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Z-Transform - 3 - Free MCQ Practice Test with solutions, GATE ECE Engineering


MCQ Practice Test & Solutions: Test: Z-Transform - 3 (10 Questions)

You can prepare effectively for Electronics and Communication Engineering (ECE) Signals and Systems with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Z-Transform - 3". These 10 questions have been designed by the experts with the latest curriculum of Electronics and Communication Engineering (ECE) 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 10

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Test: Z-Transform - 3 - Question 1

The z-transform of a signal x[n] is given by

If X (z) converges on the unit circle, x[n] is

Detailed Solution: Question 1


Since X (z) converges on |z|= 1. So ROC must include this circle.

Test: Z-Transform - 3 - Question 2

The transfer function of a system is given as

The h[n] is

Detailed Solution: Question 2

 So system is both stable and causal. ROC includes z = 1.

Test: Z-Transform - 3 - Question 3

The transfer function of a system is given as

Consider the two statements
Statement(i) : System is causal and stable.
Statement(ii) : Inverse system is causal and stable.
The correct option is

Detailed Solution: Question 3

Pole of system at :
Pole of inverse system at : 
For this system and inverse system all poles are inside |z|= 1. So both system are both causal and stable.

Test: Z-Transform - 3 - Question 4

The impulse response of a system is given by

For this system two statement are
Statement (i): System is causal and stable
Statement (ii): Inverse system is causal and stable.
The correct option is

Detailed Solution: Question 4



Pole of this system are inside |z|= 1. So the system is stable and causal.
For the inverse system not all pole are inside |z|= 1.So inverse system is not stable and causal.

Test: Z-Transform - 3 - Question 5

The system
y[n] = cy[n - 1] -0.12 y[n - 2 ] + x[n - 1] + x[n - 2 ] is stable if

Detailed Solution: Question 5

Test: Z-Transform - 3 - Question 6

Consider the following three systems


The equivalent system are

Detailed Solution: Question 6



So y1 and y2 are equivalent.

Test: Z-Transform - 3 - Question 7

The z-transform of a causal system is given as

The x[0] is

Detailed Solution: Question 7

Causal signal 

Test: Z-Transform - 3 - Question 8

The z-transform of a anti causal system is

The value of x[0] is

Detailed Solution: Question 8

Anti causal signal, 

Test: Z-Transform - 3 - Question 9

Given the z-transforms

The limit of x[∝] is

Detailed Solution: Question 9

The function has poles at z = 1, 3/4. Thus final value theorem applies.

Test: Z-Transform - 3 - Question 10

The impulse response of the system shown in fig. P5.4.62 is

Detailed Solution: Question 10



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