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Logic Gates – 1 – 4

16. A NAND gate is equivalent to an AND gate plus a ……….. gate put together.

(a) NOR
(b) NOT
(c) XOR
(d) XNOR

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

17. From a four-input OR gate the number of input condition, that will produce HIGH output are :

(a) 0
(b) 1
(c) 3
(d) 15

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

18. Which of the following combinations of gates cannot implement all Boolean functions ?

(a) AND, OR, NOT
(b) NAND
(c) NOR
(d) XOR

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

19. A buffer is :

(a) Always non-inverting
(b) Always inverting
(c) Inverting or non-inverting
(d) None of above

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

20. To implement Y = ABCD using only two-input NAND gates, minimum number of requirement of gate is :

(a) 3
(b) 4
(c) 5
(d) 6

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

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