Techincal Interview Questions - ELECTRONICS

ELECTRONICS QUESTIONS

· 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 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?
· What is impulse response?
· Explain the advantages and disadvantages of FIR filters compared to IIR counterparts.
· What is CMRR? Explain briefly.
· What do you mean by half-duplex and full-duplex communication? Explain briefly.
· 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?
· When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency?
· For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit?
· 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?