Computer Systems Recap

What is the main function of a NOT gate in digital logic?

• 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

According to the truth table for a NOT gate, what is the output if the input (A) is 1?

• 1

• 0

• 2

• Cannot be determined

If the output of a NOT gate is 1, what must the input be?

• 1

• 0

• 2

• Cannot be determined

A student claims that a NOT gate can be used to invert a digital signal. Using the information from the truth table, explain if this claim is correct.

• Yes, because the output is always the same as the input.

• No, because the output is always 1.

• Yes, because the output is always the opposite of the input.

• No, because the output is always 0.

What is the minimum number of inputs required for an AND gate?

• 1

• 2

• 3

• 4

According to 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

Which statement 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 any input is false.

If you want an output of 1 from an AND gate, what must be the values of both inputs?

• Both inputs must be 0

• One input must be 1 and the other 0

• Both inputs must be 1

• Any value of inputs will work

A student claims that an AND gate will output 1 if either input A or input B is 1. Use the truth table to explain if this claim is correct or incorrect.

• Correct, because the output is 1 if either input is 1

• Incorrect, because the output is 1 only if both inputs are 1

• Correct, because the output is always 1

• Incorrect, because the output is always 0