Year 10 - Computing
Main memory
Computer Systems
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will discover the difference between general purpose and embedded systems. They will examine computer architecture and the components that make up a processor. Pupils will recognise the need for storage and be able to select a suitable storage device for a given purpose.
Lesson Summary
You will learn to describe the purpose of RAM, ROM and cache in a device.
Key Notes
- RAM is volatile and ROM is non volatile.
- RAM stores data and instructions currently in use.
- ROM stores the start-up/boot-up instructions.
- Cache is used for frequently used instructions.
Vocabulary To Learn
- RAM: random access memory — temporary memory used to store data and instructions that the CPU needs while the computer is running
- ROM: read-only memory — stores essential instructions needed for the computer to start up and operate
- cache: a small storage location for frequently used instructions
- virtual memory: borrowed storage located in secondary storage, used when the RAM is full
Common Mistakes To Avoid
- RAM stores data and instructions when a computer is switched off.
3 Quick Questions (With Answers)
1. Describe the system or process from this lesson in clear steps.
RAM is volatile and ROM is non volatile. RAM stores data and instructions currently in use.
2. Define this computing term and give one practical example. 'RAM'
random access memory — temporary memory used to store data and instructions that the CPU needs while the computer is running. Add one real device or system example to prove understanding.
3. Correct this common computing misconception.
Mistake: RAM stores data and instructions when a computer is switched off. Correction: RAM is volatile — when power is switched off, the data and instrucions are lost.
More Lessons In This Unit
Browse all guides in the Year 10 Computing guide library.