# Electronics Engineering Objective Questions { Discrete Time Signals and Systems }

36. Match the following and choose the correct combination. E continuous and aperiodic signal F. continuous and periodic signal G Discrete and aperiodic signal H. Discrete and periodic signal Group 2 1. Fourier representation is continuous and aperiodic 2. Fourier representation is discrete and aperiodic 3. Fourier representation is continuous and periodic 4. Fouriere representation is discrete and periodic

37. A signal x(n) = sin(coon + (1)) is the input to a linear time-inveriant system having a frequency response H (en. If the output of the system Ax(n - ii0), then the most general form of LH(e) will be

38. A system with input x[n] and output y[n]=5 is given as y[n] = (sin -6 'A n) x(n). The system is

39. A 5-point sequence xln] is given as x1-31 = 1, xt-21 = 1, x1-11 = 0, x[0] = 5, x[1] = 1. Let x(eo) denote the discrete-time Fourier transform of xln]. The value of RI X(ei') dco is

40. The z-transform Xlzi of a sequence x[n] 0.5 is given by Xlz] = 1- 2z . It is given that the region of convergence of X[z] includes the unit circle. The value of x[0] is

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