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Digital Electronics

Digital Electronics
In Boolean algebra, the bar sign (-) indicates ___________.

NOT operation
OR operation
AND operation
None of these

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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
 2:1
 1:2

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Digital Electronics
When will be the output of an AND gate is HIGH if there are three inputs, A, B, and C ?

 A = 0, B = 0, C = 0
 A = 1, B = 0, C = 1
 A = 1, B = 1, C = 1
 A = 1, B = 1, C = 0

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Digital Electronics
In decimal number system what is MSD

 Mean of all digits
 Middle digit
 First digit from left to right
 First digit from right to left

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Digital Electronics
Why decoder is used in the digital electronics ?

None of these
 To convert non coded information into coded form
 To convert coded information into non coded form
 It is used to separate address bus and data bus

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Digital Electronics
A 16-square eliminates

 3 variables
 4 variables
 8 variables
 2 variables

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