GCSE GCSE Computer Science 2

Question 1

What is an algorithm?

Accepted Answer

A step-by-step set of instructions to solve a problem

Answer

An algorithm is a precise, ordered set of instructions designed to solve a specific problem or perform a task.

Question 2

Which sorting algorithm works by repeatedly swapping adjacent elements that are in the wrong order?

Accepted Answer

Bubble sort

Answer

Bubble sort repeatedly compares and swaps neighbouring elements until the entire list is in the correct order.

Question 3

What does 'iteration' mean in the context of programming?

Accepted Answer

Repeating a block of code

Answer

Iteration refers to the repetition of a block of code, typically implemented using loops such as for or while.

Question 4

In Python, which operator is used for integer (floor) division?

Accepted Answer

//

Answer

The // operator in Python performs integer division, dividing and discarding any remainder to return a whole number.

Question 5

What is a subroutine in programming?

Accepted Answer

A named block of code that can be called multiple times

Answer

A subroutine is a named, reusable block of code that performs a specific task and can be called from anywhere in a program.

GCSE Revision Practice Test