Signals and Systems
1
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+2
-0.6
The ROC (region of convergence) of the z-transform of a discrete-time signal is represented by the shaded
region in the z-plane. If the signal $$x\left[ n \right] = \,{\left( {2.0} \right)^{\left| n \right|}}$$ , $$ - \infty < n < + \infty $$ then the ROC of its z-transform is
represented by
2
GATE ECE 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
For the discrete-time system shown in the figure, the poles of the system transfer function are located at

3
GATE ECE 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
The pole-zero diagram of a causal and stable discrete-time system is shown in the figure. The zero at the origin has
multiplicity 4. The impulse response of the system is ℎ[n]. If ℎ[0] =1, we can conclude.


4
GATE ECE 2015 Set 3
MCQ (Single Correct Answer)
+2
-0.6
A realization of a stable discrete time system is shown in the figure. If the system is excited by a
unit step sequence input x[n ] , the response y[ n] is


GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics