Data Representation

Question 1

What is a decimal notational system?

Hint: One digit, two digits and three digits

Answer 1

• Also known as base 10.
• Where a single digit contains values from 0 to 9.
• If two combined digits are used, this will contain values from 0 to 99.
• If three comibned digits are used, this will contain values from 0 to 999.

Question 2

What is a binary notation system?

Answer 2

• Also known as base 2.
• Is a numbering system where numbers contain two values; either 0 or 1.

Question 3

What is a hexadecimal notational system?

Answer 3

• Also known as base 16.
• Where numbers from 0 to 9 are assigned values of 0 to 9; but from 10 - 15 values of A to F are assigned.

Question 4

What is ASCII and What is Unicode?

Answer 4

• ASCII encodes english letters, digits and punctuations to binary values. Uses 8 bit of data.
• Unicode is an extended character sets (non-english) to be encoded into binary values. Uses 8 or 16 bits of data.