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Digital Electronics

Digital Electronics
A demultiplexer is a

 N-to-1 device
 1-to-N device
 1-to-1 device
 N-to-N device

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Digital Electronics
The voltage levels for negative logic system

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

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Digital Electronics
How many input and output required for multiplexer ?

 Many input and one output
 One input and many output
 One input and one output
None of these

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Digital Electronics
Which one of the following is not a vectored interrupt?

 RST 7.5.
 TRAP.
 RST 6.5.
 INTR.

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -7, -7 and -7 respectively
 -6, -6 and -6 respectively
 25, 9 and 57 respectively
 -25, -9 and -57 respectively

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Digital Electronics
The fast logic family is

  ECL.
  TTL.
  DRL.
  TRL.

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