81 Understanding Logic Gates for GCSE

What is the primary use of logic gates in electric circuits?

• To conduct electricity

• To process data

• To store data

• To generate power

What does a NOT gate do to its input?

• Reverses the input

• Combines two inputs

• Duplicates the input

• Deletes the input

For an AND gate to output a 1, what must the inputs be?

• Both 1

• Both 0

• At least one 0

• At least one 1

What is necessary for an AND gate to output a 0?

• Both inputs are 0

• At least one input is 1

• Both inputs are 1

• At least one input is 0

What is true about the OR gate's output when both inputs are 0?

• Output is 0

• Output is undefined

• Output alternates

• Output is 1

How does an OR gate output a 1?

• When both inputs are 0

• When at least one input is 1

• When inputs are alternating

• Only when both inputs are 1

How can you visually remember an OR gate?

• It looks like the letter 'O'

• It looks like the letter 'D'

• It looks like the letter 'T'

• It looks like the letter 'A'

What is the output of a NAND gate if both inputs are 1?

• The output is undefined

• 0

• 1

• The output alternates

What distinguishes an XOR gate from an OR gate?

• There is no difference

• XOR outputs 1 only if one input is 1 and the other is 0

• XOR outputs 1 only if both inputs are 0

• XOR outputs 1 only if both inputs are 1

Which gate is described as NOT OR?

• NOR

• XOR

• NAND

• AND