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Digital Electronics

Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:1
 1:1
 2:3
 1:2

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Digital Electronics
A three-state buffer has the following output states

 Set, Reset, Halt
 High, Low, Float
 Both A and B
 1, 0, float

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Digital Electronics
The hex address of the 256th memory location is

 001FF
 000FF
 00FFF
 00100

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Digital Electronics
Boolean algebra is also known as

 Gate algebra
 Switching algebra
 Transistor algebra
 Counting algebra

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Digital Electronics
An X-OR gate gives a high output

 for odd decimal value.
 if it has even number of 0s
 if the decimal value of digital word is even
 if there are odd number of 1s

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

Base 8
Base 3
Base 16
Base 10

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