Data representation

Give one reason why data is represented in binary in a computer

• Because it's one of the ways computers understand data

• The digits 0 and 1 can be represented by a switch being ON or OFF

• Because it's cheaper

• It's quicker

How many bits in a byte?

• 1

• 256

• 4

• 8

How many bytes are there in a MB?

• Thousand

• Million

• Billion

• 10

What is the denary equivalent of

0000 1011

• 10

• 14

• 11

• 12

What is the denary equivalent of

1111 1111

• 8

• 256

• 255

• 43

How many bytes are there in: 3KB

• 3000

• 3,000,000

• 3,000,000,000

How many bytes are there in: 2.5MB?

• 2005

• 2,500,000

• 250

How many bytes are there in: 2GB?

• 2,000,000,000

• 2,000

• 2,00,000

Write down the decimal equivalent.

1101

• 13

• 15

• 14

• 10

What binary value is represented by the switches in the following circuit?

• 1001 1110

• 0110 0001

• 0111 1100

• 1111 1111