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Digital Electronics

Digital Electronics
If in a base b number system, 54/4=13, the base of the number is

 7
 9
 8
 6

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Digital Electronics
9’s complement of 52784630 is

 47215369
 57316379
 48225469
 58326479

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Digital Electronics
Which of the following operations is commutative but not associative?

 OR
 NAND
 X-OR
 AND

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Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 X-OR
 NOR
 AND
 NAND

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Digital Electronics
The implicants which will definitely occur in the final expression are called

 redundent prime implicants
 essential prime implicants
 prime implicants
 selective prime implicants

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Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 binary code
 2421 code
 8421 code
 cyclic code

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