Chapter 5 : Pulse Modulation and Digital Transmission of Analog Signal

1	The more the path length for a signal to travel, the more is the attenuation and distortion. Is it correct?
	A)	Yes
	B)	No
2	For same performance analog signal requires less signal power compared to digital. Is it true?
	A)	Yes
	B)	No
3	Is it advisable to sample a single tone signal of frequency f with frequency 2f ?
	A)	Yes
	B)	No, > 2 f
4	Is it true that the sampling frequency for a bandpass signal need not be more than double the maximum frequency present in the signal?
	A)	Yes
	B)	No
5	Instantaneous sampling is not preferred as the sample energy becomes too low which makes it susceptible to noise. Is that correct?
	A)	Yes
	B)	No
6	Crosstalk can be suppressed but not avoided with samples of finite duration. Is that true?
	A)	Yes
	B)	No
7	Is it true that reduction in step size reduces quantization error?
	A)	Yes
	B)	No
8	Can the reduction of repeater distance in digital communication keep error arbitrarily low?
	A)	Yes
	B)	No
9	Is it true that a reduction in amplitude of input signal by a factor of 2 reduces Signal to Quantization noise ratio by 6 dB in mu-law companding?
	A)	Yes
	B)	No, in uniform quantization
10	The distortion caused by compressor is removed by expander in companding scheme. Is that correct?
	A)	Yes
	B)	No
11	The objective behind DPCM coding is to reduce the variance of the signal to be encoded. Is that correct?
	A)	Yes
	B)	No
12	Is it true that an FIR digital filter is always stable because its impulse response is finite?
	A)	Yes
	B)	No
13	The slope overload error in DM can be reduced by increasing (a) step size, (b) sampling frequency, (c) both. Which one is correct?
	A)	step size,
	B)	sampling frequency,
	C)	both. Which one is correct?
14	Is the step size in ADM variable?
	A)	Yes
	B)	No
15	Vocoders are different from waveform coders like PCM, DPCM as they emphasize on perceptual aspect of speech and not on faithful representation of waveform. Is that correct?
	A)	Yes
	B)	No
16	In LPC or Analysis by Synthesis system, encoder is such that it is able to hear how speech will sound at the decoder. How far is this true?
	A)	Yes
	B)	No
17	The codebook search is a major deterrent for fast implementation of CELP. Is that correct?
	A)	Yes
	B)	No