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

12. Autocorrelation is a _______ function.

A. Real and even

B. Real and odd

C. Complex and even

D. Complex and odd

13. What Autocorrelation function of white noise will have?

A. Strong peak

B. Infinite peak

C. Weak peak

D. None of the mentioned

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

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)

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

A. 0 and 1

B. 1 and 0

C. Both 0

D. Both 1

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

A. Positive function

B. Negative function

C. Zero

D. One

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

A. Mean

B. Variance

C. Standard variance

D. Pdf

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

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