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Digital Electronics

Digital Electronics
Maximum number in decimal that can be represented by 4 bits (binary) is

 7
 4
 15
 16

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Digital Electronics
In Boolean algebra AND is represented by

 ×
 -
 /
 +

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Digital Electronics
For a code to be self-complementing, the sum of all its weights must be

 9
 10
 12
 6

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Digital Electronics
Which one of the following is 2’s complement of -68?

 01111100
 11000100
 00111100
 10111100

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=0, R=1
 S=1, R=1
 S=1, R=0
 S=0, R=0

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Digital Electronics
OR-AND realization of a combinational circuit is equivalent to

 NOR-NAND realization
 NAND-NAND realization
 NOR-NOR realization
 NAND-NOR realization

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