MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Full Adder, Decoder. A full adder adds two binary numbers (A, B) together and includes provision for a carry in bit (Cin) and a carry out bit (Cout). A decoder accepts a binary encoded number as input and puts a logic 1 on the corresponding output line.

Detailed explanation-2: -A full adder circuit is central to most digital circuits that perform addition or subtraction. It is so called because it adds together two binary digits, plus a carry-in digit to produce a sum and carry-out digit.

Detailed explanation-3: -Full adder or no full adder, carry is a mathematical concept. It is the extra bit (or digit) which is generated every time an addition of two N-digit numbers results in a sum with N+1 digits. For example, two 1 digit numbers 5 and 7 results in a 2-digit sum, 12. In this case, the leftmost ‘1’ is the carry.

Detailed explanation-4: -2)Full Adder Two of the three bits are same as before which are A, the augend bit and B, the addend bit. The additional third bit is carry bit from the previous stage and is called ‘Carry’ – in generally represented by CIN. It calculates the sum of three bits along with the carry.