1.2 Memory and Storage

Question 1

Give 2 examples of primary storage

Answer 1

RAM
ROM

Question 2

Describe RAM

Answer 2

Random access memory
Volatile- temporary
Stores programs currently running

Question 3

Describe ROM

Answer 3

Read only memory
Non volatile
Stores boot up program

Question 4

Virtual memory

Answer 4

When all RAM is full,
HDD drive secondary storage used as extension
Slow,

Question 5

Why do we need secondary storage

Answer 5

To save data long term
Non volatile

Question 6

Describe optical storage

Answer 6

DvD
Low capacity
Cheap
Portable
Slow access speeds

Question 7

Describe magnetic storage

Answer 7

Large capacity
Slow access speeds
Not portable
Mid access speeds

Question 8

Describe solid state storage

Answer 8

Portable
Fast access speed
high capacity
Expensive

Question 9

Hoe many bits in a nibble

Answer 9

4

Question 10

How many bits in a byte

Answer 10

8

Question 11

How many kilobytes in a megabyte

Answer 11

1000

Question 12

Equation for sound file size

Answer 12

Bit depth x duration x sample rate

Question 13

Image file size equation

Answer 13

Colour depth x height x width

Question 14

Text file size equation

Answer 14

Bits per character x characters

Question 15

Ascending powers of 2 for binary

Answer 15

1 2 4 8 16 32 64 128 256

Question 16

How to convert denary to hexx

Answer 16

Divide the number by 16
Allocate apohabet corresponding if above 10
Denary - the remainder

Question 17

State the 2 character sets

Answer 17

Ascii
Unicode

Question 18

What does metadata store

Answer 18

Additional Image info eg size and location

Question 19

How must analogue sounds be stored

Answer 19

Binary

Question 20

Describe Lossy compression

Answer 20

Unrequited data removed from file
Quality reduced

Question 21

Describe Lossless compression

Answer 21

Uneeded data removed from the file
added back before being used again