
MCQ Set – Communication Systems
Authored by Ngu Hlaing
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To accurately sample an analog signal with a maximum frequency of 5 kHz, what is the minimum sampling rate required?
2.5 kHz
5 kHz
10 kHz
20 kHz
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a disadvantage of increasing the sampling rate significantly beyond the Nyquist rate?
Improved signal quality
Increased data storage and processing requirements
Simplified anti-aliasing filter design
Better time resolution of signal
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is modulation essential when transmitting low-frequency signals such as voice?
To eliminate quantization noise
To allow efficient transmission and reduce antenna size
To remove aliasing
To reduce jitter
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Using a higher carrier frequency in modulation helps reduce antenna size because:
The signal strength increases with frequency
Higher frequencies penetrate obstacles better
Wavelength decreases, allowing smaller antennas
It avoids intersymbol interference
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an advantage of Differential Pulse Code Modulation (DPCM) over standard PCM?
Lower compression efficiency
Reduced bit rate due to predictive encoding
Higher data redundancy
Higher error propagation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Intersymbol Interference (ISI) primarily occurs due to:
Incorrect modulation scheme
Overlapping of symbols caused by multipath propagation
Poor analog-to-digital conversion
Low quantization resolution
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a common cause of ISI in indoor wireless communication?
High transmission power
Multipath reflections from walls and objects
Low sampling rate
Antenna misalignment
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