Interivew question for Electronics

1. Where transistor is used?

2.  Give some application with uses microcontroller

3. Why stack pointer is used?

4. What are passive devices?

5. Why CE in used as amplifier?

6.Explain half-duplex and full-duplex communication?

7. What is protocol

8. Which range of signals is used for terrestrial transmission?

9. Why is there need for modulation?

10. Which type of modulation is used in TV transmission?

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

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

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

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

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

16. Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

17. What is the basic difference between Latches and Flip flops?

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

19. Explain an ideal voltage source?

20. Explain zener breakdown and avalanche breakdown?

21. What are the different types of filters?

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

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

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