Term 5 Binary Encoding

Question 1

How many bits are there in a single Byte?

Answer 1

8

Question 2

How many Bytes are in a kiloByte (kB)?

Answer 2

1024

Question 3

What are the primary colours of light used for coding pixels?

Answer 3

Red, Green and Blue

Question 4

When we looked at data compression what did RLE stand for?

Answer 4

Run Length Encoding

Question 5

If two 8 bit numbers are added together and the answer does not fit into 8 bits what is the name for this problem?

Answer 5

Overflow error

Question 6

Which three factors affect the size of a sound file?

Answer 6

Bit depth, sample rate, number of channels

Question 7

If binary (BIN) is base 2 and denary (DEN) is base 10 what is hexadecimal (HEX)?

Answer 7

base 16

Question 8

To the nearest million, how many colours can be made using 24 bit depth for a pixel?

Answer 8

16 million

Question 9

What is the name for a compression technique which can perfectly re-create the original file when it is decompressed?

Answer 9

lossless

Question 10

Which colour would be represented by the 24 bit value 11111111 11111111 00000000

Answer 10

Yellow

Question 11

Which colour would be represented by the 24 bit value 00000000 11111111 11111111

Answer 11

Cyan

Question 12

Which colour would be represented by the 24 bit value 11111111 00000000 11111111

Answer 12

Magenta

Question 13

Which colour would be represented by the 24 bit value 11111111 11111111 11111111

Answer 13

White

Question 14

Which type of sounds would be lost first if the sample rate was decreased during recording?

Answer 14

High frequency sounds

Question 15

What would cause an image to be ‘pixelated’?

Answer 15

A resolution that is too low

Question 16

Why is hexadecimal used in computing?

Answer 16

It is more memorable than binary

Question 17

Put these in order from lowest to highest: Tera, Mega, Giga, Kilo

Answer 17

Kilo, Mega, Giga, Tera

Question 18

If we compress data compression when we use RLE what is a ‘run’?

Answer 18

Several pieces of data that are the same in a row

Question 19

Is the computerised version of a sound wave analogue or digital

Answer 19

Digital

Question 20

In computer images what is colour depth?

Answer 20

The number of bits used to store the colour

Question 21

What is the binary number 11001100 in denary?

Answer 21

204

Question 22

What is the largest value an 8-bit binary number can hold?

Answer 22

255 (11111111)

Question 23

What is the smallest value an 8-bit binary number can hold?

Answer 23

0 (00000000)

Question 24

Where does the name bit come from?

Answer 24

It means BInary digiT and is formed by compressing parts of the two words.