31.
A source produces 4 symbols with probability $$\frac{1}{2},\frac{1}{4},\frac{1}{8}$$   and $$\frac{1}{8}$$  For this source, a practical coding scheme has an average codeword length of 2 bits/symbols. The efficiency of the code is

35.
A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is

37.
Which among the below stated logical circuits are present in encoder and decoder used for the implementation of cyclic codes?
1. Shift Registers
2. Modulo-2 Adders
3. Counters
4. Multiplexers

40.
According to Shannon's second theorem, it is not feasible to transmit information over the channel with . . . . . . . . error probability, although by using any coding technique.

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