Saturday, January 19, 2008

Microprocessor Interview Questions

What are the different addressing modes in 8085?

What is the difference between MOV and MVI?

What are the functions of RIM, SIM, IN?

What is the immediate addressing mode?

What is an interrupt?

Which line will be activated when an output device require attention from CPU?

Which type of architecture 8085 has?

How many memory locations can be addressed by a microprocessor with 14 address lines?

8085 is how many bit microprocessor?

Why is data bus bi-directional?

What is the function of accumulator?

What is flag, bus?

What are tri-state devices and why they are essential in a bus oriented system?

Why are program counter and stack pointer 16-bit registers?

What does it mean by embedded system?

What are the different flags in 8085?

What happens during DMA transfer?

What do you mean by wait state? What is its need?

What is PSW?

What is ALE? Explain the functions of ALE in 8085.

What is a program counter? What is its use?

What is meant by D-FF?

What is the basic difference between Latches and Flip flops?

What is a multiplexer?

How can you convert an SR Flip-flop to a JK Flip-flop?

How can you convert an JK Flip-flop to a D Flip-flop?

What is Race-around problem? How can you rectify it?

Which semiconductor device is used as a voltage regulator and why?

What do you mean by an ideal voltage source?

What do you mean by zener breakdown and avalanche breakdown?

What is CMRR? Explain briefly.

BPFSK is more efficient than BFSK in presence of noise. Why?

What is meant by pre-emphasis and de-emphasis?

What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

What do you mean by ASCII, EBCDIC?

What do you mean by half-duplex and full-duplex communication? Explain briefly.

When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency?

What are the different types of filters?

What is the need of filtering ideal response of filters and actual response of filters?

What is sampling theorem?

Which range of signals are used for terrestrial transmission?

What is the need for modulation?

Which type of modulation is used in TV transmission?

Why we use vestigial side band (VSB-C3F) transmission for picture?

What is impulse response?

Explain the advantages and disadvantages of FIR filters compared to IIR counterparts.

For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit?

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