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8th Computer Science Chapter 2 Test MCQs With Answers

Question # 1

PSTN or satellite links are....... devicesused for WAN.

Choose an answer

Deleting

Storing

Communication

All of these

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Question # 2

A ---------- is the data to be sent.

Choose an answer

Sender

Message

Receiver

None of these

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Question # 3

An unguided transmission media transmits elecromagnetic waves without using any ........medium.

Choose an answer

Social

Physical

Both

None of these

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Question # 4

------- is the unit of frequency.

Choose an answer

Meter

Hertz

Joule

None of these

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Question # 5

A ------------ network is a radio network distributed over a vast area through hexagonal cell

Choose an answer

Li-Fi

Wi-Fi

Satellite

Cellular

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Question # 6

The-------------- spectrum has frquencies between 300 GHz and 400 THz.

Choose an answer

Infrared

Radio waves

Micro waves

None of these

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Question # 7

------------ consists of a signle copper wire surrounded by at least three layers.

Choose an answer

Fiber optic cable

Coaxial cable

Twisted pair cable

None of these

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Question # 8

Which of the following is not the component of data communication system.

Choose an answer

Message

Sender

Protocol

Transmission Media

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Question # 9

A ............. network is an internet connection that is shared with multiple devices in a home or business via a wireless router.

Choose an answer

LiFi

WiFi

GPS

Router

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Question # 10

Number of waves passing through an area per unit time is called.

Choose an answer

VPN

Router

Bridge

Frequency

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