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Digital Electronics

Digital Electronics
The following code is not a BCD code.

 8421 code
 XS-3 code
 all of these
 Gray code

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Digital Electronics
Temperature variation is a/an

 Analog quantity
 Digital quantity
 Either Digital or Analog quantity
 None

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Digital Electronics
Digital computers are more widely used as compared to analog computers, because they are

Less expensive
Always more accurate and faster
Useful over wider ranges of problem types
Easier to maintain

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 2’s complement is used to represent the numbers, then the range will be

 -256 to 256
 -256 to 255
 -128 to 127
 -128 to 128

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Digital Electronics
The 1’s complement of 11010111 is

 10101000
 00101000
 10101000
 11101000

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

Base 3
Base 8
Base 16
Base 10

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