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Try this quiz based on GCSE Computer Science past papers. Choose the topic you would like to revise and answer the questions.

Get ready for your AQA computer science GCSE exams with free interactive tests and feedback to improve your knowledge of binary, programming techniques and more.

Free interactive AQA computer science GCSE questions based on past papers. Boost your knowledge of algorithms, computer systems, data structures and more.

Algorithms are step-by-step plans for solving problems. They can be designed using pseudo-code and flowcharts.

Sorting and searching are two of the most frequently needed algorithms in program design. These algorithms have evolved to take account of this need.

Programs are designed using common building blocks, known as programming constructs. These programming constructs form the basis for all programs.

Proficient programming requires knowledge of many techniques. These techniques allow for powerful, complex programs to be created.

Proficient programming requires knowledge of many techniques. These techniques allow for powerful, complex programs.

All data is represented as binary digits, whether it is numbers, text, images or sound. Calculations are also made in binary.

At the simplest level, computers are little more than a collection of transistors and circuits. They connect together to form logic gates, which in turn are used to form logic circuits.

High-level languages allow programmers to write instructions in a language that is easier to understand than low-level languages. Translators translate programs written in high-level languages into the machine code that a computer understands.

Computer systems are a combination of both hardware and software working together. Hardware is the physical components of a computer and software is the programs that run on a computer.

Networking computers brings many benefits to users. Without networking, many computing applications would not be possible.

Networks can be arranged in different topologies. Encryption is used to ensure that messages can be sent securely over a network.

Computer systems are at risk of intrusion, theft, and deletion. Cybercrime is evolving at the same rate as the technology around us.

The use of computers has brought about ethical, legal and environmental impacts. These issues increasingly affect people's daily lives.

Every programming problem needs decomposing so that it can be properly understood. From this, an algorithm can be designed and tested.

Essay-style questions are worth a lot of marks. They test not only understanding, but whether or not your knowledge and understanding can be put into a coherent argument.