1.3 Memory Flashcards Preview

AWard GCSE Computer Science > 1.3 Memory > Flashcards

Flashcards in 1.3 Memory Deck (21)
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1
Q

What is volatile memory

A

Temporary memory

It requires power to retain its data

2
Q

What is non volatile memory

A

Permanent memory

Keeps content even when it has no power

3
Q

What does RAM stand for

A

Random
Access
Memory

4
Q

What is RAM and how is it used

A

Holds data and instructions that are currently in use by the processor
Located in motherboard
Directly accessible by the processor
All data/instructions are lost once power is turned off (volatile)

5
Q

Virtual memory is..

A

Secondary storage used as extra RAM

6
Q

What type of data is moved to virtual memory

A

Data that hasn’t be used recently

7
Q

When is virtual memory needed

A

If too many applications are open at once

8
Q

How do the CPU and virtual memory work together

A

If CPU needs to read data stored in VM, it must move the the data back to RAM

Data transfer rates are much slower on secondary storage than RAM

9
Q

What does ROM stand for

A

Read
Only
Memory

10
Q

ROM tells….

A

Tells the CPU how to boot up

11
Q

What is ROM what is it’s use

A

Instructions are permanently etched onto a ROM chip

The instructions contained tell a computer how to properly boot up. Instructions are called BIOS

When computer powered on, CPU reads the instructions from ROM - CPU to preform self checks and set up computer

12
Q

What does BIOS stand for

A

Basic
Input
Output
System

13
Q

What type of memory do ROM chips use and why

A

Flash memory as it is non-volatile memory that stores data an electrical circuits by trapping electrons

14
Q

Data is not permanently written to this type of memory

A

RAM

15
Q

This memory holds the instructions for booting up the computer

A

ROM

16
Q

For this memory the the computer needs to be on to retain data

A

RAM

17
Q

This type of memory is a type of volatile memory

A

RAM

18
Q

This memory the data is or written and comes with the computer

A

ROM

19
Q

This memory the data is permanently written

A

ROM

20
Q

What’s firmware

A

Permanent software programmes into ROM

21
Q

Disk thrashing

A

When a computers virtual memory subsystem is in a constant state of paging