Storage Flashcards

OCR GCSE J277 Computer Science specification

Primary storage

Fast, volatile memory used for immediate data access, e.g., RAM and cache.

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Terms in this set (13)

1

Primary storage

Fast, volatile memory used for immediate data access, e.g., RAM and cache.

2

RAM

Random Access Memory, volatile memory used for temporary data storage while programs run.

3

ROM

Read-Only Memory, non-volatile memory storing essential start-up instructions.

4

Virtual memory

Using secondary storage as extra RAM when physical RAM is full.

5

Cache

Very fast, small memory close to the CPU for frequently accessed data.

6

Secondary storage

Non-volatile storage for long-term data retention, e.g., hard drives, SSDs.

7

Optical storage

Uses lasers to read/write data, e.g., CDs, DVDs. Portable but slower and less durable.

8

Magnetic storage

Uses magnetic fields to store data, e.g., hard drives. High capacity and reliable.

9

Solid state storage

Uses flash memory, e.g., SSDs. Fast, durable, and portable but more expensive.

10

Data units

Bit, nibble (4 bits), byte (8 bits), KB, MB, GB, TB, PB.

11

Binary storage

Data is stored in binary (0s and 1s) because computers use digital signals.

12

File size formula for sound

Sample rate × duration (s) × bit depth.

13

File size formula for images

Colour depth × image height (px) × image width (px).

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