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Digital Electronics

Digital Electronics
A group of four bits is known as

 Nibble
 Word
 Bit
 Byte

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

 AND
 NAND
 OR
 NOR

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Digital Electronics
Which of the following is not a transmission medium?

 Microwave systems.
  Modem.
 Coaxial cables.
 Telephone lines.

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Digital Electronics
An AND gate will function as OR if

All the inputs are ‘0’
Either of the inputs is “1”
All the inputs and outputs are complemente'
All the inputs to the gates are “1”

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Digital Electronics
(11011) 2 in BCD 8421 code is

 00011011
 01101100
 00100111
 11011001

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Digital Electronics
The voltage levels for negative logic system

 must necessarily be negative
 must necessarily be 0 V and –5 V
 may be negative or positive
 must necessarily be positive

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MORE MCQ ON Digital Electronics

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