16. A NAND gate is equivalent to an AND gate plus a ……….. gate put together.
17. From a four-input OR gate the number of input condition, that will produce HIGH output are :
18. Which of the following combinations of gates cannot implement all Boolean functions ?
(a) AND, OR, NOT
19. A buffer is :
(a) Always non-inverting
(b) Always inverting
(c) Inverting or non-inverting
(d) None of above
20. To implement Y = ABCD using only two-input NAND gates, minimum number of requirement of gate is :
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