Data Communication — Important Questions
Bihar Board · Class 12 · Computer Science
50 important questions from Data Communication for Bihar Board Class 12 Computer Science, with answers. Written for the board exams 2027.
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Important Questions from Data Communication
Which of the following are examples of guided transmission media?
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Twisted pair cable, Coaxial cable, Optical fiber cable
Guided transmission media use physical cables/wires. Twisted pair, coaxial, and optical fiber are all physical cables. Radio waves and microwaves are unguided (wireless) media.
In circuit switching, what happens before communication starts?
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A dedicated path is established
In circuit switching, a dedicated path is identified and established between sender and receiver before communication starts. All data follows this same path.
Which wireless technology is used for short-range communication within 10 meters?
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Bluetooth
Bluetooth is a short-range wireless technology that works within 10 meters, used to connect devices like phones, headphones, keyboards, etc.
Which mobile generation first introduced digital voice transmission?
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2G
2G mobile networks introduced digital voice transmission instead of analog signals used in 1G. This provided better call quality and enabled SMS services.
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