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Digital Electronics

Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 1 and 3
 0 and 4
 1 and 4
 0 and 3

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

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

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Digital Electronics
How many input and output required for demultiplexer ?

 one input and many output
 number of selection inputs and one output
 one input and one output
None of these

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Digital Electronics
The voltage levels for positive logic system

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

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Digital Electronics
The base of the number system for the addition operation 24 + 14 = 41 to be true is

 6
 7
 5
 8

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Digital Electronics
A demultiplexer is a

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

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