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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

Explanation
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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

Explanation
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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

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

(a) NOR
(b) XOR
(c) AND
(d) NOT

Explanation
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15. Which of these are universal gates :

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