Practice Quiz in Digital and Data Communication Networks Part 27

(Last Updated On: December 20, 2017)

Quiz in Digital and Data Communication Networks

This is the Online Practice Quiz in Digital and Data Communication Networks Part 27 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 XXVII of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 261. To a conventional narrowband receiver, a spread spectrum signal appears to be like

A. Noise

B. Fading

C. A jamming signal

D. An intermittent connection


Question 262. It is the most prevalent encoding technique used for TDM signals

A. PAM

B. PLM

C. PPM

D. PCM


Question 263. It is the transmittal of digital signals between to or more points in a communication system.

A. Digital transmittal

B. Digital communications

C. Digital radio

D. Data communications


Question 264. It is simply the number of bits transmitted during one second and expressed in bits per second

A. baud

B. bits

C. bit rate

D. pulse repetition rate


Question 265. He is credited with inventing PCM in 1937

A. N. S. Kapany

B. A. H. Reeves

C. E. H. Alpine

D. A. C. S. Van Heel


Question 266. It is logically equivalent to making telephone call through the DDD network except no direct end-to-end connection is made

A. Normal call

B. Completed call

C. Logical call

D. Virtual call


Question 267. A QAM modulator does not use _______.

A. XNOR

B. Bit Splitter

C. Balanced modulator

D. 2-to-4 level converter


Question 268. If the active time of the binary pulse is less than 100% of the bit time

A. Non return to zero

B. Bipolar

C. Unipolar

D. Return to zero


Question 269. It is a form of phase-division multiplexing where two data channels modulate the same carrier frequency that is shifted 90 degrees in phase.

A. PSK

B. FSK

C. QAM

D. ASK


Question 270. The most common modulation system used for telegraphy is

A. frequency-shift keying

B. two-tone modulation

C. pulse-code modulation

D. single-tone modulation

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Practice Quiz in Digital and Data Communication Networks Part 27
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