Explore topic-wise MCQs in Digital Signal Processing.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Signal Processing knowledge and support exam preparation. Choose a topic below to get started.

1.

The condition with less number of samples L should be avoided.

A. True
B. False
Answer» B. False
Discussion
2.

Which of the following is the disadvantage of Hanning window over rectangular window?

A. More side lobes
B. Less side lobes
C. More width of main lobe
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
3.

The characteristic of windowing the signal called “Leakage” is the power that is leaked out into the entire frequency range.

A. True
B. False
Answer» B. False
Discussion
4.

If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular signal w(n), then what is the Fourier transform of the signal x(n).w(n)?

A. 1/2[W(ω-ω0)- W(ω+ω0)]
B. 1/2[W(ω-ω0)+ W(ω+ω0)]
C. [W(ω-ω0)+ W(ω+ω0)]
D. [W(ω-ω0)- W(ω+ω0)]
Answer» C. [W(ω-ω0)+ W(ω+ω0)]
Discussion
5.

What is the Fourier transform of rectangular window of length L?

A. \(\frac{sin⁡(\frac{ωL}{2})}{sin⁡(\frac{ω}{2})} e^{jω(L+1)/2}\)
B. \(\frac{sin⁡(\frac{ωL}{2})}{sin⁡(\frac{ω}{2})} e^{jω(L-1)/2}\)
C. \(\frac{sin⁡(\frac{ωL}{2})}{sin⁡(\frac{ω}{2})} e^{-jω(L-1)/2}\)
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
6.

If {x(n)} is the signal to be analyzed, limiting the duration of the sequence to L samples, in the interval 0≤ n≤ L-1, is equivalent to multiplying {x(n)} by?

A. Kaiser window
B. Hamming window
C. Hanning window
D. Rectangular window
Answer» E.
Discussion
7.

If the signal to be analyzed is an analog signal, we would pass it through an anti-aliasing filter with B as the bandwidth of the filtered signal and then the signal is sampled at a rate __________

A. Fs ≤ 2B
B. Fs ≤ B
C. Fs ≥ 2B
D. Fs = 2B
Answer» D. Fs = 2B
Discussion
8.

THE_CONDITION_WITH_LESS_NUMBER_OF_SAMPLES_L_SHOULD_BE_AVOIDED.?$

A. True
B. False
Answer» B. False
Discussion
9.

WHICH_OF_THE_FOLLOWING_IS_THE_DISADVANTAGE_OF_HANNING_WINDOW_OVER_RECTANGULAR_WINDOW??$

A. More side lobes
B. Less side lobes
C. More width of main lobe
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
10.

Which of the following is the advantage of Hanning window over rectangular window?

A. More side lobes
B. Less side lobes
C. More width of main lobe
D. None of the mentioned
Answer» C. More width of main lobe
Discussion
11.

The characteristic of windowing the signal called “Leakage” is the power that is leaked out into the entire frequency range.$

A. True
B. False
Answer» B. False
Discussion
12.

If x(n)=cosω0n and W(ω) is the Fourier transform of the rectangular signal w(n), then what is the Fourier transform of the signal x(n).w(n)?$

A. 1/2[W(ω-ω<sub>0</sub>)- W(ω+ω<sub>0</sub>)].
B. 1/2[W(ω-ω<sub>0</sub>)+ W(ω+ω<sub>0</sub>)].
C. [W(ω-ω<sub>0</sub>)+ W(ω+ω<sub>0</sub>)].
D. [W(ω-ω<sub>0</sub>)- W(ω+ω<sub>0</sub>)].
Answer» C. [W(‚âà√¨‚àö¬¢-‚âà√¨‚àö¬¢<sub>0</sub>)+ W(‚âà√¨‚àö¬¢+‚âà√¨‚àö¬¢<sub>0</sub>)].
Discussion
13.

If {x(n)} is the signal to be analyzed, limiting the duration of the sequence to L samples, in the interval 0≤ n≤ L-1, is equivalent to multiplying {x(n)} by:$

A. Kaiser window
B. Hamming window
C. Hanning window
D. Rectangular window
Answer» E.
Discussion
14.

The finite observation interval for the signal places a limit on the frequency resolution.

A. True
B. False
Answer» B. False
Discussion
15.

What is the highest frequency that is contained in the sampled signal?

A. 2Fs
B. Fs/2
C. Fs
D. None of the mentioned
Answer» C. Fs
Discussion
16.

If the signal to be analyzed is an analog signal, we would pass it through an anti-aliasing filter with B as the bandwidth of the filtered signal and then the signal is sampled at a rate:

A. Fs ≤ 2B
B. Fs ≤ B
C. Fs ‚â• 2B
D. Fs = 2B
Answer» D. Fs = 2B
Discussion