Signal Processing MCQ Questions & Answers

1

Fourier transform F(jω) of an arbitrary real signal has the property.

A) F(jω) = F(-jω) B) F(jω) = -F(-jω) C) F(jω) = F*(–jω) D) F(jω) = -F*(-jω)

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Answer & Solution

Answer: Option C

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2

The pole-zero diagram of the system:
$$H\left( z \right) = \frac{{1 - az}}{{z - a}}$$ is represented by:
Signal Processing mcq question image

A) High pass B) Low pass C) All pass D) Band pass

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Answer & Solution

Answer: Option C

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3

The required roll-off rate of the frequency response of an anti-aliasing filter will create problems in its design if

A) The sampling frequency is very high B) The sampling frequency is only slightly more than the Nyquist rate C) The sampling frequency is less than the Nyquist rate D) Ideal sampling is employed

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Answer & Solution

Answer: Option C

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4

The impulse δ(t) and unit step function u(t) are related to each other as:

A) δ(t) = $$\frac{{\text{d}}}{{{\text{dt}}}}$$ u(t) B) δ(t) = u(t) + u(2t - 1) C) δ(t) = ∫u(t)dt D) δ(t) = 2.u(t)

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Answer & Solution

Answer: Option A

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5

If a signal f(t) has energy E, the energy of the signal f(2t) is equal to

A) E B) $$\frac{{\text{E}}}{2}$$ C) 2E D) 4E

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Answer & Solution

Answer: Option B

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6

A discrete-time all-pass system has two of its poles at 0.25∠0° and 2∠30° which one of the following statements about the system is TRUE?

A) It has two more poles at 0.5∠30° and 4∠0° B) It is stable only when the impulse response is two-sided C) It has constant phase response over all frequencies D) It has constant phase response over the entire z-plane

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Answer & Solution

Answer: Option B

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7

What is the spectral density of white noise?

A) A constant B) δ(ω) C) [δ(ω)]² D) A step function in ω

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Answer & Solution

Answer: Option A

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8

A causal LTI filter has the frequency response as shown in Fig. If input signal to filter is x(t) = e^-jt, then filter output will be:
Signal Processing mcq question image

A) -2je^-jt B) 2je^-jt C) 4πje^-jt D) -4πje^-jt

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Answer & Solution

Answer: Option B

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9

A rectangular pulse of amplitude A and time duration Z is applied to be matched filter. Its maximum SNR is

A) $$\frac{{2{A^2}Z}}{\eta }$$ B) $$\frac{{{A^2}Z}}{{2\eta }}$$ C) $$\frac{{2AZ}}{\eta }$$ D) $$\frac{{2{A^2}}}{{\eta Z}}$$

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Answer & Solution

Answer: Option A

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10

The ROC of anti-causal sequence is:

A) Entire z - plane B) Entire z - plane except z = 0 C) Entire z - plane except z = ∞ D) Entire z - plane except z = 1

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Answer & Solution

Answer: Option C

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Signal Processing MCQ Questions & Answers | ECE