
Digital Communication Systems Assessment
Quiz
•
Engineering
•
University
•
Practice Problem
•
Easy
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the main elements of a digital communication system?
Modem, Router, Firewall, Switch
Signal, Noise, Protocol, Bandwidth
Source, Transmitter, Channel, Receiver, Destination
Encoder, Decoder, Amplifier, Filter
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
List two advantages of digital communication systems.
Limited range of communication
Lower cost of hardware
1. Increased speed of data transmission, 2. Improved reliability through error correction.
Simplified user interface
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is pulse code modulation (PCM)?
A method for amplifying analog signals
A technique for compressing digital audio files
A way to convert digital signals into analog waves
Pulse Code Modulation (PCM) is a technique for digitally representing analog signals by sampling and quantizing their amplitudes.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the process of sampling in PCM.
Sampling in PCM requires continuous sampling of the signal without intervals.
Sampling in PCM involves taking discrete samples of an analog signal at regular intervals and quantizing these samples to create a digital representation.
PCM sampling involves converting digital signals back to analog form.
Quantization in PCM is done before sampling the analog signal.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is quantization error in PCM?
Quantization error is the process of converting digital signals to analog.
Quantization error is the total error in the PCM system.
Quantization error is the difference between the actual analog signal value and the quantized value in PCM.
Quantization error is the noise introduced during signal transmission.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define companding in PCM systems.
Companding is a method to increase the bit rate in PCM systems.
Companding is a technique in PCM systems that compresses and expands audio signals to reduce dynamic range and improve signal quality.
Companding refers to the process of filtering out noise in audio signals.
Companding is a technique used to convert analog signals to digital without any compression.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is differential Pulse Code Modulation?
A technique for compressing audio files without any loss of quality.
Differential Pulse Code Modulation (DPCM) is a method of encoding signals by transmitting the difference between successive samples.
A process that involves sampling signals at a constant rate.
A method of encoding signals by transmitting the sum of successive samples.
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