Data Representation: Quiz 1

What is a bit?

• a basic computing element that is either 0 or 1

• a tiny piece

• a binary number

• a pixel

Which of these is the number system based on the number 16?

• Decimal

• Binary

• Denary

• Hexadecimal

Which of these are not typically represented in hexadecimal?

• MAC address

• Colour codes

• IPv4 address

• Error codes

Convert 89 from denary to binary. Write your answer as an 8-bit number.

Convert 103 from denary to hexadecimal.

Convert 11010111 from binary to hexadecimal.

Convert E9 from hexadecimal to denary.

What is an overflow error?

• When bits are shifted left or right

• When the result of a calculation is too large to fit in a binary register

• Converting a negative denary number to binary

• The result of flipping bits in a binary number

Express -78 as a binary number in 8-bit two's complement form.

Express 53 as a binary number in 8-bit two's complement form.