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Digital Electronics

Digital Electronics
In which code do the successive code characters differ in only one position?

 Gray code
 8421 code
 XS-3 code
 Hamming code

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Digital Electronics
How many output is high of NOR GATE ?

 4
 3
 1
 2

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Digital Electronics
Consider the following multiplication: (10w1z) × (15)10 = (y01011001)2 Which one of the following gives appropriate values of w,y and z?

 w = 1,y = 1,z = 1
 w = 0,y = 0,z = 1
 w = 1,y = 1,z = 0
 w = 0,y = 1,z = 1

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Digital Electronics
Truth table is used to express

 Boolean matrix
 Boolean expression
 Boolean map
 Boolean addition

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 OR
 AND
 NOT
 NAND

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Digital Electronics
What is the minimum number of NOR gates required realizing an X-OR gating?

 5
 3
 6
 4

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