Quiz-1: Introduction to Digital Communication

Who invented the Morse code used in telegraphy?

• Alexander Graham Bell

• Samuel Morse

• Guglielmo Marconi

• Claude Shannon

Morse code is an example of:

• Analog signal

• Digital signal

• Hybrid signal

• Continuous signal

Which of the following is NOT a part of the general communication system?

• Source

• Channel

• Receiver

• Transformer

The process of converting symbols into a suitable form for transmission is called:

• Decoding

• Encoding

• Multiplexing

• Modulation

Shannon's Source Coding Theorem deals with:

• Error correction

• Bandwidth reduction

• Data compression

• Noise elimination

Shannon's Channel Coding Theorem states that reliable communication is possible if:

• R > C

• R < C

• R = C

• None of the above

According to Shannon-Hartley theorem, channel capacity depends on:

• Bandwidth and Noise only

• Bandwidth and SNR

• Frequency and Amplitude

• Coding technique

In communication, simplex transmission means:

• One-way only

• Two-way, same time

• Two-way, alternate

• Both analog and digital

An analog signal is characterized by:

• Discrete time and amplitude

• Continuous time and amplitude

• Continuous time, discrete amplitude

• Random variations only

A digital signal is typically represented by:

• Infinite levels

• Discrete steps

• Sinusoids only

• Noise-free signals