Oxford Cambridge and RSA
GCSE (9-1) Computer Science
Computer Systems
J277/01
Topic: Unit 1.2 Primary Storage
Time allowed: 30 minutes
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INSTRUCTIONS INFORMATION
Turn over
1
Complete the description of Primary Storage by filling in the gaps using the words provided below.
Not all words will be used.
[7]
volatile  |  non-volatile  |  secondary  |  primary  |  firmware
start-up  |  deleted  |  saved  |  ROM  |  RAM
Computers use storage to hold data that the processor needs to access quickly. This is usually made up of two types of memory.

is a type of memory that is Read-Only. This stores the instructions, which tell the computer how to boot up. This memory is , meaning the data is not lost when the power is turned off.

The other type is . This stores the data and instructions that are by the processor. This memory is , meaning the contents are lost when the power is turned off.
2
Tick one box in each row to identify whether the statement describes RAM or ROM.
[4]
Statement RAM ROM
Stores the BIOS (Basic Input Output System)
The contents can be changed by the computer
Has a larger capacity in a typical personal computer
Stores the operating system parts currently in use
Turn over
3
State the purpose of RAM in a computer system.
(Do not describe its characteristics like volatile/non-volatile).
[2]
4
A car has an on-board computer system (an embedded system) to control the engine.

Explain why this computer system needs Read Only Memory (ROM).
[2]
5
Explain one difference between RAM and ROM relating to their volatility.
[2]
END OF QUESTION PAPER