AQA - Section 4 - Applying logical operators in truth tables

What triggers the fire alarm according to the scenario?

• Temperature inside the building drops below 60 degrees Celsius

• Both temperature and manual smash panel need to be activated

• A fire officer manually activates the alarm

• Temperature inside the building rises above 60 degrees Celsius or a fire-alarm glass panel is smashed

What can a fire officer do in the given scenario?

• Activate the fire alarm

• Manually shut off the fire alarm

• Smash the fire-alarm glass panel

• Increase the temperature threshold for the alarm

Which logic gates are mentioned as necessary for the GCC exam?

• Latch, Flip-Flop, Counter

• Buffer, Tri-state, Schmitt

• NAND, NOR, XNOR

• AND, OR, XOR, NOT

What does the NOT gate do in the scenario?

• Inverts the output of the manual override

• Increases the temperature threshold

• Activates the fire alarm

• Deactivates the OR gate

What is the initial state of the inputs in the logic diagram?

• The state of inputs is not mentioned

• All inputs are 1

• All inputs are 0

• Inputs are a mix of 0s and 1s

What happens when the temperature rises above 60 degrees Celsius?

• The OR gate outputs a 1

• The NOT gate outputs a 1

• The AND gate outputs a 0

• The fire alarm remains off

How many initial inputs are there in the logic diagram?

• Five

• Four

• Two

• Three

What is the output of the AND gate when both its inputs are 1?

• The output is not specified

• The AND gate does not have two inputs

• 1

• 0

How is the output D determined in the truth table?

• It is determined by the NOT gate alone

• It directly follows the state of input A

• It is the result of E and F

• It is always 0

What does the OR gate require to output a 1?

• At least one input is 1

• Both inputs are 0

• It outputs 1 regardless of the inputs

• It never outputs 1