CBSE Class 12 Computer Science Object Oriented Concepts MCQs Set E

CBSE Class 12 Computer Science Object Oriented Concepts MCQs Set E 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: _______is generally referred to as 'is-a-kind-of relationship between two classes.

  • a) Composition
  • b) Aggregation
  • c) Inheritance
  • d) Abstraction

Answer: Inheritance


Question: ________refers to the capability of defining a new class of objects that inherits the characteristics of another existing class.

  • a) Inheritance
  • b) Composition
  • c) Aggregation
  • d) Messaging

Answer: Inheritance


Question: In object-oriented terminology_______class is called sub class or child class or derived class.

  • a) Latest
  • b) New
  • c) Old
  • d) Super

Answer: New


Question: The existing class is called______class or parent class or base class.

  • a) Sub
  • b) New
  • c) Super
  • d) Child

Answer: Super


Question: The data_______and methods of the super class are available to objects in the sub class without rewriting their declarations.

  • a) Attributes
  • b) Properties
  • c) Operators
  • d) Features

Answer: Attributes


Question: The above feature (mention in above question provides) reusability where existing method can be reused without______

  • a) Introduction
  • b) Availability
  • c) Definition
  • d) Redefining

Answer: Redefining


Question: Additionally new data and method members can be added to the______class as an extension.

  • a) Sub
  • b) New
  • c) Super
  • d) Child

Answer: Sub


Question: In a class diagram, inheritance is represented using an arrow pointing to______class.

  • a) Sub
  • b) New
  • c) Super
  • d) Child

Answer: Super


Question: _________is another name for inheritance or 'is a'relationship.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Generalization


Question: ________refers to a relationship between two classes where one class is a specialized version of another.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Generalization


Question: Common attributes and methods are defined in______class.

  • a) Sub
  • b) New
  • c) Super
  • d) Child

Answer: Super


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


Question: _________class is a specialized version with additional attributes and methods.

  • a) Sub
  • b) New
  • c) Super
  • d) Child

Answer: Sub


Question: A_______can be derived using more than parent classes.

  • a) Method
  • b) Program
  • c) Class
  • d) Variable

Answer: Class


Question: When a class is derived from two or more classes, it is known as multiple________

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Inheritance


Question: In_____class inherits from other classes in order to share, reuse or extend functionality.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Inheritance


Question: In_______classes do not inherit from other classes, but are 'composed of other classes.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Composition


Question: _________as methodology is playing a significant role in analysis, design and implementation of software system.

  • a) Object-oriented
  • b) Structure-oriented
  • c) Procedure-oriented
  • d) Aggregation-oriented

Answer: Object-oriented


Question: When a class contains objects of other class, the container class is called______class or whole class or aggregating class.

  • a) Sub
  • b) Owner
  • c) Super
  • d) Whole

Answer: Owner


Question: The class that is contained in owner class is known as_______class or part class or aggregated class.

  • a) Sub
  • b) Owner
  • c) Subject
  • d) Super

Answer: Subject


Question: ________represents non-exclusive relationship between two classes.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Aggregation


Question: represents exclusive relationship between two classes.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Composition


Question: When there is 'is-a' or 'a-kind-of relationship between two classes, there is_____relationship.

  • a) Aggregation
  • b) Composition
  • c) Inheritance
  • d) Generalization

Answer: Inheritance


Question: General features or common features of two classes are implemented in the______class.

  • a) Sub
  • b) Owner
  • c) Subject
  • d) Super

Answer: Super


Question: Special features of two classes are implemented in sub class.

  • a) Sub
  • b) Owner
  • c) Subject
  • d) Super

Answer: Sub


Question: In class diagram, composition is represented using which of the following symbols ?

  • a) Empty triangle symbol
  • b) Filled triangle symbol
  • c) Filled diamond symbol
  • d) Empty diamond symbol

Answer: Filled diamond symbol


Question: An inheritance model refers to which of the following relationships ?

  • a) Has-a-relationship'
  • b) A-part-of relationship
  • c) Is-a-part-of relationship
  • d) Is-a' relationship

Answer: Is-a' relationship


Question: Which of the following is enabled by data abstraction ?

  • a) Data protection
  • b) Data hiding
  • c) Hide implementation details
  • d) Hide relationship details

Answer: Hide implementation details


Question: Polymorphism cannot be achieved by which of the following ?

  • a) Operator overloading
  • b) Data hiding
  • c) Method overloading
  • d) None of these

Answer: Data hiding


Question: Which of the following model refers to an aggregation ?

  • a) A-part-of relationship
  • b) Is-like' relationship
  • c) Is-a' relationship
  • d) Has-a' relationship

Answer: A-part-of relationship


Question: _______is used to distinguish objects from each other.

  • a) Attributes
  • b) Behaviour
  • c) State
  • d) All of these

Answer: State

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