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Digital Electronics

Digital Electronics
The number of parity bits in a 12-bit Hamming code is

 4
 5
 6
 8

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

 NOT
 OR
 NAND
 AND

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Digital Electronics
A bubbled OR gate is equivalent to a

 X-OR gate
 NAND gate
 NOR gate
 AND gate

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

 0 and 3
 1 and 3
 1 and 4
 0 and 4

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Digital Electronics
The AND-OR realization of a combinational circuit requires three 3-input AND gates and one 3-input OR gate. This circuit can be designed using

 three 3-input OR gates and one 3-input AND gate
 three 3-input NAND gates and one 3-input NOR gate
 four input NAND gates only
None of these

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

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

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