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IGCSE CS Unit 2 quiz

Authored by Thomas Bui

Information Technology (IT)

9th Grade

Used 2+ times

IGCSE CS Unit 2 quiz
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10 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

These bytes are transmitted across a network and arrive without any errors. Does this parity block use odd or even parity?

odd

even

cannot be determined

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the benefits of using symmetric encryption?

Uses two keys, so it's more secure than asymmetric encryption.

Faster to compute than asymmetric encryption.

The private key does not need to be shared.

The public key is derived from the private key.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can checksums help in error detection?

Checksums are primarily used for data compression.

Checksums help in error detection by allowing verification of data integrity through comparison of calculated values.

Checksums can only detect changes in file size.

Checksums are used to encrypt data for security purposes.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the typical uses of USB in modern devices?


Wireless internet connectivity


Video streaming to TVs


Data transfer, device charging, and connecting peripherals.

Audio output for speakers

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a data packet?

A data packet is a formatted unit of data for transmission over a network.

A data packet is a type of computer virus.

A data packet is a physical device used for networking.

A data packet is a software application for data analysis.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Differentiate between serial and parallel transmission.

Serial transmission sends multiple bits at once; parallel transmission sends one bit at a time.

Serial transmission is faster than parallel transmission; parallel transmission is slower.


Parallel transmission is used for long distances; serial transmission is for short distances.

Serial transmission is one bit at a time; parallel transmission is multiple bits at once.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does USB stand for?

Universal Serial Bus

Universal System Bus

Universal Serial Connection

Unified Serial Bus

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