 8086? 26.03.06
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first....
What is the difference between 8086 and 8088? 26.03.06
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086....
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