6The Fourier series represents a periodic signal as:AA step functionBA sum of sinusoids at multiples of the fundamental frequencyCA polynomialDA single impulseView AnswerDiscussWorkspaceReportSaveEasy
7Aliasing occurs when:AThe sampling rate is below twice the highest signal frequencyBThe signal is DCCThe signal is too slowDThe sampling rate is too highView AnswerDiscussWorkspaceReportSaveEasy
8An even signal satisfies:Ax(t) = x(t + 1)Bx(t) = 0Cx(t) = −x(−t)Dx(t) = x(−t)View AnswerDiscussWorkspaceReportSaveEasy
9The output of an LTI system is the input convolved with:AThe step inputBThe impulse responseCThe sampling functionDThe noiseView AnswerDiscussWorkspaceReportSaveEasy
10A system is time-invariant if:AIt is linearBIt has no memoryCIts output is always constantDA delay in the input causes the same delay in the outputView AnswerDiscussWorkspaceReportSaveEasy