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Logic Gates – 1 – 3

11. An AND gate will function as OR if :

(a) All the inputs to the gates are “1”
(b) All the inputs are ‘0’
(c) Either of the inputs is “1”
(d)
 All the inputs and outputs are complemented

ANSWER

EXPLANATION

12. NAND gates are preferred over others because these :

(a) Have lower fabrication area
(b) Can be used to make any gate
(c) Consume least electronic power
(d) 
Provide maximum density in a chip

ANSWER

EXPLANATION

13. In case of OR gate, no matter what the number of inputs.

(a) A 1 at any input causes the output to be at logic 1
(b) A 1 at any input causes the output to be at logic 0
(c) A 0 at any input causes the output to be at logic 0
(d) A 0 at any input causes the output to be at logic 1

ANSWER

EXPLANATION

14. The output of a ……… gate is only 1 when all of its inputs are 1.

(a) NOR
(b) XOR
(c) AND
(d) 
NOT

ANSWER

EXPLANATION

15. Which of these are universal gates :

(a) Only NOR
(b) Only NAND
(c) Both NOR and NAND
(d) 
Neither NOR nor NAND

ANSWER

EXPLANATION

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