Pearson Edexcel GCSE Computer Science (1CP2)

Topic 1: Computational Thinking: revision quiz and key terms

Free practice for Topic 1: Computational Thinking in Pearson Edexcel GCSE Computer Science (1CP2). It covers: decomposition and abstraction, algorithms, and truth tables. Try the questions, then check the key terms.

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Question 1 · Multiple choice

How many possible rows does a truth table with three inputs have?

Question 2 · True or false?

Decomposition is breaking a complex problem down into smaller, more manageable subproblems.

Question 3 · Multiple choice

Which logic gate outputs 1 only when both of its inputs are 1?

Question 4 · True or false?

A binary search can be carried out on an unsorted list.

Question 5 · Multiple choice

Which algorithm checks each item in a list in turn until the target is found or the end of the list is reached?

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Key terms for Topic 1: Computational Thinking

Abstraction: Removing unnecessary detail from a problem to focus on what is important.
Binary search: Repeatedly divides a sorted list in half to locate a target value.
Bubble sort: Repeatedly compares adjacent items and swaps them if in the wrong order.
Decomposition: Breaking a problem down into smaller, more manageable subproblems.
Integer division: Returns only the whole number part of a division.
OR operator: Produces a true output when at least one input is true.
Subprogram: A named block of code that performs a specific task.
Truth table: A table showing the output of a logical expression for every possible combination of inputs.

What Topic 1: Computational Thinking covers

In RADevo this topic has a full topic test and a focused quiz for each part:

1.1 Decomposition and Abstraction
1.2 Algorithms
1.3 Truth Tables: Practice questions.

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