Signal Processing MCQ Questions & Answers

31

Consider the function f(t) having Laplace transform $$F\left( s \right) = \frac{{{\omega _0}}}{{{s^2} + \omega _0^2}}\operatorname{Re} \left[ s \right] > 0$$
The final value of f(t) would be:

A) 0 B) 1 C) -1 ≤ f(∞) ≤ 1 D) ∞

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

32

The fundamental period of periodic sequence x(n) = n modulo 6 is

A) 6 samples B) 24 samples C) 3 samples D) 12 samples

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

33

The input to a linear delta modulator is a sinusoidal signal having a peak amplitude of 1 volt. The maximum input signal is sampled at 8 times the Nyquist rate. The step size for a 800 Hz input, assuming no slope overload, is:

A) $$\frac{\pi }{{40}}{\text{volts}}$$ B) $$\frac{\pi }{8}{\text{volts}}$$ C) $$\frac{\pi }{{10}}{\text{volts}}$$ D) $$\frac{\pi }{4}{\text{volts}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

34

The Nyquist filter has impulse response given by

A) $$h\left( t \right) = \frac{{\sin \left( {\frac{{\pi t}}{T}} \right)}}{{\left( {\frac{{\pi t}}{T}} \right)}}$$ B) $$h\left( t \right) = \frac{1}{2}\left( {\frac{{\sin \left( {\pi t} \right)}}{{\pi t}}} \right)$$ C) $$h\left( t \right) = \frac{{\sin \left( {\pi t} \right)}}{{\left( {\frac{{\pi t}}{T}} \right)}}$$ D) $$h\left( t \right) = \frac{{\cos \left( {\pi t} \right)}}{{\left( {\frac{{\pi t}}{T}} \right)}}$$

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

35

The system function of the digital filter is

A) $$H\left( Z \right) = \sum\limits_{K = 0}^N {\frac{{{C_K}}}{{1 - {e^P}{K^T}{Z^{ - 1}}}}} $$ B) $$H\left( Z \right) = \sum\limits_{K = 1}^N {\frac{{{C_K}}}{{1 - {e^P}{K^T}{Z^{ - 1}}}}} $$ C) $$H\left( Z \right) = \sum\limits_{K = - N}^N {\frac{{{C_K}}}{{1 - {e^P}{K^T}{Z^{ - 1}}}}} $$ D) $$H\left( Z \right) = \sum\limits_{K = 0}^\infty {\frac{{{C_K}}}{{1 - {e^P}{K^T}{Z^{ - 1}}}}} $$

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

36

The ROC of a stable system must include the

A) Origin B) Infinity C) A ring D) Unit circle

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

37

A band pass signal extends from 1 kHz to 2 kHz. The minimum sampling frequency needed to retain all information in the sampled signal is

A) 1 kHz B) 2 kHz C) 3 kHz D) 4 kHz

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

38

The impulse response of a system is h(t) = tu(t). For an input u(t – 1), the output is

A) $$\frac{{{t^2}}}{2}u\left( t \right)$$ B) $$\frac{{t\left( {t - 1} \right)}}{2}u\left( {t - 1} \right)$$ C) $$\frac{{{{\left( {t - 1} \right)}^2}}}{2}u\left( {t - 1} \right)$$ D) $$\frac{{{t^2} - 1}}{2}u\left( {t - 1} \right)$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

39

A digital filter is said to be an IIR if:

A) it oscillates B) all its poles lie outside the unit circle C) current output depends on the previous output D) one or more denominator coefficients is non-zero

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

40

Transfer functions of FIR filters will have

A) Poles and zeros B) Only poles C) Only zeros D) Only constants

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Signal Processing MCQ Questions & Answers | ECE