# Properties of Systems – 3 MCQ’s

This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Properties of Systems – 3″.

1. Which among the following is a memory less system?
a) Delay
b) Summer
c) Resistor
d) Capacitor

2. In a continuous-time physical system, memory is directly associated with _____________
a) Storage registers
b) Time
c) Storage of energy
d) Number of components in the system

3. Which one of the following is an example of a system with memory?
a) Identity System
b) Resistor
c) y(n)=x(n)-2x(n)
d) Accumulator

4. A system with memory which anticipates future values of input is called _________
a) Non-causal System
b) Non-anticipative System
c) Causal System
d) Static System

5. Which among the following is an application of non-causal system?
a) Image processing
b) RC circuit
c) Stock market Analysis
d) Automobile

6. Is the system y[n]=2x[n]+2 linear?
a) YES
b) NO

7. Determine the nature of the system: y(n)=x(-n).
a) Causal
b) Non-causal
c) Causal for all positive values of n
d) Non-causal for negative values of n

8. Determine the nature of the given system: y(t)=x(sint)
a) Causal, Non-linear
b) Causal, Linear
c) Non-Causal, Non-linear
d) Non-causal, Linear

9. An inverse system with the original system gives an output equal to the input. How is the inverse system connected to the original system?
a) Series
c) parallel
d) No connection

10. Which among the following is an invertible system?
a) y[n] = 0
b) y[n] = 2x[n]
c) y(t) = x2(t)
d) y(t) = dx(t)/dt

11. Is the system time invariant: y(t) = x(4t)?
a) YES
b) NO

12. Determine the nature of the system: y[n] = x[n]x[n – 1] with unit impulse function as an input.
a) Dynamic, output always zero, non-invertible
b) Static, output always zero, non-invertible
c) Dynamic, output always 1, invertible
d) Dynamic, output always 1, invertible

13. Determine the nature of the system: y(t)= t2 x(t-1)
a) Linear, time invariant
b) Linear, time variant
c) Non-linear, time invariant
d) Non-linear, time variant

14. y[n]=rn x[n] is ________ system.
a) LTI
b) Time varying
c) Linear and time invariant
d) Causal and time invariant

15. A system is said to be linear if _______
a) It satisfies only the principle of superposition theorem
b) It satisfies only amplitude scaling
c) It satisfies both amplitude scaling and principle of superposition theorem
d) It satisfies amplitude scaling but not the principle of superposition theorem

16. If the input-output relationship is given by y(t) = 2x(t) ddx x(t). What kind of system it represents?
a) Linear system
b) Non linear system
c) LTI system
d) Linear but time-invariant system 5 Star
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