Virtual Labs

Computer Science and Engineering Computer Organisation and Architecture Lab Experiments

Aim

Theory

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Procedure

Simulation

Posttest

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Carry Look Ahead Adder

Choose difficulty:

Beginner

Intermediate

Advanced

What distinguishes the look-ahead-carry adder?

a: It requires advance knowledge of the final answer Explanation

Explanation

b: It is faster than a ripple-carry adder Explanation

Explanation

c: It is slower than the ripple-carry adder Explanation

Explanation

d: It is easier to implement logically than a full-adder Explanation

Explanation

The number of full and half-adders required to add 16-bit numbers is

a: 1 half-adder, 5 full-adders Explanation

Explanation

b: 4 half-adders, 12 full-adders Explanation

Explanation

c: 8 half-adders, 8 full-adders Explanation

Explanation

d: 16 half-adders, 0 full-adders Explanation

Explanation

What is the disadvantage of ripple-carry adder?

a: More stages are required to a full-adder Explanation

Explanation

b: The interconnections are more complex Explanation

Explanation

c: It is slow due to propagation time Explanation

Explanation

d: All of the above are correct Explanation

Explanation

The MOST commonly used system for representing signed binary numbers is the

a: 2's-complement system Explanation

Explanation

b: 1's-complement system Explanation

Explanation

c: 10's-complement system Explanation

Explanation

d: Sign-magnitude system Explanation

Explanation

Ripple carry delay is increased in carry-look-ahead adder

a: True Explanation

Explanation

b: False Explanation

Explanation

Carry of a full adder is a symmetric function

a: True Explanation

Explanation

b: False Explanation

Explanation

The time and space complexity of ripple carry adder are respctively

a: O(n), O(nlogn) Explanation

Explanation

b: O(n), O(1) Explanation

Explanation

c: O(n), O(n) Explanation

Explanation

d: O(logn), O(nlogn) Explanation

Explanation

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