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Digital Electronics

Digital Electronics
What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate?

 one
 four
 two
 three

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Digital Electronics
When will be the output of an AND gate is HIGH if there are three inputs, A, B, and C ?

 A = 0, B = 0, C = 0
 A = 1, B = 1, C = 1
 A = 1, B = 0, C = 1
 A = 1, B = 1, C = 0

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Digital Electronics
When will be the output of an OR gate is LOW ?

 When all inputs are HIGH
 When all input is LOW
 When any input is HIGH
 When any input is LOW

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Digital Electronics
The universal gate is ___________

None of these
OR gate
NAND gate
AND gate

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Digital Electronics
A + Ā is equal to

 A
 0
 Ā
 1

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Digital Electronics
The following code is not a BCD code.

 Gray code
 all of these
 XS-3 code
 8421 code

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