# Autocorrelation MCQ [Free PDF] – Objective Question Answer for Autocorrelation Quiz

11. Autocorrelation function of periodic signal is equal to _______

A. Energy of the signal
B. Power of the signal
C. Its area in the  frequency domain
D. None of the mentioned

The autocorrelation function of an areal-valued signal is equal to the energy of the signal and the autocorrelation function of the periodic signal is equal to the average power of the signal.

12. Autocorrelation is a _______ function.

A. Real and even
B. Real and odd
C. Complex and even
D. Complex and odd

According to the properties of the autocorrelation function, it is an even function when the frequency value f is real.

13. What  Autocorrelation function of white noise will have?

A. Strong peak
B. Infinite peak
C. Weak peak
D. None of the mentioned

The autocorrelation function curve of the continuous-time white noise signal has a strong peak.

14. Random variables give the relationship between _____

A. Two random events
B. Probability of occurrence of two random events
C. Random event and a real number
D. Random event and its probability of occurrence

A random variable gives a functional relationship between a random event and a real number.

15. The distribution function of a  random variable is

A. P(X less than or equal to x)
B. P(X greater than or equal to x)
C. P(X less than x)
D. P(X greater than x)

The distribution function of a random variable is the probability that the value taken by the random variable is less than or equal to the real number x.

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16. The distribution function of -(infinity) and (infinity) is _____

A. 0 and 1
B. 1 and 0
C. Both 0
D. Both 1

The distribution function of -(infinity) and (infinity) is 0 and 1

F(−∞) is 0 and F

(∞)) is 1.

17. The value of the probability density function of a  random variable is

A. Positive function
B. Negative function
C. Zero
D. One

The probability density function is always greater than 0. It is a non-negative function with the area of 1.

18. Which gives the measure of randomness of the random variable?

A. Mean
B. Variance
C. Standard variance
D. Pdf

Variance gives the randomness of the random variable. It is the difference between the mean square value and the square of the mean.

19. Random process is a function of ______

A. Random event and time
B. Random event and frequency
C. Random event and real number
D. None of the mentioned

A random process is a function of two variables: a random event and its time of occurrence.

20. A random process is called stationary in the  strict sense if

A. Its statistics vary with shifts in time origin
B. Its statistics do not vary with a  shift in time origin
C. Its autocorrelation varies with a  shift in time
D. Its autocorrelation does not vary with shifts in time