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Digital Electronics

Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 8
Base 16
Base 3
Base 10

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

 NAND
 X-NOR
 NOR
 AND

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Digital Electronics
All the integers and decimal numbers are represented by

 odd numbers
 even numbers
 whole numbers
 real numbers

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Digital Electronics
Which of the following gate is a two-level logic gate

NAND gate
EXCLUSIVE OR gate
OR gate
NOT gate

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Digital Electronics
What are the values of R1 and R2 respectively in the expression (235)R1 = (565)10 = (1065)R2

 16, 8
 12, 8
 6, 16
 8, 16

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Digital Electronics
The output of a NAND gate is low

 only when at least one input is low
 only when all the inputs are high
 only when all the inputs are low
 only when at least one input is high

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