## Digital Signal Processing Test

**The condition of periodicity for a discrete time signal can be defined mathematically as ________. (Note: Here Number ‘N’ is the period of the signal.)**

a. x ( n ) = x ( n + N/2 )

b. x ( n ) = x ( n + 2N )

c. x ( n ) = x ( n + N )

d. None of the above

**The sampling theorem holds true for the following condition________. (Note: Here ‘fs’ is the sampling frequency, and ‘w’ is the maximum frequency of the continuous time signal x (t)).**

a. fs < 2 ω

b. fs > 2 ω

c. fs < ω / 2

d. fs > ω / 2

**Quantization of a signal_____________.**

a. reduces bandwidth requirement

b. increases bandwidth requirement

c. does not have any effect on bandwidth

**The finite impulse response ( F.I.R ) filters are also called_________.**

a. recursive filters

b. feedback filters

c. non-recursive filters

d. notch filters

**The frequency warping effect occurs because of___________.**

a. linear mapping

b. frequency expansion

c. amplitude attenuation

d. non-linear mapping

**A non-periodic signal has a period ( T ) of _______.**

a. T = ∞

b. T = 0

c. T = 1

d. T = 2

**For the signal x ( t ) = 3cos600πt + 2cos1800πt , the folding frequency is __________.**

a. 600 Hz

b. 1800 Hz

c. 900 Hz

d. 500 Hz

**In DFT equation, the symbol for circularly even sequence is _________.**

a. x (( n ))

b. x (( n – k ))

c. x (( -n ))

d. x ( N-n ) = x ( n )