Top 500+ 9th Class Computer Science Subject Mcqs Pdf Download Chapter No 06

Print/Downlaod pdf brings to you 500+ 9th Class / Standard Computer Science Mcqs which are new and latest. These Mcqs are never published on internet so far. For full information about all PPSC / FPSC / CSS / PMS latest jobs visit

Top 9th Class Computer Science Subject Mcqs Pdf Download
019th Class Computer Science Chapter 01029th Class Computer Science Chapter 02
039th Class Computer Science Chapter 03049th Class Computer Science Chapter 04
059th Class Computer Science Chapter 05069th Class Computer Science Chapter 06
079th Class Computer Science Chapter 07089th Class Computer Science Chapter 08
Top 500+ New Computer Science Subject MCQs with Answers | Download PDF

Chapter No: 6

Boolean Algebra

Encircle the most appropriate answer from the following options

1:         Boolean algebra was formulated by English Mathematician George Boole in

(a) 1857          

(b) 1853          

(c) 1854          

(d) 1847

2:         If Z is a Boolean variable then its value can be

(a) 0 – 9

(b) 0 – 7

(c) 0 & 1

(d) 0 or 1\

3:         Which of the following are basic logical operators in Boolean algebra?

(a) AND          

(b) OR

(c) NOT          

(d) All

4:         The operator that gives complement of the given value is called

(a) AND

(b) OR

(c) NOT

(d) All

5: If A = 1 and B = 0 then A And B = ?

(a) 0

(b) 10

(c) 11

(d) 1

6:         Boolean Algebra is the __ of logic

(a) Mathematics

(b) Solution

(c) Algebra

(d) Geometry

7:         __ uses symbols to represent logical statements instead of words.

(a) Algebra

(b) Geometry

(c) Boolean Algebra

(d) Digital data

8:         If A = 1,B = 0 then A and B = ?

(a) 0

(b) 10

(c) 11

(d) 1

9:         If  A =1, B=1, C=O then A+B+C = ?

(a) 0

(b) 10  

(c) 01

(d) 1

10:            If A = 1 ,B =0, C = 1 then X = A + B + C

(a) 0

(b) 101   

(c) 1

(d) 10

11:       A + B = B + A and A . B = B. A represents which of the following.

(a) Existence of identity         

(b) Commutative law

(c) Associative law     

(d) Idempotent law

12:       Boolean Algebra was formulated by the                   

(a) Charles Babbage

(b) Napir         

(c) Pascal       

(d) George Boole

13:       According to distributive law A . (B + C ) = ?            

(a) A+(B . C)

(b) (A+B) . (A+C)

(c) A . B + A . C

(d) (A+B) + C

14:       According to Existence of identity element A . 1                  

(a) 1A

(b) 0

(c) A

(d) 1

15:       As per Existence of inverse A + A Z ?                      

(a) 0

(b) 2A

(c) 0

(d) 1

16:       Computer chips are made up of

(a) Transmitters         

(b) Transistors

(c) Circuits    

(d) None

17:       According to inverse the output will be 0 if

(a) A + A

(b) A . A

(c) 1 + A

(d) 0 + A

18:       Boolean Algebra consists of In Boolean Algebra each variable at one time can take how many values?

(a) Variable

(b) Constant

(c) Both

(d) None

19:    AND operator represent   

(a) .

(b) *

(c) /

(d) “”

20:       In Boolean algebra each variable at a time can take how many values?

(a) 1

(b) 2

(c) 3

(d) 4

21:       Which is called an unary operator?

(a) NOT         

(b) AND          

(c) OR

(d) All

22:       All electronic devices consist of circuits of    

(a) Buttons     

(b) Cables      

(c) Elements  

(d) Switches

23:       A switch at any given time is in one of the states.     

(a) 2

(b) 4

(c) 1

(d) 5

24:       Which operator is used for logical multiplication?     

(a) OR

(b) AND         

(c) NOT          

(d) All

25:       Which of the following operations are used by the Boolean Algebra

(a) Boolean Addition  

(b) Boolean Multiplication

(c) Complement         

(d) All 

26:       Logical addition refers to operation of

(a) OR gate   

(b) AND gate  

(c) NOT gate  

(d) Inverter gate

27:       A serial circuit is represented by

(a) – operator  

(b) . operator 

(c) + operator 

(d) All

28:       Boolean Algebra derives its name form the British mathematician  

(a) Napir         

(b) Charles Babbage  

(c) George Boole     

(d) Bill Gates

29:       A Boolean variable can only have one of the two values     

(a) 3,1

(b) 2,0

(c) 0,1

(d) 0,0

30:       An OR gate has at least inputs

(a) 2

(b) 3

(c) 4

(d) 1

31:       An AND gate has at least inputs

(a) 2

(b) 3

(c) 4

(d) 1

32:       A parallel circuit is represented by

(a) . operator  

(b) – operator  

(c) + operation

(d) All

33:       Two valued Boolean Algebra is a set that has elements and operations

In order to get high output in AND gate all the input must be

(a) High          

(b) Low            .

(c) Equal        

(d) None

35:       The output of the NOT gate is always the __ of the original value.  

(a) Same        

(b) Reverse   

(c) Both a & b 

(d) None

36:       Which of the following is a proposition?

(a) What is your Name?        

(b) Who is your father?

(c) Are you male?     

(d) None of these     


37:       In the representation of Boolean function, the A bar is assigned the value

(a) 0

(b) 1

(c) A

(d) Aa

38: The table that represents the output of a Boolean expression for all possible combination of input is called

(a) True Table

(b) Truth Table         

(c) Test Table 

(d) Boolean Table

39:       Which of the following logical operator is denoted by + sign

(a) AND          

(b) OR

(c) NOT

(d) None

40:       Boolean Algebra deals with

(a) Octal digits   

(b) Hexadecimal digits   

(c) Decimal digits   

(d) Binary digits

 41:    Truth table show all possible combinations of   

(a) Inputs   

(b) Outputs   

(c) Both a & b   

(d) None

42:    Boolean operators and Boolean variables combine to form Boolean   

(a) Outputs   

(b) Expression

(c) Both a & b   

(d) None

43: Who did overcome the disadvantages of Boolean algebra laws for simplification of expression?

(a) Pascal

(b) Charles Babbage

(c) Maurice Karnaugh

(d) George Boole

44: Which is Boolean constant

(a) 0   

(b) 1   

(c) 0 & 1

(d) – 1

45:       X, Y are called

(a) Boolean constant

(b) Variables

(c) Numbers

(d) None

46:        we can use it to change the order of evaluation of operations in a Boolean expression.

(a) Bars          

(b) Parentheses        

(c) Square brackets   

(d) Braces

47:       A truth table of a two variable expression will always have  

(a) 20  

(b) 2 1 

(c) 22  

(d) 23

48:       f ( x, y ) = x + y is a               

(a) Boolean variable   

(b) Boolean Expression         

(c) Boolean Function           

(d) Boolean Algebra   

49:       Standard product is known as

(a) Boolean function

(b) Maxterms

Standard sum is known as    

(c) Minterms 

(d) Literals

50:        Standard sum is known as

(a) Boolean function

(b) Maxterms

(c) Minterms  

(d) K-map