84. OCR 2.4 Applying logical operators in truth tables

What is the primary condition for a logical fire alarm system to activate an alert based on temperature?

• The temperature is below 60 degrees Celsius.

• The temperature rises above 60 degrees Celsius.

• The system is manually deactivated.

• The temperature is exactly 60 degrees Celsius.

Which logical gate is used to represent a condition where either of two inputs can trigger an output?

• AND gate

• OR gate

• NOT gate

• XOR gate

What is the role of a NOT gate in a logical system?

• To ensure the system activates when both conditions are false.

• To invert the input signal.

• To combine the outputs of two other gates.

• To directly activate the system.

In a truth table, what does the column labelled 'E' typically represent?

• The output of the AND gate.

• The output of the OR gate.

• The output of the NOT gate.

• The input from a sensor.

How many possible combinations of inputs are there for three binary inputs?

• 4

• 6

• 8

• 10

Which logical gate requires both inputs to be true for the output to be true?

• OR gate

• AND gate

• NOT gate

• NOR gate

If both inputs to an OR gate are false, what is the output?

• 0

• 1

• Depends on the NOT gate

• Cannot be determined

In a truth table, what binary number represents the scenario where all inputs are off?

• 000

• 111

• 101

• 010

What is the purpose of constructing a truth table in a logical system?

• To determine the physical layout of the system.

• To visually represent all possible input combinations and their corresponding outputs.

• To calculate the temperature inside a building.

• To measure the response time of the system.

If both inputs to an AND gate are true, what is the output?

• 0

• 1

• Depends on the NOT gate

• Cannot be determined