Signals & Systems Test Questions - Set 4

1)   What is/are the crucial purposes of using the Fourier Transform while analyzing any elementary signals at different frequencies?

a. Transformation from time domain to frequency domain
b. Plotting of amplitude & phase spectrum
c. Both a & b
d. None of the above
Answer  Explanation 

ANSWER: Both a & b

Explanation:
No explanation is available for this question!


2)   What is the possible range of frequency spectrum for discrete time fourier series (DTFS)?

a. 0 to 2π
b. -π to +π
c. Both a & b
d. None of the above
Answer  Explanation 

ANSWER: Both a & b

Explanation:
No explanation is available for this question!


3)   Which among the following assertions represents a necessary condition for the existence of Fourier Transform of discrete time signal (DTFT)?

a. Discrete Time Signal should be absolutely summable
b. Discrete Time Signal should be absolutely multipliable
c. Discrete Time Signal should be absolutely integrable
d. Discrete Time Signal should be absolutely differentiable
Answer  Explanation 

ANSWER: Discrete Time Signal should be absolutely summable

Explanation:
No explanation is available for this question!


4)   What is the nature of Fourier representation of a discrete & aperiodic signal?

a. Continuous & periodic
b. Discrete & aperiodic
c. Continuous & aperiodic
d. Discrete & periodic
Answer  Explanation 

ANSWER: Continuous & periodic

Explanation:
No explanation is available for this question!


5)   A Laplace Transform exists when ______

A. The function is piece-wise continuous
B. The function is of exponential order
C. The function is piecewise discrete
D. The function is of differential order


a. A & B
b. C & D
c. A & D
d. B & C
Answer  Explanation 

ANSWER: A & B

Explanation:
No explanation is available for this question!


6)   Where is the ROC defined or specified for the signals containing causal as well as anti-causal terms?

a. Greater than the largest pole
b. Less than the smallest pole
c. Between two poles
d. Cannot be defined
Answer  Explanation 

ANSWER: Between two poles

Explanation:
No explanation is available for this question!


7)   Which result is generated/ obtained by the addition of a step to a ramp function?

a. Step Function shifted by an amount equal to ramp
b. Ramp Function shifted by an amount equal to step
c. Ramp function of zero slope
d. Step function of zero slope
Answer  Explanation 

ANSWER: Ramp Function shifted by an amount equal to step

Explanation:
No explanation is available for this question!


8)   Unilateral Laplace Transform is applicable for the determination of linear constant coefficient differential equations with ________

a. Zero initial condition
b. Non-zero initial condition
c. Zero final condition
d. Non-zero final condition
Answer  Explanation 

ANSWER: Non-zero initial condition

Explanation:
No explanation is available for this question!


9)   What should be location of poles corresponding to ROC for bilateral Inverse Laplace Transform especially for determining the nature of time domain signal?

a. On L.H.S of ROC
b. On R.H.S of ROC
c. On both sides of ROC
d. None of the above
Answer  Explanation 

ANSWER: On both sides of ROC

Explanation:
No explanation is available for this question!


10)   Generally, the convolution process associated with the Laplace Transform in time domain results into________

a. Simple multiplication in complex frequency domain
b. Simple division in complex frequency domain
c. Simple multiplication in complex time domain
d. Simple division in complex time domain
Answer  Explanation 

ANSWER: Simple multiplication in complex frequency domain

Explanation:
No explanation is available for this question!