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
- 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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