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Digital Electronics

Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 8
Base 16
Base 3
Base 10

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Digital Electronics
The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

 NOR
 NAND
 OR
 X-OR

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Digital Electronics
The data bus width of a ROM of size 2048 × 8 bits is

 10
 8
 16
 12

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Digital Electronics
Fastest memory element is

 Hard Drive
 RAM
 Cache
 ROM

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

 7
 15
 4
 16

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

 255
 8
 128
 256

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