Information Theory And Coding - Study Mode

Show All Answers

[#211] . . . . . . . . is the average amount of information that must be delivered in order to resolve the uncertainty about the outcome of a trial.

(A) Bandwidth

(B) Entropy

(C) Quantum

(D) Loss

Correct Answer

(B) Entropy

[#212] A prefix code is . . . . . . . . decodable and satisfies . . . . . . . . inequality.

(A) Always, Schwartz

(B) Always, Kraft-McMilan

(C) Sometimes, Schwartz

(D) Sometimes, Kraft-McMilan

Correct Answer

(B) Always, Kraft-McMilan

[#213] The minimum transmitter power requirement in the absence of channel coding of a communication system is 2 W. If a channel coding scheme of 3 dB is incorporated in the system, the minimum required transmitter power is

(A) 2 dB

(B) 3 dB

(C) 1 dB

(D) 6 dB

Correct Answer

(B) 3 dB

[#214] A communication system is used to transmit one of 16 possible signals. Assume that transmission is accomplished by encoding the signals into binary digits. Further assume that signals are equally likely to occur. If each binary digit requires 1µ sec. For transmission, then how much information (in bits) is transmitted by the system in 8 microseconds?

(A) 8

(B) 16

(C) 4

(D) 2

Correct Answer

(D) 2

[#215] The average information associated with an extremely unlikely message is zero. What is the average information associated with an extremely likely message?

(A) Zero

(B) Infinity

(C) Depends on speed of transmission of the message

(D) Depends on total number of messages

Correct Answer

(D) Depends on total number of messages