OCR Computer Science J277- 1.2 (Memory and Storage)

Front

ROM stands for...

Back

Read Only Memory

Front

RAM stands for ...

Back

Random Access Memory

Front

A computer has 1000 megabytes of RAM. That is the same as ...

Back

1 Gb

Front

The characteristics of RAM are it is .....

Back

Temporary, volatile, expandable and you can write to it.

Front

This memory stores the data of the operating system and programs that are currently running, for access by the CPU.

Back

RAM

Front

Why is ROM needed in a computer system?

Back

It stores the 'bootstrap loader' which is needed to load the operating system. Without it, the computer wouldn't turn on.

Front

This is a method of making a computer appear to have more primary memory than it has really has physically. For instance a PC might have 2Gb of RAM as primary memory, but ___ of 4Gb. If a computer relies on this memory it will be slow.

Back

Virtual Memory

Front

Why is Virtual Memory needed in a computer system?

Back

When several programs run at the same time, the RAM can be full. Instead of closing programs the Operating system uses virtual memory to store some data.

Front

Where is data stored when it is Virtual Memory?

Back

It is stored on a area of a secondary storage device e.g. hard disk drive.

Front

What is a disadvantage of Virtual Memory?

Back

Read/Write speed of a hard disk drive is slower than RAM. If the computer has to rely on this, the system is much slower.