Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 111
Q1561:
Which of the following is a key feature of unguided media?
A. Private transmission
B. Use of twisted pair cables
C. Signal confinement
D. Signal availability to anyone with a receiver
Correct Answer:
D
Chapter: 111
Q1562:
Fill in the blank: ______ medium does not require any physical conductor for data transmission.
A. Guided
B. Copper
C. Unguided
D. Optical
Correct Answer:
C
Chapter: 111
Q1563:
Which of the following is an example of unguided media?
A. Twisted pair cable
B. Fiber-optic cable
C. Radio waves
D. Coaxial cable
Correct Answer:
C
Chapter: 111
Q1564:
Unguided transmission is most suitable for which environment?
A. Submarine communication
B. Cabled LANs
C. Open outdoor communication
D. Industrial control systems
Correct Answer:
C
Chapter: 111
Q1565:
Which device is required to receive signals from unguided media?
A. Router
B. Receiver device
C. Switch
D. Hub
Correct Answer:
B
Chapter: 111
Q1566:
Fill in the blank: In unguided media, the signal is transmitted through the ______.
A. network cable
B. air or vacuum
C. twisted pair
D. conductor
Correct Answer:
B
Chapter: 111
Q1567:
Which of the following is NOT a characteristic of wireless communication?
A. Signal availability to all receivers
B. Use of guided cables
C. Free-space propagation
D. No physical medium
Correct Answer:
B
Chapter: 111
Q1568:
Wireless signals can be received by ______.
A. Only wired LAN users
B. Any compatible device with a receiver
C. Only main servers
D. Only private networks
Correct Answer:
B
Chapter: 112
Q1569:
Electromagnetic waves with frequencies between 3 kHz and 1 GHz are called ______.
A. Microwaves
B. Radio waves
C. Infrared rays
D. X-rays
Correct Answer:
B
Chapter: 112
Q1570:
Electromagnetic waves with frequencies between 1 GHz and 300 GHz are known as ______.
A. Radio waves
B. Microwaves
C. Gamma rays
D. UV rays
Correct Answer:
B
Chapter: 112
Q1571:
Fill in the blank: ______ waves are commonly used for AM and FM broadcasting.
A. Microwave
B. Radio
C. Light
D. Infrared
Correct Answer:
B
Chapter: 112
Q1572:
Which of the following is a correct frequency range for microwaves?
A. 3 Hz to 3 kHz
B. 300 GHz to 3 THz
C. 1 GHz to 300 GHz
D. 3 kHz to 300 MHz
Correct Answer:
C
Chapter: 112
Q1573:
Which type of wave is generally used in satellite communication and radar?
A. Radio waves
B. Microwaves
C. Sound waves
D. Infrared
Correct Answer:
B
Chapter: 112
Q1574:
Radio waves have a frequency range of ______.
A. 1 GHz to 300 GHz
B. 300 MHz to 3 GHz
C. 3 kHz to 1 GHz
D. 30 GHz to 300 GHz
Correct Answer:
C
Chapter: 112
Q1575:
Fill in the blank: ______ are used in applications such as television and mobile communications.
A. Microwaves
B. Radio waves
C. X-rays
D. Gamma rays
Correct Answer:
B
Chapter: 112
Q1576:
Microwaves are primarily used in which of the following applications?
A. Broadcast radio
B. Mobile communication and radar
C. Power line transmission
D. Sound recording
Correct Answer:
B
Chapter: 112
Q1577:
Which of the following statements is true about electromagnetic waves?
A. Radio waves are higher in frequency than microwaves
B. Microwaves have lower frequencies than radio waves
C. Radio waves and microwaves are both electromagnetic waves
D. Microwaves are not used in communication
Correct Answer:
C
Chapter: 112
Q1578:
Which electromagnetic wave is used in GPS systems?
A. Radio waves
B. Microwaves
C. Infrared waves
D. X-rays
Correct Answer:
B
Chapter: 112
Q1579:
Fill in the blank: ______ waves are suitable for short-distance point-to-point communication like Bluetooth and Wi-Fi.
A. Radio
B. Microwave
C. Infrared
D. Sound
Correct Answer:
C
Chapter: 112
Q1580:
Microwaves are different from radio waves in terms of ______.
A. Frequency range
B. Propagation speed
C. Medium used
D. Color
Correct Answer:
A