Top 80+ Solved Signals and Systems MCQ Questions Answer
Q. How does Fourier series make it easier to represent periodic signals?
a. harmonically related
b. periodically related
c. sinusoidally related
d. exponentially related
Q. Weighted superposition of time-shifted impulse responses is termed as for discrete-time signals.
a. convolution integral
b. convolution multiple
c. convolution sum
d. convolution
Q. Find the convolution sum of sequences x1[n] = (1, 2, 3) and x2[n] = (2, 1, 4).
a. {2, 5, 12, 11, 12}
b. {2, 12, 5, 11, 12}
c. {2, 11, 5, 12, 12}
d. {-2, 5,-12, 11, 12}
Q. The Fourier series for the function f (x) = sin2x is
a. 0.5 + 0.5 sin 2x
b. 0.5 – 0.5 sin 2x
c. 0.5 + 0.5 cos 2x
d. 0.5 – 0.5 cos 2x
Q. The type of systems which are characterized by input and the output capable of taking any value in a particular set of values are called as
a. analog
b. discrete
c. digital
d. continuous
Q. Then, y[k] = x[3k-2] is
a. y[k] = 1, for k = 0, 1 and 0 otherwise
b. y[k] = 1, for k = 1 and -1 for k=-1
c. y[k] = 1, for k = 0, 1 and -1 otherwise
d. y[k] = 1, for k = 0, 1 and 0 otherwise
Q. A Discrete signal is said to be even or symmetric if X(-n) is equal to
a. x(n)
b. 0
c. –x(n)
d. –x(-n)
Q. Impulse response is the output of system due to impulse input applied at time=0?
a. linear
b. time varying
c. time invariant
d. linear and time invariant
Q. The convolution of a discrete signal with itself is
a. squaring the signal
b. doubling the signal
c. adding two signals
d. is not possible
Q. The convolution of a function with an impulse function delayed to an instant 3 in time results in
a. an advance in the function by 3 units in time
b. the function itself
c. a delay in the function by 3 units in time
d. cannot be determined
Q. What is the Scope value if the signal generator has a frequency of 2 Hz only?
a. an attenuated signal of same frequency
b. the entire signal at the same frequency
c. the entire signal at reduced frequency
d. an attenuated signal at reduced frequency
Q. If two LTI systems with impulse response h1 (t) and h2 (t) and are connected in parallel then output is given by
a. y(t) = x(t) *(h1(t) + h2(t))
b. y(t) = x(t) + (h1(t) + h2(t))
c. y(t) = x(t) * (h1(t) h2(t))
d. y(t) = (x(t) * h1(t)) + h2(t)
Q. When two LTI systems with impulse responses ha (t) and hb (t) are cascaded then equivalent response is given by
a. h(t) = ha(t) + hb(t)
b. h(t) = ha(t) – hb(t)
c. h(t) = ha(t) hb(t)
d. h(t) = ha(t) * hb(t)