# MCQ IN COMPUTER SCIENCE & ENGINEERING

## COMPUTER SCIENCE AND ENGINEERING

### DIGITAL LOGIC

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many logic gates are used in a half adder?
 A none B 1 C 2 D 3
Explanation:

Detailed explanation-1: -A Half Adder consists of only one AND gate and EX-OR gate. A Full Adder consists of one OR gate and two EX-OR and AND gates. There are two inputs in a Half Adder-A and B.

Detailed explanation-2: -12.2 The half adder The four possible combinations of two binary digits A and B are shown in Figure 12.1(b).

Detailed explanation-3: -The half adder determines the least significant bit of the sum as the XOR of the least significant bits of the inputs. The carry output of the half adder becomes the carry input of the full adder. The full adder computes the sum of the inputs A1 and A2 and the carry bit. Example: A=3 (11) and B=1 (01): S0=0.

Detailed explanation-4: -2-Bit Full Adder using Logic Gates in Proteus.

Detailed explanation-5: -Techopedia Explains Half Adder The adder works by combining the operations of basic logic gates, with the simplest form using only a XOR and an AND gate.

There is 1 question to complete.