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Digital Electronics

Digital Electronics
How many bits are required to store one BCD digit ?

 3
 4
 1
 2

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Digital Electronics
A gate is disabled when its disable input is at logic 0. The gate is

 NOR
 OR
 AND
 none of these

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Digital Electronics
Which of the following gates is known as anticoincidence detector?

 OR gate
 AND gate
 X-NOR gate
 X-OR gate

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

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

 Hamming code
 Gray code
 XS-3 code
 8421 code

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

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

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