Some more EC questions

sorry i ve gone very busy so i cudnt continue i will give u some last yr questions of EC.

SUGGESTION: For interview only basics can save you. if u are not able to answer a standard question you will be forgiven, but if you miss a fundamental question only god can save you.

1. formula of DFT
2. Sampling thm.
3. peroidicity of DFT.
4. Y(w) = exp(jw), interpret it.
5. how does FFT reduces computational complexity.
6. convolution formula nd does it apply to all kind of system, if not write convolution formula for LTV system (Answer  is in oppenhiem & wilsky).
7. Define LTV system, give examples
8. spectrum of white noise.
9. two systems were given, cascaded, transfer func in z domain, find net impulse response.
10. Relation between i/p & o/p PSD.
11. Nyquist rate in practical systems.
12. draw voltage divider bias, why its called so, how u will increase bandwidth in dis ckt.
13. range of visible light(frequency)
14. waveform of bsk.
15. a bit stream was given, draw qpsk
16. how will u find B.W of a signal.
17. Define probability. (dnt give formula of probability i.e fav. otcome divided by total, there are three definitions of probabilty, find in any standard book)
18. Define Random variable.
19. what are stochastic process.
20. graph & laplace ofsome basic signals.
21. What is need of VLSI.

i ve written it in haste if u r coming to roorkee

then

brush up ur basics in semiconductor physics from streetman & banerjee

Analog basics (gain , operating pt. op amps, biasing)

Digital basics, special focus on RC ckts.

if i will get time i will arrange some more questions from other syudents.

Best wishes