Signal Processing MCQ Questions & Answers

71

The system that is sometimes represented symbolically as x[n] → y[n] is called:

A) Unit impulse system B) Continuous-time system C) Unit step system D) Discrete-time system

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Answer & Solution

Answer: Option D

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72

If ROC1 is the region of convergence of x(n) and ROC2 is the region of convergence of y(n), then x(n) ∗ y(n) is . . . . . . . .

A) ROC1 Union ROC2 B) ROC1 - ROC2 C) ROC1 Intersection ROC2 D) ROC1 + ROC2

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Answer & Solution

Answer: Option C

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73

The transfer function of a system $$Z\left( s \right) = \frac{{V\left( s \right)}}{{I\left( s \right)}} = \frac{s}{{s + 3}}.$$ The system is at restfor t < 0. What will be the value of v(t) for t ≥ 0, if i(t) = 3u(t), where u(t) is a step function

A) e^-t B) 4e^-t C) 2e^-3t D) 3t^-3t

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Answer & Solution

Answer: Option D

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74

If $$L\left[ {f\left( t \right)} \right] = \frac{{2\left( {s + 1} \right)}}{{\left( {{s^2} + 2s + 5} \right)}},$$ then f(0⁺) and f(∞) are given by

A) 0, 2 respectively B) 2, 0 respectively C) 0,1 respectively D) $$\frac{2}{5},$$ 0 respectively

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Answer & Solution

Answer: Option B

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75

The impulse function $$\int\limits_{{t_1}}^{{t_2}} {x\left( t \right){\delta ^n}\left( {t - {t_0}} \right)dt} $$ is equal to

A) nx(t₀) B) xⁿ(t₀) C) x(t₀) D) (-1)ⁿxⁿ(t₀)

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Answer & Solution

Answer: Option C

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76

If a periodic waveform is half-wave symmetric, it must be represented by a function satisfying the relationship

A) f(t) = f(-t) B) f(t) = -f(t + T/2) C) f(t) = -f(-t) D) f(t) = f(t + T/2)

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Answer & Solution

Answer: Option B

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77

Fourier transform is not possible for

A) u(t) B) δ(t) C) tu(t) D) sinω_ot

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Answer & Solution

Answer: Option C

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78

An IIR filter having numerator order M and denominator order N is to be realized using direct form II structure. How much total number of multiplications, additions and memory locations are required respectively?

A) M + N, M + N and {M + N} B) M + N, M + N and maximum of [M, N] C) M + N + 1, M + N + 1 and M + N D) M + N + 1, M + N and maximum of {M, N}

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Answer & Solution

Answer: Option D

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79

Match List-I with List-II ) and select the correct answer using the options given below:

List-I (Input-output relation)	List-II (Property of the system)
a. y(n) = x(n)	1. Nonlinear, non-causal
b. y(n) = x(n²)	2. Linear, non-causal
c. y(n) = x²(-n)	3. Linear, causal
d. y(n) = x²(n)	4. Nonlinear, causal

A) a-1, b-4, c-3, d-2 B) a-3, b-2, c-1, d-4 C) a-1, b-2, c-3, d-4 D) a-3, b-4, c-1, d-2

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Answer & Solution

Answer: Option B

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80

Let x(t) ↔ X(jω) be Fourier Transform pair. The Fourier Transform of the signal x(5t - 3) in terms of X(jω) is given as

A) $$\frac{1}{5}{e^{\frac{{ - j3\omega }}{5}}}X\left( {\frac{{j\omega }}{5}} \right)$$ B) $$\frac{1}{5}{e^{\frac{{j3\omega }}{5}}}X\left( {\frac{{j\omega }}{5}} \right)$$ C) $$\frac{1}{5}{e^{ - j3\omega }}X\left( {\frac{{j\omega }}{5}} \right)$$ D) $$\frac{1}{5}{e^{j3\omega }}X\left( {\frac{{j\omega }}{5}} \right)$$

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Answer & Solution

Answer: Option A

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Signal Processing MCQ Questions & Answers | ECE