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Digital Electronics

Digital Electronics
A multiplexer is a combinational logic circuit used to perform the operation

 AND-AND
 NOR-OR
 XOR-NAND
 AND-OR

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Digital Electronics
The output of a NOR gate is high

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

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

Base 3
Base 10
Base 8
Base 16

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Digital Electronics
The 1’s complement of 11010111 is

 00101000
 10101000
 10101000
 11101000

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Digital Electronics
Which of the following is 1’s complement representation of +57

 00111001
 00000001
 01000110
 11000110

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Digital Electronics
When an input signal 1 is applied to a NOT gate, the output is ___________.

1
Either 0 & 1
None of these

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