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Digital Electronics

Digital Electronics
How many numbers are used in the decimal number system?

None of these
 1 to 10
 0 to 10
 0 to 9

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Digital Electronics
A device which converts BCD into octal is called

 decoder
 demultiplexer
 encoder
 code converter

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

 an OR or a NAND
 a NAND or a NOR
 an AND or an X-NOR
 an X-OR or an X-NOR

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Digital Electronics
Positive integers must be represented by

 signed numbers
 unsigned number
 None of these
 Both A and B

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Digital Electronics
Which number system has a base of 16

 Hexadecimal
 None
 Octal
 Decimal

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Digital Electronics
The 1’s complement of 11010111 is

 11101000
 10101000
 00101000
 10101000

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