Cambridge International AS Level · Computer Science (9618)

Security, privacy and data integrity: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Security, privacy and data integrity.

10 questions22 marksFree, no account

Question 1

1 mark

A user receives an email that appears to be from their bank, asking them to click a link and enter their login credentials. What type of security threat is this?

Question 2

1 mark

In the context of data transfer, a checksum is used to:

Question 3

1 mark

Which statement best describes the difference between data privacy and data security?

Question 4

1 mark

A database administrator uses access rights to ensure that junior staff can only view records, while senior managers can edit them. This is a measure to protect which of the following?

Question 5

1 mark

A website redirects a user to a fraudulent site even though the user typed the correct URL into their browser. This is an example of which security threat?

Question 6

2 marks

Explain the difference between data security and data privacy.

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Question 7

3 marks

A data packet consisting of the binary value \(1011001\) is sent using even parity. Identify the value of the parity bit that must be appended to the data.

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Question 8

5 marks

A checksum is used to detect errors during the transfer of a large file. Explain the process of how the checksum is used to verify the integrity of the data once it has been received.

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Question 9

3 marks

Validation and verification are both used to protect the integrity of data.

a) Define data validation.
b) A system requires a user to enter a new employee ID which must be exactly 6 characters long and start with the letter 'E'. Identify two specific validation checks that should be performed on this input.

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Question 10

4 marks

Data transmission often utilizes parity checks to detect errors.

a) Explain how a parity block (2D parity) can detect and correct a single-bit error, whereas a simple parity bit can only detect an error.
b) If an even parity scheme is used for the byte \(1011001x\), what must the value of the parity bit \(x\) be?

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