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 Z _{1} is zero then what would be the value of Z_{1}^{-1} or 1/ Z_{1 }??**

**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

**b.** Adder overflow limit cycle

**c. Round off noise**

**d.** Limit cycles

**The effects caused due to finite word lengths are ??**

**1) Coefficient quantization error
2) Adder overflow limit cycle
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 < N^{2}

**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[n^{2}]

**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>

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