Class 12th Computer Science MCQ | Question Answer

Class 12th Computer Science MCQ

Class 12th Computer Science Notes For Board Exam | Computer Science Notes For Board Exam | Class 12 Computer Science Objective Answer | Computer Science class 12 Sumita Arora Solutions | 12th computer science one mark questions and answers | Chapter wise.

These questions and answers follow the NCERT pattern, you can prepare for the board examination and competition examination with the help of these Computer Science MCQ questions & Answers.

Computer Science (C++) MCQs

1 . In C++ every statement end with

• colon(:)
• Comma (,)
• dot (.)
• Semicolon (;)

2. Base class is

• normal class
• derived class
• child class
• all of these

3. Which of the following is not a feature of C++.

• Operator overloading
• Inheritance
• Namespace
• Reflection

4. Which of the following is not a member of the class?

• Static function
• Friend function
• Virtual function
• Const function

5. Which of the following is the correct class of the object cout?

• iostream
• istream
• ostream
• ifstream

6. Which of the following is not a type of inheritance?

• Multiple
• Multilevel
• Distributive
• Hierarchical

7. In protected inheritance, a public data member of the base class will be treated in a derived class as.

• public
• private none of the above
• protected
• none of the above

8. main is a/an

• keyword
• object
• function
• none of the above

9. A set of arithmetic operators are.

• + , – , * , / , %
• < , > , >= , <=
• &&, ||, !
• none of the above

10. A set of logical operators are.

• + , – , * , / , %
• < , > , >= , <=
• &&, ||, !
• none of the above

11. Which of the following concepts means determining at runtime what method to invoke.

• Data hiding
• Dynamic loading
• Dynamic typing
• Dynamic binding

12. is a way of combining data with functions into an object.

• Object
• Encapsulation
• Inheritance
• Constructor

13. eof is an acronym of

• the ending of line
• ending of files
• end of file
• None of the above

14. C++ language has been developed by

• Dennis Ritchie
• Ken Thompson
• Martin Richard
• Bjarne Stroustrup

15. Which operator has the lowest precedence?

• Size
• Urinary
• Assignment
• Comma

16. The ternary operator operates on how many operands?

• 1
• 2
• 3
• 4

17. An instance of a class is called…….

• private
• object
• public
• None of the above

18. Which of the following library function below by default aborts the Program.

• end ( )
• terminate ( )
• abort ( )
• exit ( )

19. The individual elements in an array are called

• encrypted
• Decrypted
• Subscripted
• Identifier

20. The default access level assigned to members of the class is.

• Private
• Public
• Protected
• None of these

21. while loop is a …. controlled loop.

• count
• exit
• entry
• none of the above

22. The do-while loop is a …….. Controlled loop.

• count
• exit
• entry
• none of the above

23. Which of the following is an abstract data type?

• int
• string
• double
• class

24. For loop is a ….. Controlled loop.

• count
• exit
• entry
• none of the above

25. Which of the following approach is adopted by C++

• Bottom-up
• Top-down
• Right-left
• Left-right

26. Which of the following is the symbol for AND
operator?

• ll
• &&
• &
• None of these

27. cout is a/an ………..

• operator
• object
• function
• macro

28. Which operator has the lowest precedence?

• size
• Unary
• Assignment
• Comma

29, In object-oriented programming, by wrapping up Characteristic and behavior into one unit, we achieve.

• Data Abstraction
• Data Encapsulation
• Data hiding
• All of these

30. The use of the break statement in a switch statement is.

• optional
• compulsory
• to check an error
• none of these

Computer Science (Data Structure) MCQs

1. Which of the following sorting algorithms divide-and-conquer type?

• Bubble sort
• Insertion sort
• Quicksort
• All of the above

2. Which of the following data structure is a linear data structure?

• Trees
• Graphs
• Arrays
• None of the above

3. Which data structure allows deleting data elements from front and inserting at the rear?

• Stacks
• Queues
• Deques
• Binary search tree

4. The operation of processing each element in the list is known as

• Sorting
• Merging
• Inserting
• Traversal

5. Which of the following is not the type of queue?

• Ordinary queue
• Single-ended queue
• Circular queue
• Priority queue

6. How many nodes does a binomial tree of the order have?

• 0
• 1
• 2
• 3

7. Quicksort is faster than

• Selection sort
• Insertion sort
• Bubble sort
• All of these

8. Which type of linked does not store NULL in the next field?

• Singly-linked list
• Doubly linked list
• Circular linked list
• All of these

9. Disk piled up one above the other represent a

• Stacks
• Queues
• Linked list
• Array

10. Major operation performed on Data Structures are

• Sorting
• Searching
• Inserting
• All the above

11. Arranging elements of an array in a specific order is called

• Sorting
• searching
• Inserting
• Traversing

12. Processing all the elements of an array is called.

• Insertion
• Sorting
• Deletion
• Traversing

13. Which of the following data structures are indexed structures?

• Linear arrays
• Linked list
• Queue
• Stack

14. LIFO means

• Last In First Out
• Last In Fast Overflow
• Last In First Overflow
• None of the above

15. FIFO means

• First In First Out
• Fast In Fast Out
• Fast In First Out
• First In Fast Out

16. Which of the following data structures cant store the non-homogeneous data elements?

• Arrays
• Pointers
• Records
• None

17. A stack is a …….. data Structure.

• Dynamic
• Linear ‘
• Non-dynamic
• None of the above

18. Queue is work as.

• FIFO
• LIFO
• Both a and b
• None of the above

19. Elements can be added or removed at both ends is called

• Queue
• Deque
• Circular Queue
• All the above

20. Stack is work as.

• FIFO
• LIFO
• Both a and b
• None of the above

21. Deleting from an empty list is known as.

• Overflow
• Underflow
• Both (a) and (b)
• None of the above

22. A line in a grocery store represents a

• Stacks
• Linked list
• Queues
• Array

23. In a queue, insertion is done at.

• Rear
• Front
• Both (a) and (b)
• none of the above

24. Which data structure allows deleting data elements from front and inserting at the rear?

• Stacks
• Deques
• Queues
• Binary search tree

25. Which of the following data structure is non-linear type?

• Strings
• Stacks
• Lists
• None of above

26. Beginning address of an array is called

• Base Address
• Top Address
• Both (a) & (b)
• None of the above

27. Transform prefix operation /- + A*BCD * EF to an infix form

• (A + B * C – D) /E * F
• (A+ B – C / D) * E *F
• (A + B – C * D) /E * F
• None of the above

28. Transform infix operation (A+ B * C- D) /E * F to an postfix form

• A B C+ * D – EF */
• A B C* + D – EF * /
• A B C * + D – EF / *
• None of the above

Computer Science (Database) MCQs

1. Key is an ….. in the database system.

• Attribute
• Condition
• Row
• Variables

2. Ordered by clause is used to ….. the query result.

• sort
• index
• order
• none of the above

3. A…….. is used to identify a particular record.

• Index
• Tuple
• Key
• All the above

4. A row in a relation is called

• Data
• Domain
• Tuple
• None of the above

5. The duplication of data is known as.

• Data redundancy
• Attribute
• domain
• None of these

6. Set of possible values that an attribute can have……

• Tuple
• Value
• Domain
• None of the above

7. A…….. is an integrated collection of related files.

• Database
• Software
• Record
• All the above

8. The number of tuples in a relation is called.

• Degree
• Attribute
• Cardinality
• None of the above

9. The following are components of a database except …….

• user data
• reports
• metadata
• indexes

10. Which of the following is NOT a type of SQL constraint?

• PRIMARY KEY
• FOREIGN KEY
• ALTERNATE KEY
• UNIQUE

11. Which of the following is a database element?

• Data
• Constraints and Schema
• Relationships
• All the above

12. Which of the following is not a Data Manipulation Language Statement?

• COMMIT
• DELETE
• UPDATE
• INSERT

13. SQL means.

• Simple Query Language
• Structured Quarter Language
• Structured Query Language
• None of the above

14. DDL means.

• Data Definition Language
• Data Dictionary Language
• Data Description Language
• None of the above

15. DML means.

• Data Manipulation Language
• Data Maintained Language
• Data Multiple Language
• None of the above

16. RDBMS means

• Relational Database Management System
• Restricted Database Management System
• Resolution Database Management System
• All the above

17. The number of tuples in a relation is called.

• Degree
• Attribute
• Cardinality
• None of the above

18. A transparent DBMS?

• Can not hide sensitive information from users
• Keep its logical structure hidden from users
• keeps its physical structure hidden from users
• Both (b) and (c)

Computer Science (BOOLEAN ALGEBRA) MCQs

1. How long is an IPv6 address?

• 32 bits
• 64 bits
• 128 bits
• 128 bits

2. Virus, Worms and Trojan horse are examples of

• Adware
• Malware
• Spyware
• All of these

3. A program that enables users to post messages or articles for other people to read.

• Gopher
• FTP
• Newsgroup
• Electronic Newspaper

4. Web Browser is/are –

• Google Chrome
• Internet Explorer
• Firefox
• All the above

5. MAN refers to

• Mega Area Network
• Medium Area Network
• Mini Area Network
• Metropolitan Area Network

6. Co-axial cables are made of

• Board
• Base
• Both a) & b)
• None of the above

7. SMTP means

• Simple Mail Trapping Protocol
• Simple Mail Transport Protocol
• Simple Mail Transpose Protocol
• Simple Mail Transfer Protocol

8. GIAS means

• Gateway Internet Access Service
• Gateway Intranet Access Service
• Getaway Internet Access Service
• None of the above

9. Home page is in the form of

• Text
• Hyperlink
• Hypertext
• All the above

10. A tool that makes the internet easy to work with.

• Internet
• Cable
• Gopher
• None of the above

11. …….. was the first network based on TCP/IP.

• NFS
• ARPANET
• NFSNET
• ARCNET

12. An interconnected collection of autonomous computers.

• Bridge
• Router
• Network
• None of these

13. ……… is a network of networks.

• Intranet
• Webpage
• Internet
• Browser

14. The data transmission rate is expected in……

• Base
• Baud
• Amplitude
• None of the above

15. Which of the following layer is not in the OSI model?

• Physical Layer
• Network Layer
• Internet Layer
• Transport Layer

16. An Internet utility used for remote login is.

• Telnet
• Cookies
• Firewall
• Crackers

17. What protocol does PPP use to identify the Network layer protocol?

• NCP
• ISDN
• LCP
• HDLC

18. Which protocol does DHCP use at the Transport layer?

• IP
• TCP
• UDP
• ARP

19. Which of the following is the correct format of Email address?

• www.nameofebsite.com
• name.website.com
• name@website@info
• name@website.info

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