Practice Quiz in Digital and Data Communication Networks Part 14

(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 14 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 XIV of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 131. A transmission of binary data which involves the transmission of two non – zero voltage level.

A. Unipolar

B. Polar

C. Bipolar

D. Non – return to zero

Question 132. Sampling technique that when the tops of the sample pulses retain their natural shape during the sample interval

A. unnatural sampling

B. flat top sampling

C. natural sampling

D. free sampling

Question 133. A modulation technique where data rates in excess of 56 kbps can be achieved over telephone circuits


B. Trellis Code Modulation


D. Any of these

Question 134. It is a process of converting an infinite number of possibilities to a finite number of conditions.

A. Sampling

B. Coding

C. Quantization

D. Aliasing

Question 135. It is defined as the process of transforming messages or signals in accordance with a definite set of rules.

A. Quantizing

B. Sampling

C. Coding

D. Decoding

Question 136. The Basic Rate Interface (BRI) of ISDN has a total bit rate of _____.

A. 192 kbps

B. 148 kbps

C. 64 kbps

D. 1.544 Mbps

Question 137. The main circuit in a PSN generator is ____.


B. Multiplexer

C. Shift register

D. Mixer

Question 138. A LAN device that is used to interconnect two networks that use different protocols and formats.

A. Gateways

B. Routers

C. Bridges

D. Hubs

Question 139. Bit errors in data transmission are usually caused by

A. equipment failures

B. typing mistakes

C. noise

D. poor S/N ratio at receiver

Question 140. Which of the following is not a LAN?

A. PBX system

B. Hospital system

C. Office building system

D. Cable TV system

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