DFCCIL EE/EC Signals & Systems QUIZ - 1

Which of the following discrete time signal is not periodic?

For the signal x(t) = –t for –1 ≤ t ≤ 0 and zero otherwise, then the signal y(t) = –x(–t – 2) in the interval –1 < t < –2 has

Consider a discrete time signal as follows:

If y[n] = x[n] + x[–n], then energy of the signal y[n] will be

The impulse response of four CT systems S₁, S₂, S₃ and S₄ are given respectively as

h₁(t) = δ(t)

h₄(t) = cos(100t) u(t)

Which of these system is not BIBO stable

The input output relation of a system is y(n) = {2}^x(n) x(n), then the system is