1.2 Memory And Storage

Question 1

Bit

Answer 1

1 or 0

Question 2

Nibble

Answer 2

4 bits

Question 3

Byte

Answer 3

8bits

Question 4

Kilobyte

Answer 4

1024 bytes (1000)

Question 5

Megabyte

Answer 5

1024 kilobytes (1000 )

Question 6

Gigabyte

Answer 6

1024 megabytes

Question 7

Terabyte

Answer 7

1024 gigabytes

Question 8

Petabyte

Answer 8

1024 terabytes

Question 9

Why binary

Answer 9

Easier to represent only 2 states using electrical components

Question 10

Overflow errors occur

Answer 10

When the number you are presenting is larger than 255 and you need an additional bit

Question 11

Left shift is

Answer 11

Multiplication

Question 12

Right shift is

Answer 12

Division

Question 13

Hex

Answer 13

0123456789 ABCDEF

Question 14

Character set

Answer 14

A set of characters each with a binary value assigned

Question 15

ASCII is 7 bits how many characters?

Answer 15

127

Question 16

Extended ASCII is 8 bits how many characters

Answer 16

255

Question 17

Colour depth

Answer 17

Number of bits needed to store each pixel

Question 18

Meta data

Answer 18

Extra info about an image

Question 19

Greater the colour depth / resolution greater the…

Answer 19

File size

Question 20

Sound file size calculation

Answer 20

Number of samples per second x number of bits per sample x length of sample

Question 21

Sample rate

Answer 21

The number of samples taken per second (measured in Hertz)

Question 22

Compression

Answer 22

Compression reduces the size of a file so it takes up less space

Question 23

2 advantages of compression

Answer 23

Maximise amount you can store
Smaller files are quicker to transfer and download

Question 24

Lossy

Answer 24

Loses data

Question 25

Lossless

Answer 25

Doesn’t lose data

Question 26

Order of byte

Answer 26

Byte kilobyte megabyte gigabyte terabyte petabyte

Question 27

RAM

Answer 27

Random access memory

Question 28

ROM

Answer 28

Read only memory

Question 29

Primary storage

Answer 29

Storage needed for the computer to function

Question 30

ROM RAM what and what

Answer 30

Registers and cache

Question 31

RAM does what

Answer 31

Keep data currently in use so the CPU can access it quickly

Question 32

ROM has what

Answer 32

Uneditable info that starts bootstrap (instructions needed to boot computer system)

Question 33

Registers and cache are found

Answer 33

In the CPU

Question 34

Registers do what

Answer 34

Have specific data and instructions

Question 35

Cache do what

Answer 35

Store frequently used instructions

Question 36

Which one isn’t volatile

Answer 36

ROM

Question 37

What does volatile mean

Answer 37

Will disappear if power is lost