Microprocessors Interview Questions part ---8

Write the uses of microprocessors in Medical Instrumentation field?
Patient Monitoring in Intensive Care Unit, Pathological Analysis and the measurement of parameters like blood pressure and temperature.
Tell me about a problem you had with a supervisor
Biggest trap of all. This is a test to see if you will speak ill of your boss. If you fall for it and tell about a problem with a former boss, you may well below the interview right there. Stay positive and develop a poor memory about any trouble with a supervisor.
Have you consider starting your own business?
Again it’s best to:
Gauge this company’s corporate culture before answering and…
Be honest (which doesn’t mean you have to vividly share your fantasy of the franchise or bed-and-breakfast you someday plan to open).
In general, if the corporate culture is that of a large, formal, military-style structure, minimize any indication that you’d love to have your own business. You might say, “Oh, I may have given it a thought once or twice, but my whole career has been in larger organizations. That’s where I have excelled and where I want to be.”
If the corporate culture is closer to the free-wheeling, everybody’s-a-deal-maker variety, then emphasize that in a firm like this, you can virtually get the best of all worlds, the excitement of seeing your own ideas and plans take shape…combined with the resources and stability of a well-established organization. Sounds like the perfect environment to you.
In any case, no matter what the corporate culture, be sure to indicate that any desires about running your own show are part of your past, not your present or future.
The last thing you want to project is an image of either a dreamer who failed and is now settling for the corporate cocoon…or the restless maverick who will fly out the door with key accounts, contacts and trade secrets under his arms just as soon as his bankroll has gotten rebuilt.
Always remember: Match what you want with what the position offers. The more information you’ve uncovered about the position, the more believable you can make your case

What is a Microprocessor?
Microprocessor is a program-controlled device, which fetches the instructions from memory, decodes and executes the instructions. Most Micro Processor
are single- chip devices.

What are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.

Why crystal is a preferred clock source?
Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.

In 8085 which is called as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.

What is Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.

What happens when HLT instruction is executed in processor?
The Micro Processor
enters into Halt-State and the buses are tri-stated.


Which Stack is used in 8085?
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first

What is Program counter?
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 instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction
What are the various registers in 8085?
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085


What is 1st / 2nd / 3rd / 4th generation processor?
The processor
made of PMOS / NMOS / HMOS / HCMOS technology is called 1st / 2nd / 3rd / 4th generation processor, and it is made up of 4 / 8 / 16 / 32 bits.

Name the processor lines of two major manufacturers?
High-end: Intel - Pentium
(II, III, 4), AMD - Athlon
. Low-end: Intel - Celeron, AMD - Duron. 64-bit: Intel - Itanium 2, AMD - Opteron.

What’s the speed and device maximum specs for Firewire?
IEEE 1394 (Firewire) supports the maximum of 63 connected devices with speeds up to 400 Mbps. Where’s MBR located on the disk? Main Boot Record is located in sector 0, track 0, head 0, cylinder 0 of the primary active partition.