Discrete-Time Signals and Systems MCQ

Discrete-Time Signals and Systems MCQ

Discrete-Time Signals and Systems MCQ, Multiple Choice Questions on discrete-Time Signals and Systems, Digital Signal Processing MCQ, Discrete-Time Signals MCQ, Discrete-Time Systems MCQ, Engineering MCQ

Discrete Convolution and Correlation MCQ

Objective Type Questions

Q.1. A signal can be represented in

  • time domain
  • frequency domain
  • both time and frequency domain
  • none of these

Answer: both time and frequency domain

Q.2.  δ(n) =

  • u(n) + u(n – 1)
  • u(n) u(n – 1)
  • u(n) – u(n – 1)
  • u(n – 1) – u(n)

Answer: u(n) – u(n – 1)

Q.3. A deterministic signal has

  • no uncertainty
  • uncertainty
  • partial uncertainty
  • none of these

Answer: no uncertainty

Q.4. A random signal has

  • no uncertainty
  • uncertainty
  • partial uncertainty
  • none of these

Answer: uncertainty

Q.5. The fundamental period of a discrete-time complex exponential sequence is N =

  • \frac{2\Pi }{\omega_{0}}
  • \frac{2\Pi }{m}\omega_{0}
  • \frac{2\Pi }{\omega_{0}}m
  • 2\Pi m \omega_{0}

Answer: \frac{2\Pi }{\omega_{0}}m

Q.6. The fundamental period of a sinusoidal sequence is N =

  • 2\Pi m
  • \frac{\omega_{0} }{2\Pi m}
  • m\omega_{0}
  • \frac{2\Pi }{\omega_{0}}m

Answer: \frac{2\Pi }{\omega_{0}}m

Q.7. A signal is an energy signal if

  • E = 0, P = 0
  • E = ∞, P = finite
  • E = finite, P = 0
  • E = finite, P = ∞

Answer: E = finite, P = 0

Q.8. A signal is a power signal if

  • P = finite, E = 0
  • P = finite, E = ∞
  • P = finite, E = finite
  • P = ∞, E = ∞

Answer: P = finite, E = ∞

Q.9. The signal αnu(n) is an energy signal if

  • | α| < 1
  • | α| > 1
  • | α| = 1
  • | α| = 0

Answer: | α| < 1

Q.10. The signal αnu(n) is a power signal if

  • | α| < 1
  • | α| > 1
  • | α| = 1
  • | α| = 0

Answer: | α| = 1

Q.11. A system whose output depends on future inputs is a

  • static system
  • dynamic system
  • non-causal system
  • both dynamic and non-causal system

Answer: both dynamic and non-causal system

Q.12. A non-anticipative system is a

  • static system
  • dynamic system
  • causal system
  • non-causal system

Answer: causal system

Q.13. y(n) = x(n + 2) is for a

  • linear system
  • dynamic system
  • both linear and dynamic system
  • non-linear system

Answer: both linear and dynamic system

Q.14. y(n) = x(2n) is for a

  • time-invariant system
  • time varying, dynamic system
  • linear, time varying, dynamic system
  • linear, time-invariant, static system

Answer: linear, time varying, dynamic system

Q.15. y(n) = x(–n) is for a

  • non-causal system
  • linear, causal, time-invariant system
  • linear, non-causal, time-invariant system
  • linear, non-causal, time-varying, dynamic system

Answer: linear, non-causal, time-varying, dynamic system

Q.16. y(n) = x(n) + nx(n – 1) is for a

  • dynamic system
  • causal system
  • linear system
  • all of these            

Answer: all of these

Q.17. y(n) = x(n) u(n) is for a

  • static, linear system
  • causal, time-invariant system
  • both the above
  • none of these

Answer: static, linear system

Q.18. A system which has a unique relationship between its input and output is called

  • linear system
  • causal system
  • time-invariant system
  • invertible system

Answer: invertible system

Q.19. A system which does not have a unique relationship between its input and output is called

  • non-linear system
  • non-causal system
  • time-variant system
  • non-invertible system

Answer: non-invertible system

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