Data Representation Round (AQA 8525)

Math Response

Convert

0110 1110

into denary

Type answer here

Correct Answer: 110

Deg^°

Rad

Math Response

Convert
1010 0011

to denary

Type answer here

Correct Answer: 163

Deg^°

Rad

Math Response

Convert

1111 0011

into denary

Type answer here

Correct Answer: 243

Deg^°

Rad

Math Response

Convert

65

to binary

Type answer here

Correct Answer: 01000001

Deg^°

Rad

Math Response

Convert

201

into binary

Type answer here

Correct Answer: 11001001

Deg^°

Rad

Math Response

Convert

17

to binary

Type answer here

Correct Answer: 00010001

Deg^°

Rad

17
Largest column heading that fits into 17? 16
17 - 16 = 1
Largest column heading that fits into 1? 1
1 - 1 = 0
Put a 1 into the columns that you have used, and zeroes into the ones you haven't

Denary to binary

​128	64​	​32	16​	8​	4​	2​	1​
​0	0​	0​	1​	0​	0​	0​	1​

Math Response

A sound file has a sample rate of 4.4Khz

How many samples does it take per second?

Type answer here

Correct Answer: 44000

Deg^°

Rad

Math Response

A sound file has stereo sound.

How many channels does this mean it has?

Type answer here

Correct Answer: 2

Deg^°

Rad

Math Response

A sound file has a sample resolution of 16.

How many bits does this mean are used to store each sample?

Type answer here

Correct Answer: 16

Deg^°

Rad

Math Response

A sound file is 4 minutes long.

How many seconds are there in the track?

Type answer here

Correct Answer: 240

Deg^°

Rad

Math Response

How many bits are used to store a sound file that has stereo sound, is 4 minutes long, has a sample rate of 4.4Khz and a sample resolution of 16?

Type answer here

Correct Answer: 16896000

Deg^°

Rad

Math Response

Convert

16,896,000 bits

into KB

Type answer here

Correct Answer: 2112

Deg^°

Rad

Math Response

Convert

16,896,000 bits

into MB

Type answer here

Correct Answer: 2.112

Deg^°

Rad

Representing sound - Fundamentals of data representation - AQA - GCSE Computer Science Revision - AQA - BBC Bitesize

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Multiple Choice

What is the colour depth of the image?

• 1

• 2

• 00

• 3

Multiple Choice

What is the resolution of this image?

• 10

• 20

• 100

• 200

Multiple Choice

How many colours can be represented with the colour depth used in the image?

• 1

• 2

• 3

• 4

Multiple Choice

What is the file size of the image?

• 100 bits

• 200 bits

• 400 bits

• 40 bits

Multiple Choice

Which type of compression would be most appropriate for this image?

• Huffman Coded

• Run Length Encoding

• Run Long Encoding

• Huffman coding

Representing images - Fundamentals of data representation - AQA - GCSE Computer Science Revision - AQA - BBC Bitesize

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Drag and Drop

ASCII uses ​

Placeholder

bits, giving a character set of ​

Placeholder

characters. The characters are represented in a table, called the ASCII table. ASCII can only represent a few languages because ​

Placeholder

​

Drag these tiles and drop them in the correct blank above

seven

128

there is only room for latin characters

there is only English letters

255

eight

Match

In ASCII, if A is 65

• B

• D

• E

• G

• L

66

68

69

71

76

• 66

• 68

• 69

• 71

• 76