# Boolean Algebra – Exercise – 1

1. In a digital control system, there are three inputs a,b,c. The output should be present when at least two inputs are present.
The Boolean expression for the output is :

(a)
(b)
(c)
(d)

Answer
Answer : (a)
Explanation
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2. Simplified form of :

(a)
(b)
(c)
(d)

Answer
Answer : (a)
Explanation
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3. Two binary signals a,b are to be compared. The output expression when the two signals are equal is given by :

(a)
(b)
(c)
(d)

Answer
Answer : (b)
Explanation
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4. The Boolean expression for the sub-class(R) of all digital electronics instruments which are not measuring instruments and have no battery supply is :

(a)
(b)
(c)
(d)

Answer
Answer : (c)
Explanation
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5. The minimum Boolean expression for the circuit shown below : (a) XY+XZ+YZ
(b) X+YZ
(c) X+Y
(d) X+Y+Z
Answer
Answer : (d)
Explanation
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