Practice Quiz in Digital and Data Communication Networks Part 23

Quiz in Digital and Data Communication Networks

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This is the Online Practice Quiz in Digital and Data Communication Networks Part 23 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 XXIII of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 221. It is the ratio of the average carrier power to the thermal noise power

A. Signal-to-noise ratio

B. Noise figure

C. Noise factor

D. Carrier-to-noise ratio

Question 222. One eight-bit PCM code is called ______.

A. FDM frame

B. TDM time slot

C. TDM frame

D. FDM time slot

Question 223. The modulation system inherently most noise-resistant is

A. SSB, suppressed carrier

B. frequency modulation

C. pulse-position modulation

D. pulse-code modulation

Question 224. In digital modulation, it is similar to standard amplitude modulation except there is only two amplitudes possible

A. frequency shift keying

B. quaternary amplitude modulation

C. amplitude shift keying

D. phase shift keying

Question 225. Data communications uses

A. Analog methods

B. Digital methods

C. All of these

D. None of these

Question 226. Quadrature amplitude modulation is

A. Amplitude modulation only

B. QPSK only

C. AM plus QPSK

D. AM plus FSK

Question 227. An integrated circuit that performs the PCM encoding and decoding functions

A. Codec

B. Modem

C. Muldem

D. Digital-to-analog converter

Question 228. Which of the following is not commonly used method of error detection?

A. Parity

B. BCC

C. CRC

D. redundancy

Question 229. A signaling element is sometimes called

A. information

B. data

C. symbol

D. intelligence

Question 230. Slow speed modems

A. FSK

B. BPSK

C. QPSK

D. QAM

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