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Arithmetic Circuits – 1 – 2

 

6. It is used to subtract two inputs having more than one bit :

(a) Half Subtractor 
(b) Full Subtractor
(c) Half Adder 
(d) Full Adder

ANSWER

EXPLANATION

7. BCD-to-Excess-3 Code Conversion is a example of a _________.

(a) 2- bit Parallel Adder 
(b) 4-bit Parallel Adder 
(c) Sum-of-Products 
(d) Products-of-Sum

ANSWER

EXPLANATION

8. The gates required to build a half adder are :

(a) EX-OR gate and NOR gate
(b) EX-OR gate and OR gate
(c) EX-OR gate and AND gate
(d) Four NAND gates

ANSWER

EXPLANATION

9. A full adder logic circuit will have :

(a) Two inputs and one output
(b) Three inputs and three outputs
(c) Two inputs and two outputs
(d) Three inputs and two outputs

ANSWER

EXPLANATION

10. The fast carry or look-ahead carry circuits found in most 4-bit parallel-adder circuits :

(a) add a 1 to complemented inputs
(b) increase ripple delay
(c) reduce propagation delay
(d) determine sign and magnitude

ANSWER

EXPLANATION

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