a system where a code is used to represent something

converting information from one form into another

converting encoded data back into its original form

a character set that represents each character with a unique numerical value

Representing characters

Computing

Representing information

Binary digits

Numbers in binary

Measurements of data

Turing's mug cryptography challenge

In this unit pupils will be introduced to binary digits and how they can be used to represent text and numbers. Pupils will perform conversions between binary and decimal numbers and how binary can be used to represent characters. They will explore how cryptography can be used to protect data.

Data representation: text and numbers

the standard that uses 65 to represent "A"

a set of rules for changing letters into numbers

Match each example to the correct keyword:

to represent letters, numbers and symbols in digital form

What is the main purpose of a character coding scheme like ASCII?

In computing, how is every piece of information ultimately represented?

decode the message back into its original form

Put these steps in order for encoding and decoding a message:

When measuring the length of a representation, what should you include?

If the word "Hello" is written in Morse code as ".... . .-.. .-.. ---", what is the representation length of this code?

the form in which data is stored, processed and transmitted

What does the word representation mean in computing?

What do we call something that stands for something else, like an emoji or a road sign?

Put these actions in order for representing a picture on a computer:

some representations are clearer or more useful depending on the context

Which of these is a reason to use different representations for different situations?

the form in which data is stored, processed, or transmitted

the system of 0s and 1s used by computers

data that has been organised and given meaning

What is the name for the system of 0s and 1s that computers use to represent all types of information?

Representing characters

Lesson outcome