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Digital Electronics

Digital Electronics
A combinational circuit can be designed using only

 AND gates
 NOR gates
 OR gates
 OR and X-NOR gates

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Digital Electronics
When will be the output of an exclusive-OR gate is HIGH ?

 All inputs are LOW
 The inputs are equal
 The inputs are different
 All inputs are HIGH

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Digital Electronics
If in a base b number system, 54/4=13, the base of the number is

 8
 9
 6
 7

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Digital Electronics
A + Ā is equal to

 Ā
 0
 A
 1

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Digital Electronics
The voltage levels for positive logic system

 must necessarily be 0 V and 5 V
 must necessarily be positive
 must necessarily be negative
 may be positive or negative

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Digital Electronics
(44)8 in BCD 8421 code is

 01000100
 01100011
 00110110
 00100100

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