Logic Gates

How many types of logic gates are there?

• Seven

• Five

• Ten

• Three

Answer explanation

There are seven types of logic gates. This is the correct answer choice.

Who made the logic gate?

Hint: He worked out a system to solve logic problems (1815-64).

• George Boole

• Leonardo da Vinci

• Isaac Newton

• Thomas Edison

Answer explanation

George Boole made the logic gate. He developed a system to solve logic problems in the 19th century.

There are two things in logic gates which are...

• input and output

• up and down

• left and right

• start and end

Answer explanation

Logic gates have two things: input and output. The correct choice is 'input and output'.

What can you create with logic gates to perform a whole range of advanced functions?

• Digital circuit

• Air circuit

• Water circuit

• Analog circuit

Answer explanation

Logic gates can be used to create a digital circuit, which can perform a wide range of advanced functions.

Which gate is known as "inverters"?

• NOT gate

• NAND gate

• OR gate

• AND gate

Answer explanation

The gate known as 'inverters' is the NOT gate. It reverses the input signal, making it the correct choice.

Which gate switch their output signal "on" only when both input signals are "on"?

• OR gate

• AND gate

• NAND gate

• XOR gate

Answer explanation

The AND gate switches its output signal 'on' only when both input signals are 'on'. This makes it the correct choice.

Which gate only gives an "on" output when one input is "on" and the other is "off"?

• NAND gate

• XOR gate

• AND gate

• OR gate

Answer explanation

The XOR gate only gives an 'on' output when one input is 'on' and the other is 'off'. This makes it the correct choice for the given question.

Which gate produces an "on" output when either one of the inputs is "on", or when both are "on"?

• XOR gate

• AND gate

• NAND gate

• OR gate

Answer explanation

The OR gate produces an 'on' output when either one of the inputs is 'on', or when both are 'on'. This makes it the correct choice for this question.

In a XOR gate, Inputs 1 and 1 = output ...

What is the output?

• 3

• 0

• 2

• 1

Answer explanation

In a XOR gate, when both inputs are the same, the output is 0. Therefore, the correct output for inputs 1 and 1 is 0.

What is the logic gate from the following image?

• OR gate

• NAND gate

• NOT gate

• AND gate

Answer explanation

The logic gate in the image is a NOT gate. It is used to invert the input signal. The other options are incorrect as they do not match the gate in the image.