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

A type of programming language

Answer

A piece of computer hardware

Answer

A method of storing data in a database

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

It runs indefinitely until manually stopped

Answer

It only executes if a condition is true at runtime

Answer

It is used exclusively to define new functions

Question 3

What does 'decomposition' mean in computational thinking?

Accepted Answer

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

Answer

Finding repeating patterns in a data set

Answer

Writing pseudocode before real code

Answer

Combining multiple sorting algorithms

Question 4

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

Accepted Answer

Bubble Sort

Answer

Merge Sort

Answer

Insertion Sort

Answer

Quick Sort

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

A single variable holding one value at a time

Answer

A type of conditional statement

Answer

A loop that iterates over characters in a string

Question 6

What is the purpose of using functions (subroutines) in a program?

Accepted Answer

To group reusable blocks of code that can be called multiple times

Answer

To make programs run slower for testing

Answer

To prevent the use of variables

Answer

To store data permanently on disk

Question 7

What is the output of the following pseudocode?
  x ← 10
  x ← x * 2
  x ← x - 5
  OUTPUT x

Accepted Answer

15

Answer

10

Answer

20

Answer

5