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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?

 1:2
 2:1
 1:1
 2:3

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Digital Electronics
Logic circuits are

 none of these
 hybrid circuits
 digital circuits
 analog circuits

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Digital Electronics
The number of digit 1 present in the binary representation of (3 × 512 + 7 × 64 + 5 × 8 + 3) is

 6
 8
 9
 7

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Digital Electronics
The code used for labeling the cells of a K-map is

 gray
 hexadecimal
 octal
 8-4-2-1 binary

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Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 0 and 4
 1 and 4
 1 and 3
 0 and 3

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Digital Electronics
A Nibble is equal to ________ bit(s)

 1
 4
 8
 2

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