Signal Processing MCQ Questions & Answers

21

FIR filter having anti-symmetrical impulse response with even filter order can be used to design

A) low-pass, high-pass, band-pass and band-stop B) low-pass and band-pass only C) high-pass and band-stop only D) differentiator and Hilbert transformer

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Answer & Solution

Answer: Option D

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22

Consider the following statements for a system given by $$y\left( n \right) = x\left( n \right)\sum\nolimits_{k = - \infty }^\infty {\delta \left( {n - 3k} \right)} .$$
1. The system is linear.
2. The system is non-linear.
3. The system is causal.
4. The system is non-causal.
Which of the above statements is/are correct?

A) 1 only B) 2 only C) 2 and 4 only D) 1 and 3 only

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Answer & Solution

Answer: Option D

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23

The Fourier transform of Acos Ω₀t is given by

A) Aπ[δ(Ω - Ω₀) + δ(Ω + Ω₀)] B) Aπδ(Ω - Ω₀) C) Aπδ(Ω + Ω₀) D) Aπ[δ(Ω - Ω₀) - δ(Ω + Ω₀)]

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Answer & Solution

Answer: Option A

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24

Consider an LTI system representing a passive electrical network. If the input is a sinusoidal signal, then the steady-state output of the network is

A) sinusoidal with the same amplitude, frequency and phase B) sinusoidal with the same frequency, but possibly different amplitude and phase C) non-sinusoidal D) sinusoidal with a different frequency

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Answer & Solution

Answer: Option B

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25

A digital signal processing system is described by the expression:
y(n) = 2x(n) + x(n - 1) + 2y(n - 1) The system is:

A) A stable FIR filter B) A stable IIR filter C) An unstable FIR filter D) An unstable IIR filter

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Answer & Solution

Answer: Option D

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26

Consider the following system
H(ejω) is a . . . . . . . . with band limited frequency . . . . . . . .
Signal Processing mcq question image

A) low pass filter, $$\frac{\pi }{2}$$ B) low pass filter, $$\frac{\pi }{3}$$ C) low pass filter, $$\frac{\pi }{6}$$ D) low pass filter, $$\frac{\pi }{5}$$

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Answer & Solution

Answer: Option B

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27

Using Z-transform method obtain impulse response of a system described by y(n) = 2.5y(n - 1) + x(n)

A) h(n) = (25)ⁿ u(n) B) h(n) = (2.5)ⁿ u(n) C) h(n) = (0.25)ⁿ u(n) D) h(n) = 2ⁿ u(n - 1)

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Answer & Solution

Answer: Option B

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28

Which one of the following is the correct Laplace transfer of the signal in the given Figure?
Signal Processing mcq question image

A) $$\frac{1}{{2{s^2}}}\left[ {1 - {e^{ - 2s}}\left( {1 + 2s} \right)} \right]$$ B) $$\frac{1}{{2{s^2}}}\left[ {{e^{ - 2s}} - \left( {1 - 2s} \right)} \right]$$ C) $$\frac{1}{{2{s^2}}}\left[ {{e^{ - 2s}} + \left( {1 - 2s} \right)} \right]$$ D) $$\frac{1}{{2{s^2}}}\left[ {1 - {e^{ - 2s}} + 2s} \right]$$

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Answer & Solution

Answer: Option B

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29

The correlation function of a wide-sense stationary random process representing a non-deterministic signal is

A) not a deterministic function B) deterministic, but not symmetric function C) sometimes non-deterministic function D) always deterministic and symmetric function

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Answer & Solution

Answer: Option D

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30

Find the final value of the system corresponding to $$Y\left( s \right) = \frac{{3\left( {s + 2} \right)}}{{s\left( {{s^2} + 2s + 10} \right)}}$$

A) 0.3 B) 3 C) 0.6 D) 2

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Answer & Solution

Answer: Option C

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Signal Processing MCQ Questions & Answers | ECE