Question

Full adder is used to-

• A. $2$ bit addition
• B. $3$ bit addition
• C. $4$ bit addition
• D. Addition of unlimited number of bits

Answer 1

The correct option is B $3$ bit addition

A full adder is used to 2-bit addition.

Full adder is a digital circuit that adds three binary no. Out of them one is input carry and outputs sum and output carry. In cascaded from it can be used to add two binary numbers. It is used in ALU in processor chip to perform arithmetic and logical operations.

A Full adder circuit, on a basic level, is used to add 3 bits to give their sum and a carry.