Year 8 - Computer Systems

What is the function of a NOT gate in digital electronics?

• It outputs the same value as the input.

• It outputs the opposite value of the input.

• It adds two input values.

• It multiplies two input values.

How many inputs and outputs does a NOT gate have?

• 2 inputs and 1 output

• 1 input and 2 outputs

• 1 input and 1 output

• 2 inputs and 2 outputs

If the input (A) to a NOT gate is 1, what will be the output?

• 1

• 0

• 2

• Undefined

Using the truth table, explain how the NOT gate can be used to invert a signal in a circuit.

• By making the output equal to the input.

• By making the output always 1.

• By making the output always 0.

• By making the output the opposite of the input.

Which of the following statements best describes the function of an AND gate?

• It outputs true if at least one input is true.

• It outputs true only if both inputs are true.

• It outputs true if both inputs are false.

• It outputs true if only one input is true.

Given the truth table for an AND gate, what will be the output if input A is 1 and input B is 0?

• 1

• 0

• 2

• Cannot be determined

If you want an AND gate to output true, what must be the values of its two inputs?

• Both inputs must be false.

• One input must be true and the other false.

• Both inputs must be true.

• Any input can be true.

How would you use the AND gate in a real-world scenario where you need a device to turn on only when two switches are pressed at the same time?

• Connect the device to only one switch.

• Use an OR gate instead of an AND gate.

• Connect both switches to the inputs of the AND gate, and the output to the device.

• Connect the device to both switches directly without any gate.

What is the main function of an OR gate in digital logic?

• It outputs true only if both inputs are true.

• It outputs true if one or both inputs are true.

• It outputs false if one or both inputs are true.

• It outputs true only if both inputs are false.

How many inputs and outputs does an OR gate have?

• 1 input and 2 outputs

• 2 inputs and 1 output

• 2 inputs and 2 outputs

• 1 input and 1 output