Signal Processing MCQ Questions & Answers

51

According to Shanon's theorem, the output from any source of rate R can be coded and transmitted over channel capacity C with the condition that

A) C < R B) C < R² C) C > R D) C > R²

Discuss

Answer & Solution

Answer: Option C

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

52

A discrete time signal is given as $$x\left[ n \right] = \cos \frac{{\pi n}}{9} + \sin \left[ { - \frac{{\pi n}}{7} + \frac{1}{2}} \right].$$
The period N for the periodic signal is

A) 126 B) 32 C) 252 D) 64

Discuss

Answer & Solution

Answer: Option A

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

53

A stable and casual digital infinite impulse response filter has its pole location at

A) unit circle on z - plane B) inside the unit circle on z - plane C) outside the unit circle on z - plane D) anywhere on z - plane

Discuss

Answer & Solution

Answer: Option B

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

54

Which of the following is/are not a property/properties of a power spectral density function S_x(ω)?

A) S_x(ω) is a real function of ω B) S_x(ω) is an even function of ω C) S_x(ω) is a non-positive function of ω i.e. S_x(ω) ≤ for all ω D) All of the above

Discuss

Answer & Solution

Answer: Option C

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

55

Which one of the following is a periodic signal?

A) $${x_1}\left( t \right) = 2{e^{j\left( {t + \frac{\pi }{4}} \right)}}u\left( t \right)$$ B) $${x_2}\left( n \right) = u\left[ n \right] + u\left[ { - n} \right]$$ C) $${x_3}\left[ n \right] = \sum\limits_{k = - \infty }^\infty {\left\{ {\delta \left[ {n - 4k} \right] - \delta \left[ {n - 1 - 4k} \right]} \right\}} $$ D) $${x_4}\left( t \right) = {e^{\left( { - 1 + j} \right)t}}$$

Discuss

Answer & Solution

Answer: Option C

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

56

A network consisting of a finite number of linear resistor (R), inductor (L), and capacitor (C) elements, connected all in series or all in parallel, $$\sum\limits_{k = 1}^3 {{a_k}\cos \left( {k{\omega _0}t} \right),} $$ where a_k ≠ 0, ω₀ ≠ 0. The source has nonzero impedance. Which one of the following is a possible form of the output measured across a resistor in the network?

A) $$\sum\limits_{k = 1}^3 {{b_k}\cos \left( {k{\omega _0}t + {\phi _k}} \right),} {\text{ where }}{b_k} \ne {a_k},\,\forall k$$ B) $$\sum\limits_{k = 1}^3 {{b_k}\cos \left( {k{\omega _0}t + {\phi _k}} \right),} {\text{ where }}{b_k} \ne 0,\,\forall k$$ C) $$\sum\limits_{k = 1}^3 {{a_k}\cos \left( {k{\omega _0}t + {\phi _k}} \right)} $$ D) $$\sum\limits_{k = 1}^2 {{a_k}\cos \left( {k{\omega _0}t + {\phi _k}} \right)} $$

Discuss

Answer & Solution

Answer: Option A

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

57

The direct form structure of an FIR (finite impulse response) filter is shown in the figure.
The filter can be used to approximate a
Signal Processing mcq question image

A) low-pass filter B) high-pass filter C) band-pass filter D) band-stop filter

Discuss

Answer & Solution

Answer: Option C

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

58

Let x(t) be the input to linear, time invariant system the required output is 4x(t - 2). The transfer function of the system should be

A) 4e^j4πf B) 2e^j8πf C) 4e^-j4πf D) 2e^j8πf

Discuss

Answer & Solution

Answer: Option C

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

59

If a discrete time signal x[n] is filtered by a ideal low pass filter with cut-off frequency . . . . . . . . then the output of the filter can be sampled by a factor of 'M' (is and integer) without aliasing.

A) π/Μ B) π/M + 1 C) π/M - 1 D) π/M²

Discuss

Answer & Solution

Answer: Option A

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

60

x(t) is a periodic signal with even symmetry. Then, its trigonometric fourier series expansion will have

A) Only sinusoidal component B) Only cosine component C) A dc component D) Only even harmonic components

Discuss

Answer & Solution

Answer: Option B

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

Signal Processing MCQ Questions & Answers | ECE