Chapter 13 : Information Theory and Coding

1	Is it true that a greater amount of information is conveyed when the receiver correctly identifies a less likely message?
	A)	Yes
	B)	No
2	The average information rate is zero for both extremely likely and extremely unlikely message. Is the statement correct?
	A)	Yes
	B)	No
3	Is it true that average information is maximum when all the messages are equally likely?
	A)	Yes
	B)	No
4	Is it logical in source coding to assign less probable symbol longer string and more probable ones shorter?
	A)	Yes
	B)	No
5	Can average bits/message exceed average information per message interval?
	A)	Yes
	B)	No
6	Is coding efficiency of Shanon-Fano coding better than Huffman coding?
	A)	Yes
	B)	No
7	Can application of Shanon-Hartley theorem give lower bound of performance for non Gaussian channel?
	A)	Yes
	B)	No
8	Can there be a trade-off between signal to noise ratio and bandwidth in calculation of channel capacity?
	A)	Yes
	B)	No
9	The Shanon limit is practically not achieved as it requires extremely complicated communication system. Do you agree?
	A)	Yes
	B)	No
10	Does knowledge of output of a channel decrease uncertainty of input to channel?
	A)	Yes
	B)	No
11	Can we send information at a higher rate than channel capacity if certain amount of distortion is allowed?
	A)	Yes
	B)	No
12	Is it true that reduction of source entropy can lead to data compression?
	A)	Yes
	B)	No
13	Coding detects and corrects error by deliberate introduction of redundancy into messages. Is that true?
	A)	Yes
	B)	No
14	In coded signal, all sequences of symbols do not constitute bona fide message. Is the statement correct?
	A)	Yes
	B)	No
15	In block code generation, arithmetic product operation is replaced by Ex-OR and arithmetic addition is replaced by AND. Is that correct?
	A)	Yes
	B)	No, just opposite
16	Does soft decision decoding provide 2-3 dB improvement over hard decision decoding?
	A)	Yes
	B)	No
17	Does bandwidth restriction limits use of Hadamard code?
	A)	Yes
	B)	No
18	In systematic code, the coded message has original uncoded words followed by parity bits while in non systematic codes, it is not necessary. Do you agree?
	A)	Yes
	B)	No
19	Can fading channel cause burst error?
	A)	Yes
	B)	No
20	Is it true that convolutional interleaving requires less memory and offers more flexibility compared to block interleaving?
	A)	Yes
	B)	No
21	Is information feedback system (based on feedback communication system) suitable for analysis of communication between ground station and satellite?
	A)	Yes
	B)	No
22	In trellis-decoded modulation, can the sequence of events from one bit interval to the next bit interval be represented on a trellis diagram?
	A)	Yes
	B)	No