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Digital Electronics

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?

 1:1
 2:3
 2:1
 1:2

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Digital Electronics
A Nibble is equal to ________ bit(s)

 4
 8
 1
 2

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Digital Electronics
The X-OR and X-NOR gates can have how many inputs?

 any number
 1
 4
 2

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Digital Electronics
One bit full adder has ________ inputs

 any number
 3
 4
 2

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Digital Electronics
A demultiplexer is a

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

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Digital Electronics
The voltage levels for negative logic system

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

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