Adders and Half Adders CIE A2

A full adder has

• 2 inputs, 2 outputs

• 3 inputs, 2 outputs

• 2 inputs, 1 output

• 3 inputs, 1 output

A half adder has

• 1 input and 1 output

• 2 inputs and 2 output

• 1 input and 2 outputs

• 2 inputs and 1 outputs

How many AND, OR and EXOR gates are required for the configuration of Full Adder?

• 4,0,1

• 2,1,2

• 3,1,2

• 1,2,2

If A and B are the inputs of a half adder, the carry is given by

• A + B

• A.B

• A XOR B

• A XNOR B

Which circuit can be constructed with one XOR and one AND gate?

• Half Adder

• Full Adder

• Full Subtractor

• Multiplexer

What is the purpose of input P in the circuit shown here?

• Sum

• Carry Out

• Carry In

• Reset

What is the purpose of output X in the circuit shown here?

• Sum

• Carry Out

• Carry In

• Reset

What is the purpose of output Y in the circuit shown here?

• Sum

• Carry Out

• Carry In

• Reset

Two half adders can be joined together to make a full adder using which of the folowing logic gates?

• AND

• OR

• NAND

• NOR

• XOE

Adder circuits can be found in the ..

• RAM

• Control Unit

• ALU

• MDR