Electronic engineer interview questions

  1. What is D-FF?
  2. What is the basic difference between Latches and Flip flops?
  3. What is a multiplexer?
  4. How can you convert an SR Flip-flop to a JK Flip-flop?
  5. How can you convert an JK Flip-flop to a D Flip-flop?
  6. What is Race-around problem? How can you rectify it?
  7. Which semiconductor device is used as a voltage regulator and why?
  8. Explain an ideal voltage source?
  9. Explain zener breakdown and avalanche breakdown?
  10. What are the different types of filters?
  11. What is the need of filtering ideal response of filters and actual response of filters?
  12. What is sampling theorem?
  13. What is impulse response?
  14. Explain the advantages and disadvantages of FIR filters compared to IIR counterparts.
  15. What is CMRR?
  16. Explain half-duplex and full-duplex communication?
  17. Which range of signals is used for terrestrial transmission?
  18. Why is there need for modulation?
  19. Which type of modulation is used in TV transmission?
  20. Why we use vestigial side band (VSB-C3F) transmission for picture?
  21. When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency?
  22. For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit?
  23. BPFSK is more efficient than BFSK in presence of noise. Why?
  24. What is meant by pre-emphasis and de-emphasis?
  25. Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?
  26. Explain ASCII, EBCDIC?
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59 Comments on Electronic engineer interview questions

  1. ravipriya
    Posted 7/9/2008 at 1:31 am | Permalink

    The basic difference between latches and flip flop is that flip flop has enable signal(ie,clock signal).Flip flop change their output depending on the clock signal.But in case of latch,there is no clock signal.

  2. ravipriya
    Posted 7/9/2008 at 1:35 am | Permalink

    EBCDIC Stands for Extended Binary Coded Decimal Interchange Code.Itz 8 bit code.
    ASCII is 7 bit code

  3. ravipriya
    Posted 7/9/2008 at 1:40 am | Permalink

    race around condition:Toggling the output of JK flip flop more than once for a single clock input.This happens because the pulse width of the clock input is greater than the propagation delay of the flip flop.This can be overcome by using Master Slave JK flip flop.

  4. Hasan
    Posted 9/3/2008 at 5:53 am | Permalink

    The basic difference between latches and flip flop is that flip flop has enable signal(ie,clock signal).Flip flop change their output depending on the clock signal.But in case of latch,there is no clock signal.

    but latches has gates (transperant signal)

    flip flop edge sensitive latches level sensitive

  5. MANJUNATH D L
    Posted 9/23/2008 at 5:55 am | Permalink

    Which range of signals is used for terrestrial transmission?

    ANS: Normally it is used in Satellite Comunication
    L-Band is 1-2GHz
    S-Band is 2-4GHz

  6. MANJUNATH D L
    Posted 9/23/2008 at 5:56 am | Permalink

    Latch: Clock will not be requires
    FlipFlop: Clock is requires

  7. MANJUNATH D L
    Posted 9/23/2008 at 5:58 am | Permalink

    Basically 2 Types of filters

    1) Analog : Low,High,Band,Notch
    2) Digital:FIR, IIR, Butterworth, Chebushev Filters

  8. Lokanath
    Posted 10/20/2008 at 10:55 am | Permalink

    ans19-modulation is required to
    1-practicability of antenna size
    2-narrow banding
    3-long distance transmission.
    4-for effective &efficient radiation

  9. Nithyalakshmi
    Posted 11/12/2008 at 7:49 am | Permalink

    Ques no:22

    for asyn.transmission data is kept b/w start & stop bits.so there must b start/stop bit to identify the bits that r being trasnferred.this is known as ‘DATAFRAMING’.the start/stop bits r pre-defined.(i.e high or low).

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