Boolean Logic - 2.3

Question 1

What are logic gates (2)?

Answer 1

Special circuits built into computer chips
Receive binary data, apply Boolean logic, then output a binary result

Question 2

What are logic diagrams (3)?

Answer 2

Drawn to show logic gates and circuits
Each type of gate has a different symbol
Also each gate has a corresponding truth table

Question 3

What is a truth table?

Answer 3

Shows all possible input combinations of 1’s and 0’s, and the corresponding outputs

Question 4

How does the NOT gate work?

Answer 4

Takes a single input and gives a single output
Output is always opposite to the input
Line with triangle and dot and line

Question 5

How does the AND gate work?

Answer 5

Takes two inputs, gives one output
Both inputs 1 = 1, otherwise output is 0
2 lines go to a semi circle thing and then a line

Question 6

How does an OR gate work?

Answer 6

Takes two inputs and gives one output
If one or more inputs are 1 then output = 1

Question 7

How should multiple logical statements be completed? E.g. NOT (A AND B)

Answer 7

Operations in brackets first
Complete truth table with each operation

Question 8

What is a transistor?

Answer 8

Like an off/on switch digitally controlled