Unit 1 - Data representation

Question 1

What are the three number system you need to know?

Answer 1

• Denary
• Binary
• Hexadecimal

Question 2

What is binary?

Answer 2

the code that computers and machines use to process information. Is it a base-2 system (composed of 1 and 0). All data that computers are required to process has to be converted into binary for the computer to understand.

Question 3

Why do computers use binary?

Answer 3

It is easier for computers to understand because the processor inside the computer can execute only binary commands

Question 4

What is denary?

Answer 4

It is a base-10 system (there are 10 digits that form the base system which are 0,1,2,3,4,5,6,7,8,9) (basically it is just normal numbers that humans use).

Question 5

What is hexadecimal?

Answer 5

Another number system that computers use for processing. It is a base-16 number system. Similar to denary as it uses the number 0-9, but the numbers 10-15 are represented by the letters A-F.

Question 6

Why do humans like hexadecimal more than binary?

Answer 6

Computers only use binary, hexadecimal is more for humans as it shortens a long binary number.