OCR GCSE Computer Science 1.2 Memory and storage overview quiz quiz

It is non-volatile and keeps all of its data without any power

It stores the start-up boot program permanently in hardware

It is read-only and cannot be written to by the processor

It is volatile and loses data when the power is off

To store the fixed start-up program that runs when the computer is switched on

To hold all of the programs and data that are currently being used

To act as extra RAM whenever the main memory becomes completely full

To store all of the user's documents and personal files permanently and safely

Extra fast cache memory built directly inside the CPU chip

Part of secondary storage used as if it were extra RAM

A type of read-only memory that holds the boot program

Special memory that never loses any of its stored data

Magnetic disk

Optical disc

Solid state

Cache memory

2

4

8

16

00110100

01010000

00101010

00110010

D2

C2

B2

D4

Whenever there is any carry at all between any two of the inner columns

Whenever the final answer happens to contain a 0 digit anywhere

When there is a carry out of the most significant (leftmost) column

Whenever two numbers that are exactly equal are added together

3

6

8

16

Computers themselves actually store all of their data directly in hexadecimal at the hardware level

It can represent far more colours and numbers than ordinary binary ever could

It uses fewer electrical states inside the hardware than binary does internally

It is more concise and easier for people to read and check, with each digit mapping to a nibble

20000 bits

5000 bits

2500 bits

40000 bits

It keeps every bit of the data so the original can be perfectly restored later

It permanently removes some data, so the original cannot be exactly restored

It is only ever used for plain text files and nothing else at all

It makes files much larger rather than smaller after compression