UGC NET CSE | December 2018 | Part 2 | Question: 10

Question

In computers, subtraction is generally carried out by

• A. $9$’s complement
• B. $1$’s complement
• C. $10$’s complement
• D. $2$’s complement

Comments

@Arjun sir I think option d is true because in computers we use binary numbers and in binary numbers 2's complement is used for subtraction.

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Yes, though the option is incomplete. It should have been addition with 2's complement.

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Subtraction is generally carried out by 2 s complement

Option d is correct

Answer 1

In computer we use binary numbers and subtraction can be performed by addition with 2's complement as Arjun sir stated.

So the correct answer is D

https://en.wikipedia.org/wiki/Method_of_complements