SIGNAL AND SYSTEM MCQS SET 06

SIGNAL AND SYSTEM MCQS SET 06

1)   According to Rayleigh’s theorem, it becomes possible to determine the energy of a signal by________
a. Estimating the area under the square root of its amplitude spectrum
b. Estimating the area under the square of its amplitude spectrum
c. Estimating the area under the one-fourth power of its amplitude spectrum
d. Estimating the area exactly half as that of its amplitude spectrum
ANSWER: (b) Estimating the area under the square of its amplitude spectrum
 

2)   What does the spectral density function of any signal specify?
a. Distribution of energy or power
b. Consumption of energy or power
c. Conservation of energy or power
d. Generation of energy or power
ANSWER: (a) Distribution of energy or power
 

3)   Which among the below mentioned transform pairs is/are formed between the auto-correlation function and the energy spectral density, in accordance to the property of Energy Spectral Density (ESD)?
a. Laplace Transform              b. Z-Transform
c. Fourier Transform                d. All of the above
ANSWER: (c) Fourier Transform
 

4)   The ESD of a real valued energy signal is always ______
a. An even (symmetric) function of frequency
b. An odd (non-symmetric) function of frequency
c. A function that is odd and half-wave symmetric
d. None of the above
ANSWER: (a) An even (symmetric) function of frequency
 

5)   Which among the below mentioned assertions is /are correct?
a. Greater the value of correlation function, higher is the similarity level between two signals
b. Greater the value of correlation function, lower is the similarity level between two signals
c. Lesser the value of correlation function, higher is the similarity level between two signals
d. Lesser the value of correlation function, lower is the similarity level between two signals
a. Only C          b. Only B           c. A & D              d. B & C
ANSWER:  (c) A & D
 

6)   Which function has a provision of determining the similarity between the signal and its delayed version?
a. Auto-correlation Function         b. Cross-correlation Function
c. Both a & b                                    d. None of the above
ANSWER: (a) Auto-correlation Function
 

7)   Which property is exhibited by the auto-correlation function of a complex valued signal?
a. Commutative property             b. Distributive property
c. Conjugate property                   d. Associative property
ANSWER: (c) Conjugate property
 

8)   Where does the maximum value of auto-correlation function of a power signal occur?
a. At origin     b. At extremities      c. At unity      d. At infinity
ANSWER: (a) At origin
 

9)   What does the set comprising all possible outcomes of an experiment known as?
a. Null event    b. Sure event       c. Elementary event     d. None
ANSWER: (b) Sure event
 

10)   What does an each outcome in the sample space regarded as?
a. Sample point               b. Element       c. Both a & b      d. None
ANSWER: (c) Both a & b