2.4 Computational Logic

Why is data in computer systems represented in binary?

Answers:1

• Binary is the representation of the 'presence' of electricity

  If present or 'on' we use a: 1

  If absent or 'off' we use a: 0

• Binary is the only way we could have designed computers

What is the purpose of logic gates?

Answers: 2

• Logic Gates take inputs

• Logic gates boost the speed of electricity in a system

• Logic gates convert inputs into an output

• Logic gates repeat the inputs as outputs

Which of the three are the logic gates you must know for the GCSE exam?

• AND

• OR

• NOT

• MOD

• DIV

Every logic gate can be made up of AND, OR & NOT

• True

• False

Which of the below is equal to A AND B?

• A ⋀ B

• A ⋁ B

• ¬ A

Which of the below is equal to NOT A?

• A ⋀ B

• A ⋁ B

• ¬ A

Which of the images below represents an AND gate

• 
• 
• 

Which of the images below represents an OR gate

• 
• 
• 

Which of the images below represents an NOT gate

• 
• 
• 

A = FALSE

NOT A =

• True

• False