Signals and Systems Short Questions and Answers

Questions

41 An example of a discrete set of information/system is

A the trajectory of the Sun

B data on a CD

C universe time scale

D movement of water through a pipe

View Answer

Answer: data on a CD

42 A system which is linear is said to obey the rules of

A scaling

B additivity

C both scaling and additivity

D homogeneity

View Answer

Answer: both scaling and additivity

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43 A time invariant system is a system whose output

A increases with a delay in input

B decreases with a delay in input

C remains same with a delay in input

D vanishes with a delay in input

View Answer

Answer: remains same with a delay in input

44 All real time systems concerned with the concept of causality are

A non causal

B causal

C neither causal nor non causal

D memoryless

View Answer

Answer: causal

45 When we take up design of systems, ideally how do we define the stability of a system?

A A system is stable, if a bounded input gives a bounded output, for some values of the input

B A system is unstable, if a bounded input gives a bounded output, for all values of the input

C A system is stable, if a bounded input gives a bounded output, for all values of the input

D A system is unstable, if a bounded input gives a bounded output, for some values of the input

View Answer

Answer: A system is stable, if a bounded input gives a bounded output, for all values of the input

46 All causal systems must have the component of

A memory

B time invariance

C stability

D linearity

View Answer

Answer: memory

47 What is the area of a Unit Impulse function?

A Zero

B Half of Unity

C Depends on the function

D Unity

View Answer

Answer: Unity

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