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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Serial and Parallel Adders

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Beginner

Intermediate

Advanced

For a 4-bit parallel adder, if the carry-in is connected to a logical HIGH, the result is __________

a: The same as if the carry-in is tied LOW since the least significant carry-in is ignored Explanation

Explanation

b: That carry-out will always be HIGH Explanation

Explanation

c: A one will be added to the final result Explanation

Explanation

d: The carry-out is ignored Explanation

Explanation

Why XOR gate is called an inverter?

a: Because of the same input Explanation

Explanation

b: Because of the same output Explanation

Explanation

c: It behaves like a NOT gate Explanation

Explanation

d: It behaves like a AND gate Explanation

Explanation

The inverter can be produced with how many NAND gates?

a: 2 Explanation

Explanation

b: 1 Explanation

Explanation

c: 3 Explanation

Explanation

d: 4 Explanation

Explanation

In serial addition, the addition is carried out __________

a: 3 bit per second Explanation

Explanation

b: Byte by byte Explanation

Explanation

c: Bit by bit Explanation

Explanation

d: All bits at the same time Explanation

Explanation

How many shift registers are used in a 4 bit serial adder?

a: 4 Explanation

Explanation

b: 3 Explanation

Explanation

c: 2 Explanation

Explanation

d: 5 Explanation

Explanation

A D flip-flop is used in a 4-bit serial adder, why?

a: It is used to invert the input of the full adder Explanation

Explanation

b: It is used to store the output of the full adder Explanation

Explanation

c: It is used to store the carry output of the full adder Explanation

Explanation

d: It is used to store the sum output of the full adder Explanation

Explanation

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