Signals and Systems Quiz Questions and Answers Pdf - 2

Question: 6

The sum of two or more arbitrary sinusoids is

(A) Periodic only if all the sinusoids are identical in frequency and phase

(B) Never periodic

(C) Always periodic

(D) Periodic under certain conditions

Question: 7

Absolute encoders are normally used for

(A) Counting least significant bits

(B) Continuous speed in counterclockwise direction

(C) Continuous speed in clock direction

(D) One revolution

Question: 8

The discrete time system described by y(n) = x(n)² is

(A) Causal, linear and time varying

(B) Causal, non linear and time varying

(C) Non causal, linear and time varying

(D) Non causal, non linear and time invariant

Question: 9

The property of Fourier transforms which states that the compression in time domain is equivalent to expansion in the frequency domain is

(A) Frequency shifting

(B) Time scaling

(C) Scaling

(D) Duality

Question: 10

In the case of a random variable dealing with non deterministic signals.

(A) Sometimes the events associated with random variable are deterministic

(B) The values assumed by signals are always deterministic

(C) It is a function from space of outcomes to the real/complex numbers

(D) It is a function with the probabilities of outcomes as random numbers