Logic Circuits and Boolean Expressions Quiz

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

• NOR gate

• XOR gate

• AND gate

• OR gate

What is the output of a NAND gate when both inputs are true?

• Depends on the circuit

• False

• True

• Cannot be determined

How many possible input combinations are there for a truth table with three inputs?

• 10

• 8

• 6

• 4

In a truth table, what does the column labeled 'D' represent in the given example?

• A constant value

• The final output

• An interim output

• An input

What is the correct logic expression for a circuit with an AND gate followed by a NOT gate?

• A OR B

• NOT (A AND B)

• A AND B

• A XOR B

Which of the following is a valid representation of the logic expression D = A AND B OR NOT C?

• D = A AND NOT B OR C

• D = NOT A AND B OR C

• D = A OR B AND NOT C

• D = (A AND B) OR NOT C

When constructing a logic expression, what is the purpose of using brackets?

• To add complexity

• To clarify the order of operations

• To separate different expressions

• To make the expression longer

In the fire alarm scenario, what logic gate ensures the alarm can be manually shut off?

• XOR gate

• NOT gate

• OR gate

• AND gate

What happens to the fire alarm if both the temperature rises and the alarm is manually activated?

• The alarm goes off

• The alarm malfunctions

• The alarm stays off

• The alarm resets

In the fire alarm scenario, what is the role of the OR gate?

• To invert the input

• To allow either condition to trigger the alarm

• To delay the alarm

• To ensure both conditions must be true