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Digital Electronics

Digital Electronics
A device which converts decimal number into BCD form is called

 decoder
 multiplexer
 code converter
 encoder

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

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

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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

 OR
 AND
 NOR
 NAND

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Digital Electronics
What is the 2’s complement of 10110000?

 10110000
 01010000
 01001111
 10001110

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Digital Electronics
The 1’s complement of 11010111 is

 11101000
 10101000
 10101000
 00101000

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 –1.5 V and – 0.5 V
 0 V and 5 V
 5 V and 0 V
 1 V and 5 V

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