Chapter 1 : Introduction : Signal and Spectra

1	Is modulation done at transmitter end while demodulation at receiver end?
	A)	Yes
	B)	No
2	Can regenerative repeater be used in analog communication?
	A)	Yes
	B)	No
3	Is channel capacity related to SNR?
	A)	Yes
	B)	No
4	Complex signal is characterized by both magnitude and phase while real signal carries only magnitude information. Is it correct?
	A)	Yes
	B)	No
5	Does Dirichlet’s condition require a signal to be absolutely integrable?
	A)	Yes
	B)	No
6	In Fourier series expansion, for even function Bn will be zero and for odd function An will be zero. Is it true?
	A)	Yes
	B)	No
7	Does compression in time domain lead to compression in frequency domain?
	A)	Yes
	B)	No
8	For a linear system, sinusoidal excitation retains its shape and frequency. Is it true?
	A)	Yes
	B)	No
9	Can DFT be considered as a digital representation of frequency information?
	A)	Yes
	B)	No
10	Are autocorrelation function and energy.(aperiodic signal)/power.(periodic signal) spectral density Fourier transform pair?
	A)	Yes
	B)	No
11	Is it a necessary requirement for orthogonality to have zero scalar product?
	A)	Yes
	B)	No
12	Gram-Schmidt procedure allows to develop a finite orthogonal set to represent a finite number of function. Is it true?
	A)	Yes
	B)	No