Computer science class ix notes 9th class board pattern model paper
Computer science Chapter No-06 Important questions, if you attempt these question you will get InshaAllah 100% marks.
(Chapter-06 Boolean Algebra) Important MCQs
Q.1: Choose the correct option:
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1. Boolean algebra is the algebra of:
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A. Symbols
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B. Logic
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C. Words
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D. None of them
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2. Who formulated Boolean Algebra:
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A. Mark Boole
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B. David Boole
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C. George Boole
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D. None of them
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3.A Series Circuit
can be represented by:
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A. OR operator
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B. AND operator
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C. NOT operator
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D. None of them
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4. Which commutative operator is not valid:
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A.
a + b = b + a
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B. a . b = b . a
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C. a – b = b – a
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D. Both B and C
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5. Remind De Morgan’s law and choose an invalid
statement:
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A .( X + Y )’
= X’ + Y’
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B. ( X . Y )’ = X’ + Y’
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C. ( X + Y )’ = X’ + Y’
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D. None of them
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6. Which is not the valid step of
Duality Principle?
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A. All O’s
charges to 1
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B. All . (dots)
charges to +
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C. All the O’s
charges to
(Zero)
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D. None of them
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7. We can simplify a Boolean function by using:
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A.
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B.
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C. Both A and B
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D. None of them
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8. Each literal represents …….. for a Boolean Function:
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A. Input
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B. Output
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C. Operator
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D. None of them
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9. Product of literal is called:
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A. Max term
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B. Mix term
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C .Function
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D. None of them
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10. If all elements of two Boolean variable function
is one, then the result will be:
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A. 1
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B. Zero
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C. -1
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D. None of them
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11. K-map is used for:
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A. Evaluation
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B. Simplification
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C. Both A and B
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D. None of them
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12.A Boolean function with
four variables will have:
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A. 8 maxterms
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B. 16 maxterms
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C. 24 maxterms
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D. None of them
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13. Which is an efficient way to solve a Boolean
function:
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A. K map
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B. Laws
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C. Axioms
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D. None of them
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14. The disadvantage of K-map is that it’s:
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A. Not Scalable
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B. Not Systematic
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C. Not Applicable
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D. None of them
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15. Boolean Algebra operates on:
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A. Binary Numbers
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B. Decimal Numbers
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C. Octal Numbers
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A. None of them
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Q.2: Answer the following short questions:
- What is Duality Principle?
- What is the difference between Minterm and Maxterm?
- What is K-map?
- Prove that using Truth Table that ( X . Y )’ = X’ + Y’
- Differentiate between Boolean Constant and Boolean Variable.
- What is the precedence of operations to evaluate a Boolean Expression?
- Prove the associate property with respect to AND operation by taking x, y, and z as Boolean Variables.
- Draw a parallel circuit for A and B switches and show the connected Bulb’s ON and OFF states in OR Table.
- Give any two advantages of K-map.
- Give any two disadvantages of Boolean Algebraic Laws.
Q.3: Simplify the
following Boolean Function:
F( x, y) =
x’ . y . z + x’ . y
. z’ + x.
. y
. z +
x . y . z’ +
x . y’ .
z’
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