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In which operation carry is obtained?

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In which operation carry is obtained?

(a) Subtraction

(b) Addition

(c) Multiplication

(d) Both addition and subtraction

I got this question in examination.

The above asked question is from Half Adder & Full Adder in portion Arithmetic Circuits of Digital Circuits

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The correct answer is (b) Addition

The explanation is: In addition, carry is obtained. For example: 1 0 1 + 1 1 1 = 1 0 0; in this example carry is obtained after 1st addition (i.e. 1 + 1 = 1 0). In subtraction, borrow is obtained. Like, 0 – 1 = 1 (borrow 1).

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