OCRComputer ScienceExam Board Revision

OCR Computer Science Hardware Revision Notes

Master OCR 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 that you can touch and see. It includes everything from the central processing unit (CPU) to input and output devices like keyboards and monitors.

Key Concepts

  • 1The CPU is the brain of the computer, responsible for processing instructions.
  • 2Memory (RAM) temporarily stores data and instructions for quick access.
  • 3Storage devices (HDD, SSD) are used to save data permanently.
  • 4Input devices allow users to interact with the computer, while output devices display results.
  • 5Motherboards connect all hardware components and allow communication between them.

Simple Explanation

Hardware is all the physical parts of a computer that you can see and touch. This includes the CPU, which processes information, and memory, which stores data temporarily. There are also storage devices that keep your files long-term, and various input and output devices that let you interact with the computer. Together, these components work to make the computer function properly.

Memory Trick

“Think of a computer as a human body: the CPU is the brain, RAM is short-term memory, storage is long-term memory, input devices are senses, and output devices are actions or communications.”

Flashcards

Question1 / 5

What does CPU stand for?

Tap to reveal answer

Exam Questions

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

6 marks
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Explain how the CPU processes instructions and how RAM stores data temporarily for quick access.

Explain how storage devices differ from memory in a computer. [4 marks]

4 marks
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Discuss the permanence of data storage and the volatility of memory.

What is meant by the term 'motherboard'? [2 marks]

2 marks
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Define the motherboard and its role in connecting hardware components.

Practice Quiz

Question 1 of 5Score: 0

What is the main function of the CPU?

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