Signal Processing MCQ Questions & Answers | ECE

A. $$E\left[ {g\left( X \right)} \right] = \int\limits_{ - \infty }^\infty {g\left( X \right)dx} $$

B. $$E\left[ {g\left( X \right)} \right] = \int\limits_{ - \infty }^\infty {g\left( X \right)f\left( X \right)dx} $$

C. $$E\left[ {g\left( X \right)} \right] = \int\limits_{ - \infty }^\infty {{g^ * }\left( X \right)dx} $$

D. $$E\left[ {g\left( X \right)} \right] = \int\limits_{ - \infty }^\infty {\frac{{g\left( X \right)}}{{f\left( X \right)}}dx} $$

A. 1 and 2 only

B. 1 and 3 only

C. 2 and 3 only

D. 1, 2 and 3

A. 1 only

B. 2 only

C. Both 1 and 2 only

D. Neither 1 nor 2

A. -n₀ω₀ + β for any arbitrary real β

B. -n₀ω₀ + 2πk for any arbitrary integer k

C. n₀ω₀ + 2πk for any arbitrary integer k

D. -n₀ω₀φ

A. y(t) = 2x(t - 1) - 3x(t - 2) + x(t - 3)

B. y(t) = 5x(t)

C. y(t) = 2x(t - 1) - x(t - 2) - x(t - 4)

D. y(t) = 2x(t) + 3.6

A. 3e^-tu(t)

B. 3δ(t) - 6e^-2tu(t)

C. 6e^-2tu(t)

D. 3 - 6e^-2tu(t)

A. y(n) + y(n - 1) = x(n) - x(n - 1)

B. y(n) = $$\frac{1}{6}$$ [3x(n) + 2x(n - 1) + 3x(n - 2)]

C. y(n) = $$\frac{1}{6}$$ [x(n) + 2x(n - 1) + 3x(n - 2)]

D. y(n) = $$\frac{1}{4}$$ [x(n) + 2x(n - 1) + x(n - 2)]

A. $$\sqrt 2 \cos \left( {t - \frac{\pi }{4}} \right) - {e^{ - t}}$$

B. $$\sqrt 2 \cos \left( {t - \frac{\pi }{4}} \right) - \frac{1}{2}{e^{ - t}}$$

C. $$2\left( {1 - {e^{ - t}}} \right) + \frac{1}{{\sqrt 2 }}\cos \left( {t - \frac{\pi }{4}} \right)$$

D. $$\sqrt 2 \cos \left( {t\frac{\pi }{4}} \right)$$

A. X(ω) = X(-ω)

B. X(ω) = -X*(ω)

C. X(ω) = X*(ω)

D. X(ω) = X*(-ω)

A. A Dirace delta function

B. An exponentially decreasing function

C. A sinc function

D. A sinc² function