AQA - Section 4 - Introduction to Logic Gates & Circuits

What does a NOT gate do to its input?

• Outputs true if at least one input is true

• Combines two inputs

• Reverses the input

• Outputs true if both inputs are true

What is required for an AND gate to output 1?

• Both inputs are 0

• Either input can be 1 or 0

• At least one input is 1

• Both inputs are 1

What condition must be met for an OR gate to output 1?

• Neither input can be 1

• Both inputs must be 0

• At least one input is 1

• Both inputs must be 1

How does an XOR gate differ from an OR gate when both inputs are 1?

• Both output 1

• Both output 0

• XOR outputs 1, OR outputs 0

• XOR outputs 0, OR outputs 1

What is the output of an AND gate if only one input is 1?

• The output alternates between 0 and 1

• The output is undefined

• 0

• 1

Which logic gate is described as having the curve form the right-hand side of the letter 'O'?

• NOT gate

• OR gate

• AND gate

• XOR gate

What additional logic gates are introduced beyond GCSE level?

• NAND and NOR gates

• AND and OR gates

• NOR and XOR gates

• NOT and NAND gates

What is the function of a NAND gate?

• Reverses the output of an AND gate

• Outputs 1 if both inputs are 1

• Outputs 0 if both inputs are 1

• Outputs 1 if at least one input is 0

How many inputs do the basic logic gates take?

• Only two

• Two or three

• One or two

• Only one

What is the correct representation for an XOR gate?

• A gate with a simple curve

• A gate with a curve and a line crossing through the middle

• A gate that looks like the letter 'D'

• A gate that looks like the letter 'T'