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Digital Communication System MCQs

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Practice free Digital Communication System multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 252 questions — no login required.

Question 19easy

A binary system linking teletypewriters to a computer operates at a mean frequency of 1080 Hz shifting to 980 Hz when a one is transmitted and to 1180 Hz for a zero. The maximum permitted data rate for this system is

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Question 20easy

For transmission of normal speech signal, the PCM channel needs a bandwidth of kHz.

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Question 21easy

The duty cycle of a rectangular voltage waveform which has mark-to-space (MIS) ratio of 0.5 is

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Question 22easy

Frequency frogging is used in carrier system to

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Question 23easy

A matching stub should be