Boolean Operators

Boolean Operators

AND, OR, NOT

Multiple Select

In this lesson you are going to ...

• define AND, OR, NOT Boolean logic gates

• Use Boolean operation in code

• Create truth tables

• Draw logic circuits

Multiple Choice

What are the only two possible values for a Boolean expression?

• True / False

• 0 / 1

• off / on

• Y / N

Multiple Select

Which of these Boolean operators do you need to be able to use in GCSE Computer Science?

• And

• Or

• Not

• XOR

• NAND

Multiple Choice

What is the value of this Boolean expression?

0 And 1

• 0

• 1

Multiple Select

Which two of these statements describes the Boolean And operation?

• Only outputs 1 if both inputs are 1

• Only outputs 0 if both inputs are 0

• Always outputs 1 unless both inputs are 0

• Always outputs 0 unless both inputs are 1

Multiple Choice

What is the value of this Boolean expression?

0 Or 1

• 0

• 1

Multiple Select

Which two of these statements describes the Boolean Or operation?

• Only outputs 1 if both inputs are 1

• Only outputs 0 if both inputs are 0

• Outputs 1 providing at least one input is 1

• Outputs 1 providing both inputs are different

Multiple Choice

What is another name for the Boolean Not operator?

• Inverter

• Negater

• Changer

• Flipper

Multiple Choice

What is the value of this Boolean expression?

Not 1

• 0

• 1

Multiple Choice

Evaluate this Boolean expression:

(4 >= 4) And (9 == 3**2)

• True

• False

Multiple Choice

What is the correct order for evaluating Boolean expressions?

• brackets

  not

  and

  or

• or

  and

  not

  brackets

• brackets

  not

  or

  and

• brackets

  and

  or

  not

Multiple Choice

Evaluate this Boolean expression:

3 > 2 or 4 != 4 and not 5 <= 5

• True

• False

Multiple Choice

Evaluate this Boolean expression:

(not (3==4) or len("Hello") > 5) and 5**2 >= 25

• True

• False

Multiple Choice

Which column headings are needed in the truth table for this Boolean expression?

A and B or A

• A

  B

  A and B

  A and B or A

• A

  B

  B or A

  A and B or A

• A

  B

  A and B or C

Multiple Choice

Which column headings are needed in the truth table for this Boolean expression?

not A and not B or not B and C

• A

  B

  C

  not A

  not B

  not A and not B

  not B and C

  not A and not B or not B and C

• A

  B

  C

  not A and not B

  not B and C

  not A and not B or not B and C

• A

  B

  C

  not A

  not B

  not B or not B

  not A and not B or not B

  not A and not B or not B and C

Multiple Choice

What is the output when ....

attendance = 1.0

missedAssignments = 0

• pass

• fail

Multiple Choice

What is the output when ....

attendance = 0.85

missedAssignments = 1

• pass

• fail

Multiple Choice

What is the output when ....

attendance = 0.84

missedAssignments = 0

• pass

• fail

Multiple Select

In this lesson I have learned to ...

• Construct truth tables for Boolean expressions

• Define AND, OR, NOT logic operations

• Use relational and logic operators in flowcharts and code

Open Ended

Prioritise the knowledge you have gained today from most important to least important...

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it