Information Theory And Coding MCQ Questions & Answers

Information Theory And Coding MCQ Questions & Answers | ECE

Learn Information Theory And Coding MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Information Theory And Coding MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-7 section-2

Entropy is basically a measure of:

A) Rate of information B) Average information C) Probability of information D) Disorder of information

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Answer & Solution

Answer: Option B

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If a block code is to have a t-error correction capability then the minimum distance dmin of the code should be such that

A) d_min ≥ 2t B) d_min ≥ t C) d_min ≥ 2t + 1 D) d_min > 2t - 1

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Answer & Solution

Answer: Option C

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Channel capacity of Binary symmetric channel illustrated below is
Information Theory and Coding mcq question image

A) 1 + plog₂p + qlog₂q B) 1 + plog₂q + qlog₂p C) 0 D) 0.5

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Answer: Option A

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Consider a binary transmission of bits 0 and 1 with equal probability. Bits are transmitted in a noisy channel and channel noise is additive in nature. The received signal is random in nature with conditional probability density function for each transmitted bit 0 and 1, respectively, as
f_r/0(x) = 1 - |x||x| < 1
f_r/0(x) = 1 - |x - 1| 0 < x < 2
What is the average probability of error if threshold in the decision device at the receiving end is 1?

A) $$\frac{1}{3}$$ B) $$\frac{1}{2}$$ C) $$\frac{1}{8}$$ D) $$\frac{1}{4}$$

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Answer & Solution

Answer: Option D

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Channel capacity is equal to

A) Bandwidth of demand B) Average frequency C) Noise rate D) Amount of information per second

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Answer & Solution

Answer: Option D

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If a channel having bandwidth of 2 kHz and signal to noise ratio is zero dB. Maximum bit rate for this channel will be-

A) 0 kbps B) 0.5 kbps C) 4 kbps D) 2 kbps

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Answer: Option D

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The capacity of a band-limited additive white Gaussian noise (AWGN) channel is given by $$C = W{\log _2}\left( {1 + \frac{P}{{{\sigma ^2}W}}} \right)$$ bits per second (bps), where W is the channel bandwidth, P is the average power received and σ² is the one-sided power spectral density of the AWGN.
For a fixed $$\frac{P}{{{\sigma ^2}}} = 1000,$$ the channel capacity (in kbps) with infinite bandwidth $$\left( {W \to \infty } \right)$$ is approximately

A) 1.44 B) 1.08 C) 0.72 D) 0.36

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Answer & Solution

Answer: Option A

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Which one of the following is correct?

A) Coding reduces the noise in the signal B) Coding deliberately introduces redundancy into messages C) Coding increases the information rate D) Coding increases the channel bandwidth

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Answer: Option A

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For a fast communication which of the following requirements have to be met

A) Large bandwidth B) High S/N ratio C) High channel capacity D) None of the above

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Answer: Option C

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The entropy of a digital source is 2.7 bits/symbol. It is producing 100 different symbols per second. The source is likely to be which one of the following

A) A binary source B) A quaternary source C) An octal source D) A hexadecimal source

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Answer & Solution

Answer: Option C

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