Z Transform MCQ Questions & Answers

Question 1

What is the set of all values of z for which X(z) attains a finite value?

A. Radius of convergence
B. Radius of divergence
C. Feasible solution
D. None of the mentioned

Question 2

Is the discrete time LTI system with impulse response h(n)=an(n) (|a| < 1) BIBO stable?

A. TRUE
B. FALSE

Question 3

The convolution of a signal in time domain can be viewed as __________

A. Multiplication in z-domain
B. Squaring in z-domain
C. Doubling the signal in z-domain
D. Convolution in z-domain

Question 4

The impulse response of a discrete time system is the inverse Z-transform of the transfer function of the system in z-domain.

A. TRUE
B. FALSE

Question 5

The ROC of z-transform of any signal cannot contain poles.

A. TRUE
B. FALSE

Question 6

The unit delay operator can be thought of in the z-domain as ___________

A. Multiplication by z-1
B. Multiplication by z
C. Multiplication by z-2
D. Multiplication by z2

Question 7

What is the ROC of a causal infinite length sequence?

A. |z|B. |z|>r1
C. r2<|z|D. None of the mentioned

Question 8

What is the ROC of the signal x(n)=δ(n-k), k>0?

A. z=0
B. z=∞
C. Entire z-plane, except at z=0
D. Entire z-plane, except at z=∞

Question 9

What is the ROC of the system function H(z) if the discrete time LTI system is BIBO stable?

A. Entire z-plane, except at z=0
B. Entire z-plane, except at z=∞
C. Contain unit circle
D. None of the mentioned

Question 10

What is the ROC of the z-transform of the signal x(n)= anu(n)+bnu(-n-1)?

A. |a|<|z|<|b|
B. |a|>|z|>|b|
C. |a|>|z|<|b|
D. |a|<|z|>|b|

Question 11

What is the ROC of z-transform of an two sided infinite sequence?

A. |z|>r1
B. |z|C. r2<|z|D. None of the mentioned

Question 12

What is the ROC of z-transform of finite duration anti-causal sequence?

A. z=0
B. z=∞
C. Entire z-plane, except at z=0
D. Entire z-plane, except at z=∞