Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 112
Q1581:
Which frequency range does NOT match the listed wave type?
A. 3 kHz–1 GHz: Radio waves
B. 1 GHz–300 GHz: Microwaves
C. 300 GHz–3 THz: Microwaves
D. 1 GHz–300 GHz: Radio waves
Correct Answer:
D
Chapter: 113
Q1582:
What is the frequency range of microwaves?
A. 300 kHz to 3 MHz
B. 3 kHz to 300 kHz
C. 1 GHz to 300 GHz
D. 300 GHz to 400 THz
Correct Answer:
C
Chapter: 113
Q1583:
Microwaves are considered ______ in nature.
A. Bidirectional
B. Multidirectional
C. Unidirectional
D. Omnidirectional
Correct Answer:
C
Chapter: 113
Q1584:
Which type of wave can be narrowly focused using an antenna?
A. Infrared
B. Microwave
C. Radio
D. X-ray
Correct Answer:
B
Chapter: 113
Q1585:
Which of the following is TRUE about microwave communication?
A. Microwaves cannot be directed
B. Microwaves are randomly broadcast
C. Microwaves can be narrowly focused
D. Diffuse scattering occurs
Correct Answer:
B
Chapter: 113
Q1586:
What type of antenna is used to transmit focused microwave signals?
A. Omnidirectional
B. Parabolic
C. Dipole
D. Whip
Correct Answer:
B
Chapter: 113
Q1587:
Infrared waves fall in which frequency range?
A. 3 kHz to 30 MHz
B. 1 GHz to 300 GHz
C. 300 GHz to 400 THz
D. 400 THz to 700 THz
Correct Answer:
C
Chapter: 113
Q1588:
Which of the following statements is true about infrared waves?
A. They are used for long-range communication
B. They can be used for short-range communication
C. They penetrate walls easily
D. They operate below 1 GHz
Correct Answer:
B
Chapter: 113
Q1589:
Fill in the blank: ______ communication uses high frequency waves that cannot penetrate walls.
A. Microwave
B. Infrared
C. Radio
D. X-ray
Correct Answer:
B
Chapter: 113
Q1590:
Which wave type is ideal for controlling interference between nearby systems?
A. Microwaves
B. Radio waves
C. Infrared waves
D. Gamma rays
Correct Answer:
C
Chapter: 113
Q1591:
Infrared waves have wavelengths ranging from ______.
A. 770 nm to 10 cm
B. 770 nm to 1 mm
C. 1 mm to 10 m
D. 700 nm to 900 nm
Correct Answer:
B
Chapter: 113
Q1592:
What is the advantage of infrared waves not penetrating walls?
A. It increases range
B. It allows multipath propagation
C. It reduces interference
D. None of these
Correct Answer:
C
Chapter: 113
Q1593:
Which of the following uses infrared communication?
A. Bluetooth
B. Wi-Fi
C. TV remote control
D. Radio transmitter
Correct Answer:
C
Chapter: 113
Q1594:
Unidirectional antennas are useful because they ______.
A. Transmit signals in all directions
B. Absorb noise from all sides
C. Focus energy in a single direction
D. Use multiple frequency bands
Correct Answer:
C
Chapter: 113
Q1595:
What is one benefit of microwave’s unidirectional property?
A. Higher latency
B. Higher noise
C. Focused transmission
D. Wall penetration
Correct Answer:
C
Chapter: 113
Q1596:
Fill in the blank: ______ waves are typically blocked by obstacles like walls, making them suitable for isolated room communication.
A. Microwaves
B. Infrared
C. Radio waves
D. Gamma rays
Correct Answer:
B
Chapter: 113
Q1597:
Which type of waves are best suited for use within a single room?
A. Microwaves
B. Infrared
C. X-rays
D. UV rays
Correct Answer:
B
Chapter: 113
Q1598:
Microwaves are unidirectional. What does that imply?
A. They spread in all directions
B. They need no antenna
C. They travel in one direction only
D. They reflect off walls
Correct Answer:
C
Chapter: 114
Q1599:
What is a network?
A. A single device
B. An isolated computer
C. A group of connected devices
D. A storage system
Correct Answer:
C
Chapter: 114
Q1600:
What is the main challenge when trying to connect multiple devices in a network?
A. Storing data
B. Transmitting power
C. Making one-to-one communication possible
D. Installing software
Correct Answer:
C