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Digital Electronics

Digital Electronics
Consider the operation 24+17 = 40 .What is the correct base of number so that operation is correct?

 12
 13
 10
 11

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

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

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Digital Electronics
The number of digit 1 present in the binary representation of (3 × 512 + 7 × 64 + 5 × 8 + 3) is

 9
 7
 8
 6

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

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

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Digital Electronics
A read only memory in which the present contents must be erased before the new information can be stored is

 ROM
All of these
 EAROM
 PROM

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Digital Electronics
NAND. gates are preferred over others because these

have lower fabrication area
consume least electronic power
can be used to make any gate
provide maximum density in a chip.

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