OCR GCSE Computer Science: 1.2.4 Data Representation

Computers use which number system to represent data?

• Binary

• Trinary

• Decimal

• Hexadecimal

Hexadecimal uses numbers...?

• 0 and 1

• 0 to 9

• 0 - 16

• 0 to 15

How many Bits are there in a Byte?

• 4

• 8

• 16

• 32

How many Bits are there in a Nibble?

• 4

• 8

• 16

• 32

1 Megabyte contains...

• 1,000,000 Bytes

• 1,000,000 Bits

• 1,000,000 Kilobytes

• 1,000,000 Kilobits

Which of the following are equal to 1 Gigabyte

• 1,000 Kilobytes

• 1,000 Megabytes

• 8,000 Megabits

• 80,000 Kilobits

What is the largest decimal number that can be represented by 8 bits?

• 64

• 127

• 255

• 256

Convert 1011 to decimal...

• 8

• 9

• 10

• 11

Convert 9 to Binary...

• 1100

• 1001

• 1111

• 1011

Convert A6 to Binary...

• 1001 0110

• 1010 1001

• 1010 0110

• 1111 1001