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System Properties MCQs

Practice System Properties MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Signals & SystemsSystem Properties

A system is linear if it satisfies the principle of?

  • ASuperposition
  • BAliasing
  • CQuantization
  • DModulation only
Report an error
Correct Answer: A. Superposition
Explanation: Linearity requires additivity and homogeneity, together expressed by the superposition principle.
Reference: Standard signals and systems: system properties
Question 2
Signals & SystemsSystem Properties

A system is time-invariant if?

  • AA time shift of the input produces the same time shift of the output
  • BIts output never changes with time
  • CIt has no memory under all conditions
  • DIts input must be periodic
Report an error
Correct Answer: A. A time shift of the input produces the same time shift of the output
Explanation: For a time-invariant system, delaying the input by t0 delays the corresponding output by the same amount without otherwise changing it.
Reference: Standard signals and systems: system properties
Question 3
Signals & SystemsSystem Properties

A system is causal if its output at any time depends only on?

  • AFuture input values
  • BPresent and past input values
  • CFuture output values only
  • DThe input at t=infinity
Report an error
Correct Answer: B. Present and past input values
Explanation: A causal system cannot depend on future input values; its output may depend on present and past inputs.
Reference: Standard signals and systems: system properties
Question 4
Signals & SystemsSystem Properties

Which system is memoryless?

  • Ay(t)=x(t-2)
  • By(t)=x(t)+x(t-1)
  • Cy(t)=3x(t)
  • Dy(t)=integral from -infinity to t of x(tau)d tau
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Correct Answer: C. y(t)=3x(t)
Explanation: A memoryless system output at time t depends only on the input at that same time.
Reference: Standard signals and systems: system properties
Question 5
Signals & SystemsSystem Properties

The continuous-time system y(t)=x(t-1) is?

  • ANoncausal
  • BCausal with memory
  • CMemoryless and causal
  • DUnstable for every input
Report an error
Correct Answer: B. Causal with memory
Explanation: It depends on a past input value, so it is causal and has memory.
Reference: Standard signals and systems: system properties
Question 6
Signals & SystemsSystem Properties

A system is BIBO stable if every bounded input produces?

  • AA bounded output
  • BAn unbounded output
  • CZero output only
  • DA periodic output only
Report an error
Correct Answer: A. A bounded output
Explanation: BIBO means bounded-input bounded-output stability.
Reference: Standard signals and systems: system properties