Signal Processing - Study Mode

[#326] A system with input x[n] and output y[n] is given as $$yleft( n
ight) = left( {sin {5 over 6}pi n}
ight)xleft( n
ight).$$ The system is
Correct Answer

(C) Linear, stable and non-invertible

[#327] The Fourier transform of a voltage signal x(t) is X(f). The unit of |X(f)| is
Correct Answer

(A) Volt

[#328] An excitation is applied to a system at t = land its response is zero for -∞ < t < T. Such a system is a
Correct Answer

(C) Causal system

[#329] A realization of a stable discrete time system is shown in figure. If the system is excited by a unit step sequence input x[n], the response y[n] is
Correct Answer

(C) $$5{left( { - frac{1}{3}} ight)^n}uleft[ n ight] - 3{left( { - frac{2}{3}} ight)^n}uleft[ n ight]$$

[#330] Match the following and choose the correct combination. Group I Group II E. Continuous and aperiodic signal 1. Fourier representation is continuous and aperiodic. F. Continuous and periodic signal 2. Fourier representation is discrete and aperiodic. G. Discrete and aperiodic signal 3. Fourier representation is continuous and periodic. H. Discrete and periodic signal 4. Fourier representation is discrete and periodic.
Correct Answer

(C) E-1, F-2, G-3, H-4