Question

The one’s complement of 110010101 is:

(a) 001101010

(b) 110010101

(c) 001101011

(d) 110010100

I have been asked this question in an interview for job.

Question is taken from Bitwise topic in division Precedence and Associativity, Bitwise & Boolean of Python

Answer 1

The correct answer is:

(a) 001101010

Explanation:

In the one's complement operation, every bit of a binary number is flipped: all 0s become 1s, and all 1s become 0s.

Given the binary number: 110010101

To find the one's complement, we flip each bit:

• 1 → 0
• 1 → 0
• 0 → 1
• 0 → 1
• 1 → 0
• 0 → 1
• 1 → 0
• 0 → 1
• 1 → 0

So, the one's complement of 110010101 is 001101010.

Hence, the correct option is (a) 001101010.