Digital Signal Processing Multiple Choice Questions and Answers

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

View Answer

Answer:All of the mentioned

2 The z-transform of a signal x(n) whose definition is given by

is known as _____________

A Unilateral z-transform

B Bilateral z-transform

C Rational z-transform

D None of the mentioned

View Answer

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

View Answer

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

View Answer

Answer:5+7z^-1+z^-3

5 What is the one sided z-transform of x(n)=δ(n-k)?

A z^-k

B z^k

C 0

D 1

View Answer

Answer:z^-k

6 What is the one sided z-transform of x(n)=δ(n+k)?

A z^-k

B 0

C z^k

D 1

View Answer

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

View Answer

Answer:None of the mentioned

8 If p_k, k=1,2,…N are the poles of the system and |p_k| < 1 for all k, then the natural response of such a system is called as Transient response.

A True

B False

View Answer

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

View Answer

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

View Answer

Answer:Slow

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