GCSE Computer Science Data Rep Pre Test Help

How many bits in a byte?

• 5

• 6

• 7

• 8

• 9

How many bytes in a kilobyte?

• 1000

• 2000

• 5000

• 999

How many bytes in a Megabyte?

• 1 000 000

• 1 000 00000

• 1 000 00000000

• 1 000 00000000000

Explain why computers use binary? (multiple answers)

• Computers operate using logic gates

• Computers use circuits which can be on or off

• represented by 1 and 0

• Because they didn't like speaking English

What is the Denary Value of 101

• 1

• 2

• 3

• 4

• 5

What is a Binary Overflow?

• Binary overflow errors are when the result of a binary calculation requires 5 bits than are available instead of bytes

• Binary overflow errors are when the result of a binary calculation requires more bits than are available

• Binary overflow errors are when the result of a binary calculation requires more convexes than are available

What does a left shift of 1 place do to Binary do?

• multiplies by 2

• multiplies by 4

• multiplies by 8

• it makes the numbers go around again

• To divide by four, all digits shift ??? places to the right in Binary

• 1

• 2

• 3

• 4

• disco

How many bytes would the following message require to store with extended ASCII?

game over man!

• 10
• 12
• 14
• 15

What is limitation of the ASCII character set?

• ASCII only uses 6 bits (or 10 for extended ACSII)

         So it can only represent 355  (or 456) characters.

              This is not enough to represent characters in other alphabets

• ASCII only uses 7 bits (or 8 for extended ACSII)

         So it can only represent 128  (or 256) characters.

              This is not enough to represent characters in other alphabets

• ASCII only uses simple compression methods so o it can only represent 100 characters.

              This is not enough to represent characters in other alphabets

• It's A.I has been replaced

• It was a type of disco that is not popular