APCSP Big Idea 2 - BNS

The hexadecimal number FF has the value of 255 in decimal -

• TRUE

• FALSE

A bit is

• a numerical label assigned to each device.

• the smallest unit of data in a computer.

• a keyboarding term for typing.

• just a lil bit.

Why was hex created?

• To simplify the representation of binary sequences

• Letters needed to be used more in life

• It actually came before binary

• To confuse students in their GCSEs

Convert 1F in Hexadecimal to Decimal

• 31
• 16
• 23
• 19

1111 to decimal

• 15

• 11

• 12

• 13

Convert 85 into Hexadecimal

• 01010101
• 55
• 5A
• A5

Denary = 78
Binary in bits = ?

• 01100010
• 4E
• 01001110
• E4

Binary = 1101
Hex = ?
Dec = ?

• D, D
• 13, 13
• D, 13
• 13, D

ASCII

• Having multiple backups to ensure reliability during cases of high usage or failure

• A group of computers and servers that are connected to each other.

• American Standard Code for Information Interchange; the universally recognized raw text format that any computer can understand

• A type of computer that forwards data across a network

Binary:

• A set of rules governing the exchange or transmission of data between devices.

• a simplified representation of something more complex. Abstractions allow you to hide details to help you manage complexity, focus on relevant concepts, and reason about problems at a higher level.

• A way of representing information using only two options

• having multiple backups to ensure reliability during cases of high usage or failure.