10.1 Logic Gates Cambridge IGCSE 0478

What is the function of an AND gate?

• Outputs 1 only if both inputs are 1.

• Outputs 1 if at least one input is 1.

• Outputs 0 only when both inputs are 1.

• Always outputs the inverse of the input.

Which logic gate always outputs the inverse of the input?

• NOT

• AND

• OR

• XOR

What is the output of an OR gate when both inputs are 0?

• 0

• 1

• It depends on the circuit.

• Cannot be determined.

Which logic gate produces an output of 1 when both inputs are 0?

• NOR

• AND

• XOR

• OR

What is the Boolean expression for an XOR gate?

• A⊕B=(A⋅NOT(B))+(NOT(A)⋅B)

• A+B

• A⋅B

• NOT(A)

Which gate produces an output of 1 only when both inputs are different?

• XOR

• AND

• OR

• NOR

How does a NAND gate behave?

• It is the opposite of an AND gate (outputs 0 only if both inputs are 1).

• It is the opposite of an OR gate.

• It outputs 1 only if both inputs are 1.

• It always outputs 0.

Which logic gate is represented by the following Boolean expression? A·B

• AND

• OR

• XOR

• NOR

What is the correct truth table for an XNOR gate?

• Outputs 1 when inputs are the same, 0 when they are different.

• Outputs 0 when inputs are the same, 1 when they are different.

• Always outputs 1.

What does the following logic circuit do?

• NOR Gate

• AND Gate

• XOR Gate

• NAND Gate