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Digital Electronics

Digital Electronics
Which one of the following is an invalid state in 8-4-2-1 binary coded decimal counter

 1001
 0011
 1100
 1000

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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 = 0,y = 1,z = 1
 w = 1,y = 1,z = 0

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Digital Electronics
A half adder is a ________ circuit.

 Sequential
 None
 Combinational
 Both A and B

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Digital Electronics
The number of Boolean functions that can be generated by n variables is equal to

2n
22n
2n
2n-1

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Digital Electronics
Digital circuit can be made by the repeated use of ___________

NAND gates
NOT gates
None of these
OR gates

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Digital Electronics
The terms which cannot be combined further in the tabular method are called

 essential prime implicants
 prime implicants
 implicants
 selective prime implicants

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