Year 9 Computer Science Revision list

The difference between RAM & ROM?

The purpose of ROM in a computer system?

The purpose of RAM in a computer system?

The need of virtual memory?

Flash memory

The need for secondary storage?

Data capacity

calculation of data capacity requirements

common types of storage

suitable storage devices and storage media for given application, and the advantages and disadvantages of these.

Magnetic storage , Relatively cheap per unit of storage. Fast access and retrieval times compared to other storage devices.

Optical storage , it can store movies with better picture and sound quality. some are portable.

Solid State Storage Devices , Very compact in size and therefore very portable. High speed of data transfer and low power consumption.

Magnetic storage , Can be easily damaged, will slow down and eventually break over time. Slower access than Solid State Drives.

Optical storage , can lose data when scratched.

Solid State Storage Devices , Considerably more expensive per unit than magnetic storage. More vulnerable to abrupt power loss and electro-magnetic fields.

Please go to P2 of this flashcard