# Digital Signal Processing Multiple Choice Questions: Part 5

Digital Signal Processing Multiple Choice Questions. Part 5 of Digital Signal Processing in Electronics Engineering.

## Digital Signal Processing Multiple Choice Questions

In FIR filter design, which among the following parameters is/are separately controlled by using Kaiser window ??

a. Order of filter (M)
b. Transition width of main lobe
c. Both a and b
d. None of the above

For a linear phase filter, if Z1 is zero then what would be the value of Z1-1 or 1/ Z1 ??

a. Zero
b. Unity
c. Infinity
d. Unpredictable

Consider the assertions given below. Which among them is an advantage of FIR Filter ??

a. Necessity of computational techniques for filter implementation
b. Requirement of large storage
c. The incapability of simulating prototype analog filters
d. Presence of linear phase response

The error in the filter output that results from rounding or truncating calculations within the filter is called ??

a. Coefficient quantization error
c. Round off noise
d. Limit cycles

The effects caused due to finite word lengths are ??

1) Coefficient quantization error
3) Round off noise
4) Limit cycles

a. 1, 2, and 3 are correct
b. 1 and 3 are correct
c. 1 and 4 are correct
d. All the four are correct

### DSP MCQs

The Elliptic filters have ??

1) Flat pass band
2) Flat stop band
3) Equiripple pass band
4) Equiripple stop band

a. 1 and 2 are correct
b. 3 and 4 are correct
c. 2 and 3 are correct
d. All the four are correct

The Chebyshev filters have ??

1) Flat pass band
2) Flat stop band
3) Equiripple pass band
4) Tapering stop band

a. 1 and 2 are correct
b. 2 and 4 are correct
c. 2 and 3 are correct
d. All the four are correct

Correlation is used for ??

1) Computation of average power in waveforms
2) Climatography
3) Identification of binary code word in PCM systems
4) Quantization

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 2 and 3 are correct
d. All the four are correct

The nonlinear differential equations are solved using ??

a. Iterative method
b. Cobweb model
c. Phase diagram
d. Power series method

A system is said to be marginally unstable if ??

a. None of the zeros of its transfer function lies on the jω axis of s-plane
b. At least one zero of its transfer function lies on the jω axis of s-plane
c. None of the poles of its transfer function lies on the jω axis of s-plane
d. At least one pole of its transfer function lies on the jω axis of s-plane

Digital Signal Processing Multiple Choice Questions

A system is said to be unstable if ??

a. None of the poles of its transfer function is shifted to the right half of s-plane
b. At least one zero of its transfer function is shifted to the right half of s-plane
c. At least one pole of its transfer function is shifted to the right half of s-plane
d. At least one pole of its transfer function is shifted to the left half of s-plane

Discrete cosine transforms (DCTs) express a function or a signal in terms of ??

a. Sum of cosine functions oscillating at different frequencies
b. Sum of cosine functions oscillating at same frequencies
c. Sum of cosine functions at different sampling intervals
d. Sum of cosine functions oscillating at same sampling intervals

In Overlap-Add Method with the linear convolution of a discrete-time signal of length L and a discrete-time signal of length M, for a length N, zero-padding should be of length ??

a. L, M > N
b. L, M = N
c. L, M < N
d. L, M < N2

The filtering is performed using DFT using ??

1) Limited size or blocks of data
2) Small memory size
3) Large memory size
4) Large segments of data

a. 1, 2, and 3 are correct
b. 3 and 4 are correct
c. 1 and 2 are correct
d. All the four are correct

DFT is applied to ??

a. Infinite sequences
b. Finite discrete sequences
c. Continuous infinite signals
d. Continuous finite sequences

Digital Signal Processing Multiple Choice Questions

The scaling of a sequence x[n] by a factor α is given by ??

a. y[n] = α [x[n]]2
b. y[n] = α x[n2]
c. y[n] = α x[n]
d. y[n] = x[n]x[-n]

Superposition of signals in a linear system refers to the ??

a. Output that is a product of all the signals
b. The output is a sum of all the signals
c. The output that is of the highest amplitude of all the signals
d. The output that is of the largest spectrum of all the signals

One dimensional signal is a function of ??

a. Multiple independent variables
b. Single independent variable
c. Multiple dependent variables
d. Single dependent variable

Two vectors a, b are orthogonal if ??

a. <a,b> = 0
b. <a,b> = <a,b>
c. <a,b> = 1
d. <a,b> = – <a,b>