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The basic building blocks of the arithmetic unit in a digital computers are ____________

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The basic building blocks of the arithmetic unit in a digital computers are ____________

(a) Subtractors

(b) Adders

(c) Multiplexer

(d) Comparator

This question was posed to me in an interview.

Asked question is from Procedure for the Design of Combinational Circuits in portion Arithmetic Circuits of Digital Circuits

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Correct option is (b) Adders

Explanation: The basic building blocks of the arithmetic unit in a digital computers are adders. Since, a parallel adder is constructed with a number of full-adder circuits connected in cascade. By controlling the data inputs to the parallel adder, it is possible to obtain different types of arithmetic operations.

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