CBSE Class 12 Computer Science Object Oriented Concepts MCQs Set C

CBSE Class 12 Computer Science Object Oriented Concepts MCQs Set C with answers available in Pdf for free download. The MCQ Questions for Class 12 Computer Science with answers have been prepared as per the latest 2021 syllabus, NCERT books and examination pattern suggested in Standard 12 by CBSE, NCERT and KVS. Multiple Choice Questions for important part of exams for Grade 12 Computer Science and if practiced properly can help you to get higher marks. Refer to more Chapter wise MCQs for NCERT Class 12 Computer Science and also download more latest study material for all subjects

Question: In an attribute declaration, the private visibility is represented by_____symbol.

  • a) -
  • b) #
  • c) +
  • d) ~

Answer: -


Question: In an attribute declaration, the protected visibility is represented by______symbol.

  • a) -
  • b) #
  • c) +
  • d) ~

Answer: #


Question: In an attribute declaration, the public visibility is represented by_____symbol.

  • a) -
  • b) #
  • c) +
  • d) ~

Answer: +


Question: In an attribute declaration, the package visibility is represented by_____symbol.

  • a) -
  • b) #
  • c) +
  • d) ~

Answer: ~


Question: Attribute generally refers to a______

  • a) Variable
  • b) Property
  • c) Value
  • d) Class

Answer: Variable


Question: _______type and initial value identify the type of data stored and its value at the start of the program.

  • a) Data
  • b) Date
  • c) Value
  • d) Class

Answer: Data


Question: ______is an example of declaring attribute.

  • a) Name:- string;
  • b) Name : string
  • c) Name ++string
  • d) Name = string

Answer: Name : string


Question: In UML notation, an operation is declared using_____syntax:

  • a) [](parameter list separated by comma):
  • b) [](parameter list separated by comma):
  • c) [](parameter list separated by comma):
  • d) None of these.

Answer: [](parameter list separated by comma):


Question: ________diagrams are independent of the programming language used for coding an application.

  • a) ULM
  • b) UML
  • c) LUM
  • d) MUL

Answer: UML


Question: _______are presented using their state during execution of an application.

  • a) Methods
  • b) Procedures
  • c) Classes
  • d) Objects

Answer: Objects


Question: Objects are_______

  • a) Dynamic
  • b) Vibrant
  • c) Colorful
  • d) All of these

Answer: Dynamic


More Questions..............................


Question: An object is also called an______

  • a) Image
  • b) Illustration
  • c) Instance
  • d) Occurrence

Answer: Instance


Question: For any computer program, two or more elements are data and________

  • a) Method
  • b) Function
  • c) Information
  • d) Procedure

Answer: Function


Question: Structured/Procedural programming views the two core elements as______separate entities.

  • a) One
  • b) Two
  • c) Three
  • d) None of these

Answer: Two


Question: ________programming views the two coreentities as single entity.

  • a) Object-oriented
  • b) Structured
  • c) Procedural
  • d) Instance

Answer: Object-oriented


Question: In______programming, data can be altered by any component of the program.

  • a) Object-oriented
  • b) Structured
  • c) Procedural
  • d) Instance

Answer: Procedural


Question: In object-oriented programming, the problem of modification can be solved using______

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Encapsulation


Question: Data and the methods that______data are guarded against modification or misuse by other components of the program.

  • a) Change
  • b) Modify
  • c) Manipulate
  • d) Imitate

Answer: Manipulate


Question: The mechanism of providing protection to data and methods of a program is called______

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Encapsulation


Question: ______is possible by wrapping data and methods into a single unit known as class and declaring them as private.

  • a) Encapsulation
  • b) Abstraction
  • c) Messaging
  • d) Polymorphism

Answer: Encapsulation


Question: ________members of the class are not available directly to outside world.

  • a) Private
  • b) Public
  • c) Void
  • d) Static

Answer: Private


Question: Data can be made available via public______to the outside world.

  • a) Messages
  • b) Methods
  • c) Function
  • d) Declarations

Answer: Methods


Question: Encapsulation provides______hiding capability.

  • a) Information
  • b) Data
  • c) Code
  • d) Class

Answer: Data


Question: _______keeps the data safe from unintended actions and inadvertent access by outside objects.

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Encapsulation


Question: ________programming discourages direct access to common data by other programs.

  • a) Object-oriented
  • b) Structured
  • c) Procedural
  • d) Instance

Answer: Object-oriented


Question: Only the object that______the data can change its content.

  • a) Holds
  • b) Possesses
  • c) Owns
  • d) Creates

Answer: Owns


Question: Other objects can view or change this data by sending message to the "owner".

  • a) Vendor
  • b) Businessman
  • c) Owner
  • d) Viewer

Answer: Owner


Question: Data______is a process of representing the essential features of the objects without including implementation detail.

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Abstraction


Question: _______is a concept that hides the complexity; it says what it does, but not how it is done.

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Abstraction


Question: Data______thus is a technique that relies on the separation of interface and implementation.

  • a) Polymorphism
  • b) Abstraction
  • c) Messaging
  • d) Encapsulation

Answer: Abstraction

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