Punjab 9th Class Computer Model Paper 6 MCQs Test Online

Question 1 of 30

Computer Science

1. In Boolean algebra A + A is equal to =

1.A

2.1

3.O

4.+

Question 1 of 30

Question 2 of 30

2. In Boolean algebra ____A.B is equal to:

1.0

2.B

3.1

4.A

Question 2 of 30

Question 3 of 30

3. In Boolean algebra______ A.A is equal to:

1.0

2.A

3.O

4.1

Question 3 of 30

Question 4 of 30

4. In Boolean algebra the identity element with respect to Dot (.) is equal to?

1.–

2.0

3.+

4.1

Question 4 of 30

Question 5 of 30

5. Who established another method for simplifying a Boolean expression?

1.Pascal

2.Maurice Karnaugh

3.George Boolean

4.Charles Babbage

Question 5 of 30

Question 6 of 30

6. In Boolean algebra______ x + x is equal to :

1.1

2.0

3.2

4.3

Question 6 of 30

Question 7 of 30

7. Which of the following logical operator is denoted by + sign?

1.AND

2.OR

3.NOR

4.NOT

Question 7 of 30

Question 8 of 30

8. A Boolean Function with 3 variables will have:

1.2 maxterms

2.4 maxterms

3.8 maxterms

4.16 maxterms

Question 8 of 30

Question 9 of 30

9. In Boolean algebra A.1 is equal to:

1.0

2.A

3.B

4.1

Question 9 of 30

Question 10 of 30

10. Which of the following is a proposition?

1.None of these

2.Are you male?

3.What is your father?

4.What is your name?

Question 10 of 30

Question 11 of 30

11. In Boolean algebra, A+1=?

1.1

2.x

3.A

4.0

Question 11 of 30

Question 12 of 30

12. Demorgan’s Law states that:

1.a+b = a.b

2.a (b + c) = a.b+a.c

3.None of above

4.a + (b+c) = (a+b)+c

Question 12 of 30

Question 13 of 30

13. System of involution is:

1.x . y

2.x

3.x + y

4.xy

Question 13 of 30

Question 14 of 30

14. In the Boolean equation x = A-B the term AB is read as:

1.Multiplied

2.AND

3.Logical 0 and 1

4.A or B

Question 14 of 30

Question 15 of 30

15. With n variables, we can construct minterms.

1.2⁰

2.2¹

3.2ⁿ

4.3³

Question 15 of 30

Question 16 of 30

16. When was Boolean algebra introduced?

1.1922

2.1947

3.1847

4.1942

Question 16 of 30

Question 17 of 30

17. How many maxterms are in Boolean Function with four variables?

1.24

2.32

3.16

4.08

Question 17 of 30

Question 18 of 30

18. The most important application of Boolean algebra is in:

1.Digital Logic

2.Natural Science

3.Computer Software

4.System Software

Question 18 of 30

Question 19 of 30

19. The idempotent law states that for two variables x and y.

1.x = x

2.x+x.y=x+y and x.(x+y)

3.x.x=x and x+x=x

4.None of these

Question 19 of 30

Question 20 of 30

20. K-map with 3 variables:

1.8 cells

2.2 cells

3.16 cells

4.4 cells

Question 20 of 30

Question 21 of 30

21. The additive identity element is:

1.0

2.1

3.‘,’

4.‘+’

Question 21 of 30

Question 22 of 30

22. Who developed Boolean algebra?

1.Chales Babbage

2.George Boole

3.Dennis Retchie

4.Von Neuman

Question 22 of 30

Question 23 of 30

23. OR operator of Boolean algebra is denoted by:

1.*

2..

3.–

4.+

Question 23 of 30

Question 24 of 30

24. Boolean algebra deals with:

1.Binary Digits

2.Hexadecimal Digits

3.Decimal Digits

4.Octal Digits

Question 24 of 30

Question 25 of 30

25. Boolean algebra has exactly the same structure as:

1.None of these

2.Propositional Calculus

3.Ordinary Algebra

4.Mathematical Calculus

Question 25 of 30

Question 26 of 30

26. In Boolean algebra _____¬ A+0 is equal to:

1.A

2.0

3.B

4.1

Question 26 of 30

Question 27 of 30

27. The absorption law states that for two variables x and y.

1.x.y=y.x

2.x+x.y=x.+y and x.(x+y)=x

3.x.x=x and y.y = y

4.None of these

Question 27 of 30

Question 28 of 30

28. K-Map is used to:

1.Both a and b

2.Simplify a Boolean expression

3.None of above

4.Evaluate a Boolean expression

Question 28 of 30

Question 29 of 30

29. In Boolean algebra AND operator is denoted as:

1.+

2..

3.*

4.–

Question 29 of 30

Question 30 of 30

30. Logical state can be only _____ or a 0:

1.3

2.2

3.0

4.1

Question 30 of 30

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