Digital Signal Processing Test

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 )