AQAComputer ScienceExam Board Revision

AQA Computer Science Hardware Revision Notes

Master AQA Computer Science Hardware using simple revision notes, key facts and practice questions — all generated by AI for your exam.

Hardware refers to the physical components of a computer system. It includes everything from the central processing unit (CPU) to storage devices, input/output devices, and the motherboard.

Key Concepts

  • 1The CPU is the brain of the computer, executing instructions and processing data.
  • 2Memory (RAM) temporarily stores data for quick access by the CPU.
  • 3Storage devices (HDDs, SSDs) provide long-term data storage.
  • 4Input devices (keyboard, mouse) allow users to interact with the computer.
  • 5Output devices (monitor, printer) display or produce the results of computer processes.

Simple Explanation

Computer hardware is all the physical parts that make up a computer. This includes the CPU, which processes information, RAM, which holds data temporarily, and storage devices like hard drives that keep your files. Input devices let you control the computer, while output devices show you the results of what the computer does.

Memory Trick

“Remember 'C-MIS' for Computer Hardware: C for CPU, M for Memory, I for Input devices, S for Storage, and O for Output devices.”

Flashcards

Question1 / 5

What does CPU stand for?

Tap to reveal answer

Exam Questions

Describe and explain the role of the CPU in a computer system. [6 marks]

6 marks
View mark scheme hint▾

Include functions like fetching, decoding, executing instructions and the role of the control unit and ALU.

Explain how RAM affects the performance of a computer. [4 marks]

4 marks
View mark scheme hint▾

Discuss the relationship between RAM size and multitasking, as well as speed of access.

What is meant by non-volatile memory? [2 marks]

2 marks
View mark scheme hint▾

Define non-volatile memory and give examples like SSDs or ROM.

Practice Quiz

Question 1 of 5Score: 0

What is the main function of the CPU?

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