GCSE Computer Science 2

Question 1

What is an algorithm?

Accepted Answer

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

Answer

An algorithm is a finite, ordered sequence of well-defined instructions used to solve a problem or complete a task.

Question 2

Which of the following best describes a 'for loop' in programming?

Accepted Answer

It executes a block of code a specific number of times

Answer

A for loop iterates a block of code a predetermined number of times, controlled by a counter variable.

Question 3

What does 'decomposition' mean in computational thinking?

Accepted Answer

Breaking a complex problem into smaller, more manageable sub-problems

Answer

Decomposition is the process of breaking a large, complex problem into smaller parts that are easier to understand and solve.

Question 4

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

Accepted Answer

Bubble Sort

Answer

Bubble sort passes through the list repeatedly, swapping neighboring elements until the entire list is sorted.

Question 5

What is an array in programming?

Accepted Answer

A data structure that stores multiple values of the same type under one name

Answer

An array stores a collection of elements of the same data type, accessed using an index.

GCSE - General Certificate of Secondary Education Practice Test