Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 In general, a digital system designer has better control of tolerances in a digital signal processing system than an analog system designer who is designing an equivalent analog system.
A True
B False

Answer:True
2 The term ‘bandwidth’ represents the quantitative measure of a signal.
A True
B False

Answer:True
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3 What is the frequency range(in Hz) of Electroencephalogram(EEG)?
A 10-40
B 1000-2000
C 0-100
D None of the mentioned

Answer:0-100
4 Which of the following electromagnetic signals has a frequency range of 30kHz-3MHz?
A Radio broadcast
B Shortwave radio signal
C RADAR
D Infrared signal

Answer:Radio broadcast
5 Which of the following relations are true if x(n) is real?
A X(ω)=X(-ω)
B X(ω)=-X(-ω)
C X*(ω)=X(ω)
D X*(ω)=X(-ω)

Answer:X*(ω)=X(-ω)
6 If X(ω) is the Fourier transform of the signal x(n), then what is the Fourier transform of the signal x(n-k)?
A ejωk. X(-ω)
B ejωk. X(ω)
C e-jωk. X(-ω)
D e-jωk. X(ω

Answer:e-jωk. X(ω
7 What is the convolution of the sequences of x1(n)=x2(n)={1,1,1}?
A {1,2,3,2,1}
B {1,2,3,2,1}
C {1,1,1,1,1}
D {1,1,1,1,1}

Answer:{1,2,3,2,1}
8 If x(n)=Aejωn is the input of an LTI system and h(n) is the response of the system, then what is the output y(n) of the system?
A H(-ω)x(n)
B -H(ω)x(n)
C H(ω)x(n)
D None of the mentioned

Answer:H(ω)x(n)
9 If the system gives an output y(n)=H(ω)x(n) with x(n) = Aejωnas input signal, then x(n) is said to be Eigen function of the system.
A True
B False

Answer:True
10 If the Eigen function of an LTI system is x(n)= Aejnπ and the impulse response of the system is h(n)=(1/2)nu(n), then what is the Eigen value of the system?
A 3/2
B -3/2
C -2/3
D 2/3

Answer:2/3
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