Boolean Expressions, Truth Tables, and Logic Gates

In this logic circuit, what is Q if the inputs are: A=0, B=1, C=0?

• 0

• We can't say

• 1

What is the boolean expression for this logic circuit?

• A OR B AND C = Q

• Q = (A AND B) OR C

• Q = A OR (B AND C)

• Q = (A OR B) AND C

Which is the truth table for the AND gate?

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• 
• 

Which logic gate take the input and negates it, turning 0 to 1 and 1 to 0?

• AND

• OR

• NOT

This is the truth table for which logic gate?

• AND

• OR

• NOT

Which logic gate is shown here?

• OR

• NOT

• AND

• NAND

Which logic gate is shown here?

• AND

• OR

• XOR

• NOT

What would the output (z) be if the inputs were the following?

A=1

B=0

• 0

• 1

What is the boolean expression for this logic circuit?

• Q = NOT (A OR B)

• Q = NOT A AND B

• NOT A OR B = Q

• Q = (NOT A) OR B

Answer explanation

The logic circuit is represented by the boolean expression 'Q = (NOT A) OR B'. This indicates that Q is true if A is not true or if B is true. Other options either do not follow the correct logic or incorrectly represent the negation.

Which logic gate outputs 1 only when both inputs are 1?

• AND

• OR

• NOT

• XOR