Practice Quiz in Digital and Data Communication Networks Part 19

Quiz in Digital and Data Communication Networks

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This is the Online Practice Quiz in Digital and Data Communication Networks Part 19 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 XIX of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 181. Converting analog signals to digital is done by sampling and ___________.

A. Quantizing

B. Companding

C. Pre – emphasis

D. Mixing

Question 182. In PCM, it converts the PAM sampled to parallel PCM codes

A. Analog-to-Digital converter

B. Digital-to-analog converter

C. Pre-emphasis circuit

D. Compander

Question 183. The fastest LAN topology is the

A. ring

B. bus

C. star

D. square

Question 184. Transmitting the data signal directly over the medium is referred to as

A. baseband

B. broadband

C. ring

D. bus

Question 185. Pulse width modulation may be generated

A. by differentiating pulse position modulation

B. with a monostable multivibrator

C. by integrating the signal

D. with a free running multivibrator

Question 186. The phase relationship between signaling elements for BPSK is the optimum signaling format and occurs only when two binary signal levels are allowed and when one signal is the exact negative of the other.

A. Antipodal signaling

B. Carrier recovery

C. Squaring loop

D. Phase referencing

Question 187. A quantizing is _______.

A. Multiplexer

B. Demultiplexer

C. A/D converter

D. D/A converter

Question 188. What is the result if the input of ADC is changing while performing conversion?

A. Aperture error

B. Overload distortion

C. Aliasing

D. Aperture distortion

Question 189. It involves converting standard logic levels to a form more suitable to telephone transmission lines

A. Transmission line encoding

B. Physical line encoding

C. Digital line encoding

D. Multiplexing

Question 190. Which of the following is not a benefit of spread spectrum?

A. Jam – proof

B. Security

C. Immunity of fading

D. Noise proof

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