Carry lookahead logic uses the concepts of ___________(a) Inverting the inputs(b) Complementing the outputs(c) Generating and propagating carries(d) Ripple factorThis question was posed to me in an interview for internship.I'd like to ask this question from 4-Bit Parallel Adder/Subtractor in chapter Arithmetic Circuits of Digital Circuits

Carry lookahead logic uses the concepts of ___________(a) Inverting th

1.	Carry lookahead logic uses the concepts of ___________(a) Inverting the inputs(b) Complementing the outputs(c) Generating and propagating carries(d) Ripple factorThis question was posed to me in an interview for internship.I'd like to ask this question from 4-Bit Parallel Adder/Subtractor in chapter Arithmetic Circuits of Digital Circuits
Answer» Correct option is (c) Generating and propagating carries To explain: LOOK Ahead Carry Adder is a TYPE of digital circuit which reduces the propagation DELAY. Carry lookahead logic uses the concepts of generating and propagating carries. Although in the context of a carry lookahead adder, it is most NATURAL to think of generating and propagating in the context of binary addition, the concepts can be USED more generally than this.

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