Question 29

The logic circuit of binary adder which is used to add two 4-bits binary numbers, requires ______ half adder (s) and ______ full adder (s).

  1. A4 , 0
  2. B1 , 3
  3. C2 , 2
  4. D3 , 1
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Correct answer: (B) 1 , 3

Explanation

A 4-bit parallel (ripple-carry) adder uses one half adder for the least significant bit, which has no carry-in, and three full adders for the other three bits.

From DSSSB TGT Computer Science Practice Set 3

This is question 29 of DSSSB TGT Computer Science Practice Set 3. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.