CS R5 Data Compression Basics (AQA Computer Science)

Question 1

A bitmap image records each individual __________

Accepted Answer

Pixel

Question 2

JPEG is an example of .......

Accepted Answer

Run Length Encoding

Question 3

To create a bitmap with 5 colours, what colour depth would you need?

Accepted Answer

3

Question 4

Lossless data compression...

Accepted Answer

maintains the quality of the data

Question 5

We compress data to make it _____________ to transfer and store data.

Accepted Answer

easier

Question 6

How many colours can a 2 bit depth image contain?

Accepted Answer

4

Question 7

101 in binary is ______ in decimal

Accepted Answer

5

Question 8

Lossy data compression...

Accepted Answer

removes data

Question 9

Data compression means to .................... the file size.

Accepted Answer

reduce

Question 10

Today we learnt about data ___________________

Accepted Answer

Compression

Question 11

A jpeg image compresses a bitmap by........

Accepted Answer

Grouping similar pixels

Question 12

One example of a data compression type is...

Accepted Answer

Lossless

Question 13

Another example of a data compression type is...

Accepted Answer

Lossy

Question 14

1111 in binary is _______ in hex

Accepted Answer

F

Question 15

How many bits are required for a bitmap that only contains the colour Black and White?

Accepted Answer

1

Question 16

Convert 24000 bits into kilobytes

Accepted Answer

3

Question 17

FF in hex is ___________ in binary

Accepted Answer

1111 1111

Question 18

A bitmap image stored as 11110000 would be stored as __________ in jpeg.

Accepted Answer

41 40

Questions 18