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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?

 2:3
 1:1
 1:2
 2:1

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Digital Electronics
Which one of the following even parity codes are in errors. (I)100110010 (II)011101010 (III)10111111010001010

 Both (II)&(III)
 Only (II)
 Both (I)&(III)
 Only (III)

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Digital Electronics
What will be the Boolean expression for an inverter logic gate, where input is A and output is G ?

 G = Ā
None of these
 A= G
 G = A

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Digital Electronics
How many NOR gates are required to obtain AND operation?

 3
 2
 4
 1

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Digital Electronics
A + Ā is equal to

 1
 0
 A
 Ā

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Digital Electronics
The number of parity bits in a 12-bit Hamming code is

 5
 4
 8
 6

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