3.1 Storage Units and Binary Numbers/ Binary Arithmetic and Hexadecimal/ 3.3 ASCII and Unicode

Does hexadecimal take up less space in a computer’s memory than binary

No, because it will still be represented using binary in a computer’s memory, so it will take up the same amount of memory space

What is the largest decimal number that can be represented using 5 bits

31

What is represented using binary

All data and instructions

Why is hexadecimal often used instead of binary

It’s easy for people to read, takes less time to type, more compact, reduces the risk of typing errors

How many bits does standard ASCII use for each character

7

How many different characters can be represented with standard ASCII

128

Advantages of UNICODE

Can represent a wider range of characters from other alphabets and more symbols

12KB in bits

96000b

Why do computers use binary

Computers are made from transistors with two stats: on if a current is flowing through the component and off if it’s not, so it’s represented with either 1 or 0