Signal Processing MCQ Questions & Answers

91

The region of convergence of the z-transform of a unit step function is

A) |z| > 1 B) |z| < 1 C) (Real part of z) > 0 D) (Real part of z) < 0

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Answer & Solution

Answer: Option A

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92

The region of convergence of the z-transform of a unit step function is

A) |z| > 1 B) |z| < 1 C) (Real part of z) > 0 D) (Real part of z) < 0

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Answer & Solution

Answer: Option A

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93

Poles of Butterworth and Chebyshev low pass filters are located on . . . . . . . . and . . . . . . . . respectively in s-plane.

A) Ellipse, circle B) Circle, ellipse C) Circle, circle D) Standard ellipse, tilted ellipse

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Answer & Solution

Answer: Option B

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94

Let function A = sinω₀t and B = sin(ω₀t + φ). The power of two signals; P_A and P_B is related as

A) P_B = φP_A B) P_B = $$\frac{1}{\phi }$$ P_A C) P_B = tanφP_A D) P_B = P_A = P

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Answer & Solution

Answer: Option D

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95

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

List-I (Time Function)	List-II (Fourier Spectrum/Fourier Transform)
a. Periodic Function	1. Continuous spectrum at all frequencies
b. Aperiodic Function	2. -jπ{δ(ω - ω₀) - δ(ω + ω₀)}
c. Unit Impulse δ(t)	3. Line discrete spectrum
d. sin ω(t)	4. 1

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

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Answer & Solution

Answer: Option B

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96

Which of the following is introduced in the frequency sampling realization of the FIR filter?

A) Poles are more in number on unit circle B) Zeros are more in number on the unit circle C) Poles and zeros at equally spaced points on the unit circle D) None of the above

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Answer & Solution

Answer: Option C

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97

The convolution of f(t) with itself is given to be $$\int_0^t {f\left( \tau \right)d\tau .} $$ Then what is f(t)?

A) The unit ramp function B) Equal to 1 C) The unit step function D) The unit impulse function

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Answer & Solution

Answer: Option C

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98

If x[n] = -x[-n], then

A) \[\sum\limits_{n = - \infty }^\infty {x\left[ n \right] = 1} \] B) \[\sum\limits_{n = - \infty }^\infty {x\left[ n \right] = 0} \] C) \[\sum\limits_{n = 0}^\infty {x\left[ n \right] = 1} \] D) \[\sum\limits_{n = 0}^\infty {x\left[ n \right] = 0} \]

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Answer & Solution

Answer: Option B

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99

A signal x(t) is band-limited to 2Hz, and y(t) = x³(t) + x(t) + 1. The Nyquist sampling frequency of y(t) is:

A) 3 Hz B) 6 Hz C) 12 Hz D) 27 Hz

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Answer & Solution

Answer: Option B

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100

The output of a system with impulse response δ[n - 2] to an input signal, u[n + 2] is:

A) u[n + 2] B) u[n] C) u[n - 2] D) u[n] - u[n - 2]

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Answer & Solution

Answer: Option B

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Signal Processing MCQ Questions & Answers | ECE