AQA GCSE Computer Science 3.3 Fundamentals of data representation overview quiz quiz

$15$

$21$

$25$

$42$

Because components have two states that map to 0 and 1

Because base 2 is easier for human programmers to read than decimal

Because binary uses less electricity than decimal numbers

Because there are only two digits available in maths

It divides the whole number by 2 each time

It adds exactly 1 to the stored value

It multiplies it by 2

It reverses the order of all the bits

When the result of the addition happens to be zero

When the two numbers being added are exactly equal

When a binary number is shifted one place to the right

When the result needs more bits than are available

$44$

$32$

$28$

$212$

2

4

8

16

64

128

256

1024

The total number of pixels across the whole image

The physical size of the screen the image is shown on

The number of colours each pixel can be

The compression method used to store the file

sample rate divided by bit depth times duration in seconds

image width times height times the colour depth in bits

bit depth times screen resolution times duration

sample rate times bit depth times duration in seconds

It reduces size with no loss of data so the original can be rebuilt

It permanently removes some data so the original file cannot then be rebuilt

It is the compression method used by both MP3 and JPEG files

It always makes the resulting files much larger than before

Gives the most frequently used characters the shortest binary codes

Removes fine detail that the human eye cannot easily see

Replaces a run of repeated values with the value and a count

Converts an image into a string of hexadecimal digits

1500

24000

192000

3000