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Digital Electronics

Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 NAND
 X-NOR
 X-OR
 NOR

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

 an OR or a NAND
 a NAND or a NOR
 an AND or an X-NOR
 an X-OR or an X-NOR

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Digital Electronics
The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

 X-OR
 NOR
 OR
 NAND

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:3
 1:2
 1:1
 2:1

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Digital Electronics
An n variable K-map can have

 2n cells
  nn cells
 n2n cells
 n2 cells

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Digital Electronics
The output of a logic gate is 0 when all its inputs are at logic 1. The gate is either

 a NAND or an X-OR
 a NOR or an X-NOR
 a NAND or an AND
 a NAND or an X-NOR

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