ICAS Programming and Digital Systems 5

Question 1

What is an 'array' in programming?

Accepted Answer

A collection of elements stored under one name

Answer

An array is a data structure that stores multiple values of the same type under a single variable name, accessed by index.

Question 2

Which of the following describes 'open source' software?

Accepted Answer

Software whose source code is freely available to view and modify

Answer

Open source software has its source code publicly available, allowing anyone to view, use, and modify it.

Question 3

What does 'HTTP' stand for in web technology?

Accepted Answer

HyperText Transfer Protocol

Answer

HTTP stands for HyperText Transfer Protocol, which governs how data is transferred between web browsers and servers.

Question 4

What is the output of: 5 + 3 * 2 in most programming languages?

Accepted Answer

11

Answer

Due to operator precedence, multiplication is performed before addition: 3 × 2 = 6, then 5 + 6 = 11.

Question 5

Which of the following best describes 'encryption'?

Accepted Answer

Converting data into a coded format to prevent unauthorized access

Answer

Encryption transforms readable data (plaintext) into a scrambled format (ciphertext) that can only be decoded with the correct key.

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