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Digital Electronics

Digital Electronics
The number of rows in the truth table of a 4-input gate is

 16
 4
 12
 8

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Digital Electronics
The decimal equivalent of the highest possible address for an 8-bit address bus is

 128
 256
 255
 8

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 OR
 AND
 NAND
 NOT

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Digital Electronics
To get an excess-3 code from BCD code

 0110 is added
 0110 is subtracted
 0011 is added
 0011 is subtracted

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Digital Electronics
When two n-bit binary numbers are added then the sum will contain at most

 n-bit
 (n + 2)-bit
 (n + 1)-bit
 (n + n)-bit

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Digital Electronics
How many input and output required for multiplexer ?

 One input and many output
None of these
 Many input and one output
 One input and one output

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