# Electronics and Communication Engineering - Signals and Systems

### Exercise :: Signals and Systems - Section 9

1.

The total area under the probability distribution curve is

 A. 1 B. 0 C. depend upon curve equation D. ∞

Explanation:

No answer description available for this question. Let us discuss.

2.

Which one of following is correct condition to check the stability of system?

 A. Bounded I/P unbounded O/P B. Bounded I/P and O/P C. Bounded O/P and I/P D. Bounded I/P Bounded O/P

Explanation:

No answer description available for this question. Let us discuss.

3.

The inverse Fourier transform of the function F(ω) = is

 A. sin ωt B. cos ωt C. sgnt D. u(t)

Explanation:

No answer description available for this question. Let us discuss.

4.

Let f1(t) = G1(t) + 4, f2(t) = G2(t) + 3. If G1(t) and G2(t) are uncorrected then the correlation between f1(t) and f2(t) are

 A. 12 B. 7 C. 6 D. zero

Explanation:

No answer description available for this question. Let us discuss.

5.

If p is the probability of success and q is the probability of failure, then the probability that there are r successes in n trails is

 A. ncr pr qn - r B. ncr pn - r qr C. ncr pr qn + r D. ncr pn qn - r