Signal Processing MCQ Questions & Answers

41

Consider a four point moving average filter defined by the equation $$y\left[ n \right] = \sum\nolimits_{i = 0}^3 {{\alpha _i}x\left[ {n - i} \right].} $$ The condition on the filter coefficients that results in a null at zero frequency is

A) α₁ = α₂ = 0; α₀ = -α₃ B) α₁ = α₂ = 1; α₀ = -α₃ C) α₀ = α₃ = 0; α₁ = α₂ D) α₁ = α₂ = 0; α₀ = α₃

Discuss

Answer & Solution

Answer: Option A

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

42

Which one of the following is correct?
Energy of a power signal is

A) finite B) zero C) infinite D) between 1 and 2

Discuss

Answer & Solution

Answer: Option C

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

43

Consider this variant of the Fibonacci system:
y[n] = y[n - 1] - y[n - 2] + x[n], where x[n] represents the input and y[n] represents the output. The poles of the given system will be:

A) 1, 2 B) 0, 1, 2 C) $${e^{j\frac{\pi }{3}}},\,{e^{ - j\frac{\pi }{3}}}$$ D) $${e^{j\frac{\pi }{3}}},\,{e^{ - j\frac{\pi }{3}}},\,0$$

Discuss

Answer & Solution

Answer: Option C

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

44

For a random signal (continuous time) x(t) defined for t ≥ 0, its probability density function (pdf) at t = t₀ is such that

A) It is non-negative and its integral equals 1 B) Need not be non-negative, but integral equals 1 C) It is non-negative, but integral is not 1 D) None of the above

Discuss

Answer & Solution

Answer: Option A

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

45

If the unit step response of the network is (1 - e^-at), then its impulse response is:

A) a^-1e^-at B) ae^-at C) (1 - a^-1)e^-at D) (1 - a)e^-at

Discuss

Answer & Solution

Answer: Option B

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

46

The range of values of a and b for which the linear time invariant system with impulse response h(n) = aⁿ, n ≥ 0; bⁿ, n < 0 will be stable is

A) |a| < 1, |b| > 1 B) |a| < 1, |b| < 1 C) |a| > 1, |b| > 1 D) |a| > 1, |b| < 1

Discuss

Answer & Solution

Answer: Option A

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

47

Given h[n] = {1, 2, 3, 2, 1}. It is a linear phase FIR filter because

A) h[n] = h[N - 1 - n] B) h[n] has finite number of samples C) h[n] = -h[N - 1 - n] D) h[n] = h[N - n]

Discuss

Answer & Solution

Answer: Option A

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

48

In a trigonometric Fourier series representation of a signal; a^o (or A^o) is:

A) The average value B) The RMS value C) The Mean square value D) The peak value

Discuss

Answer & Solution

Answer: Option A

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

49

If a sequence is circularly shifted in time by 8 units, the magnitude response will

A) remain constant B) increase by 8 C) remain unchanged D) shift by 8 units

Discuss

Answer & Solution

Answer: Option D

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

50

A function of one or more variables which conveys information on the nature of physical phenomenon is called

A) Noise B) Interference C) System D) Signal

Discuss

Answer & Solution

Answer: Option D

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

Signal Processing MCQ Questions & Answers | ECE