4.5.2 Number Bases Flashcards Preview

AQA A-Level Computer Science > 4.5.2 Number Bases > Flashcards

Flashcards in 4.5.2 Number Bases Deck (4)
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1
Q

What base are binary, decimal and hexadecimal numbers?

A
binary = base 2
decimal = base 10
hexadecimal = base 16
2
Q

How to convert from binary to decimal?

A

Multiply the nth least significant digit by 2^(n-1)

3
Q

How to convert from binary to hexadecimal?

A

Split binary into nibbles and convert nibbles into decimal and if it is greater than 9, represent the 2 digit numbers with a letter starting from A to F

4
Q

Why do we use hexadecimal as a shorthand for binary?

A

Makes it easier for humans to work with when binary numbers are long. Takes up less area on the output monitor when binary numbers are long