Practice Quiz in Digital and Data Communication Networks Part 26

Quiz in Digital and Data Communication Networks

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This is the Online Practice Quiz in Digital and Data Communication Networks Part 26 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part XXVI of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 251. Which of the following is not a benefit of companding

A. minimizes noise

B. minimizes number of bits

C. minimizes quantizing error

D. minimizes signal bandwidth

Question 252. It is the modulating signal in a communications system

A. Broadband

B. Baseband

C. Carrier

D. Any of these

Question 253. A convenient technique for determining the effects of the degradations introduced into the pulses as they travel to the regenerator.

A. Standing wave ratio

B. Eye patterns

C. Reflection coefficient

D. Any of these

Question 254. Type of analog companding used in the United States and Japan

A. log-PCM companding

B. A-law companding

C. u-law companding

D. Any of these

Question 255. In digital modulation, if the information signal is digital and the amplitude of the carrier is varied proportional to the information signal.

A. Quaternary Shift Keying (QAM)

B. Phase Shift Keying (PSK)

C. Frequency Shift Keying (FSK)

D. Amplitude Shift Keying (ASK)

Question 256. Indicate which of the following is not a binary code

A. Morse

B. Baudot

C. CCITT-2

D. ARQ

Question 257. A common method of achieving carrier recovery for BPSK

A. Trellis code

B. Bandwidth efficiency

C. Squaring loop

D. Carrier recovery

Question 258. In TDM, multiple signals

A. share a common bandwidth

B. modulate subcarriers

C. are sampled at high speeds

D. take turns transmitting

Question 259. Digital signals may be transmitted over the telephone network if

A. their speed is low enough

B. they are converted to analog first

C. they are ac instead of dc

D. they are digital only

Question 260. Type of multiplexing where multiple sources that originally occupied the same frequency spectrum are each converted to a different frequency band and transmitted simultaneously over a single transmission medium.

A. FDM

B. ATM

C. TDM

D. Spread spectrum

List of Practice Quizzes

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