Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 The odd part of a signal x(t) is?
A x(t)+x(-t)
B x(t)-x(-t)
C (1/2)*(x(t)+x(-t))
D (1/2)*(x(t)-x(-t))

Answer:(1/2)*(x(t)-x(-t))
2 Time scaling operation is also known as ___________
A Down-sampling
B Up-sampling
C Sampling
D None of the mentioned

Answer:Down-sampling
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3 What is the condition for a signal x(n)=Brn where r=eαT to be called as an decaying exponential signal?
A 0 < r < ∞
B 0< r <1
C r>1
D r<0

Answer:0
4 The function given by the equation x(n)=1, for n=0; x(n)=0, for n≠0 is a _____________
A Step function
B Ramp function
C Triangular function
D Impulse function

Answer:Impulse function
5 The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Identical’ system is?
A (3,2,1,0)
B (1,2,3,0)
C (0,1,2,3)
D None of the mentioned

Answer:(0,1,2,3)
6 If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be ____________
A Delayed
B Advanced
C No operation
D None of the mentioned

Answer:None of the mentioned
7 The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Delay’ system is?
A (3,2,1,0)
B (1,2,3,0)
C (0,1,2,3)
D None of the mentioned

Answer:(1,2,3,0)
8 The system described by the input-output equation y(n)=nx(n)+bx3(n) is a __________
A Static system
B Dynamic system
C Identical system
D None of the mentioned

Answer:Static system
9 Whether the system described by the input-output equations y(n)=x(n)-x(n-1) a Time-variant system.
A True
B False

Answer:False
10 The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
A True
B False

Answer:True

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