Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 Which of the following method is used to find the inverse z-transform of a signal?
A Counter integration
B Expansion into a series of terms
C Partial fraction expansion
D All of the mentioned

Answer:All of the mentioned
2  The z-transform of a signal x(n) whose definition is given by X(z)=\sum_{n=0}^{\infty} x(n)z^{-n} is known as _____________
A Unilateral z-transform
B Bilateral z-transform
C Rational z-transform
D None of the mentioned

Answer:Unilateral z-transform
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3 For what kind of signals one sided z-transform is unique?
A All signals
B Anti-causal signal
C Causal signal
D None of the mentioned

Answer:Causal signal
4 What is the one sided z-transform X+(z) of the signal x(n)={1,2,5,7,0,1}?
A z2+2z+5+7z-1+z-3
B 5+7z+z3
C z-2+2z-1+5+7z+z3
D 5+7z-1+z-3

Answer:5+7z-1+z-3
5 What is the one sided z-transform of x(n)=δ(n-k)?
A z-k
B zk
C 0
D 1

Answer:z-k
6 What is the one sided z-transform of x(n)=δ(n+k)?
A z-k
B 0
C zk
D 1

Answer:0 =0, elsewhere
7 If all the poles of H(z) are outside the unit circle, then the system is said to be _____________
A Only causal
B Only BIBO stable
C BIBO stable and causal
D None of the mentioned

Answer:None of the mentioned
8  If pk, k=1,2,…N are the poles of the system and |pk| < 1 for all k, then the natural response of such a system is called as Transient response.
A True
B False

Answer:True
9 If all the poles have small magnitudes, then the rate of decay of signal is __________
A Slow
B Constant
C Rapid
D None of the mentioned

Answer:Rapid
10 If one or more poles are located near the unit circle, then the rate of decay of signal is _________
A Slow
B Constant
C Rapid
D None of the mentioned

Answer:Slow

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