Chapter 2: Basic Concepts of OOP Classes & Objects | class 12th | mcqs of computer science

Object Oriented Concepts MCQ Questions Class 12 Computer Science with Answers

Question: In Object-oriented methodology, the focus is on which of the following entities ?

• a) Data
• b) Functions
• c) Objects
• d) All of the above

Answer: Objects

Question: Which of the following best suits to Java ?

• a) A procedural programming language
• b) An object oriented programming language
• c) A Query language
• d) All of the above

Answer: An object oriented programming language

Question: Which of the following is used to distinguish objects from each other?

• a) Attributes
• b) State
• c) Behavior
• d) All of the above

Answer: State

Question: Which of the following is used to define common features of similar objects?

• a) Class
• b) Object
• c) Methods
• d) All of the above

Answer: Class

Question: Which of the following is not a visibility symbol ?

• a) ~
• b) *
• c) #
• d) –

Answer: *

Question: Which of the following is provided using encapsulation ?

• a) Data protection
• b) Data sharing
• c) Separation of data and methods
• d) All of these

Answer: Data protection

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

• a) Data protection
• b) Data hiding
• c) To hide implementation details of method manipulating the data
• d) All of these

Answer: To hide implementation details of method manipulating the data

Question: With which of the following options polymorphism cannot be achieved ?

• a) Method overloading
• b) Operator overloading
• c) Data hiding
• d) All of these

Answer: Data hiding

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

• a) ‘is-a’ relationship
• b) ‘is-like’ relationship
• c) ‘a-part-of relationship
• d) All of these

Answer: ‘is-a’ relationship

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

• a) ‘is-a’ relationship
• b) ‘has-a’ relationship
• c) ‘a-part-of relationship
• d) All of these

Answer: ‘is-a’ relationship

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

• a) Empty diamond symbol
• b) Filled diamond symbol
• c) Empty triangle symbol
• d) All of these

Answer: Filled diamond symbol

Question: Object-oriented programming concepts started originating in the_______

• a) 1950s
• b) 1960s
• c) 1970s
• d) 1980s

Answer: 1960s

Question: Since mid______object-oriented programming had become the main programming paradigm used in the creation of new software.

• a) 1950s
• b) 1960s
• c) 1970s
• d) 1980s

Answer: 1980s

Question: Some of the popular programming languages that support______programming are C++, Java, C#, VB.net, ASP.net and PHP.

• a) Object-oriented
• b) Structural
• c) Modular
• d) Procedural

Answer: Object-oriented

Question: The way of programming can be divided into______categories.

• a) Four
• b) Three
• c) Two
• d) One

Answer: Two

Question: Java is a_____programming language.

• a) Object-oriented
• b) Structural
• c) Modular
• d) Procedural

Answer: Object-oriented

Question: The categories are______and object-oriented.

• a) Objective
• b) Structure/procedural
• c) Modular
• d) Functional

Answer: Structure/procedural

Question: In_______programming, the focus is on writing functions or procedures which operate on data.

• a) Procedural
• b) Modular
• c) Functional
• d) None of these

Answer: Procedural

Question: In object-oriented_____the focus is on objects which contain data and functionality together.

• a) Pattern
• b) Prototype
• c) Paradigm
• d) Example

Answer: Paradigm

Question: The power of object-oriented programming language enables the programmer to create modular, reusable and_____code.

• a) Complete
• b) Accomplished
• c) Perfect
• d) Executable

Answer: Executable

Question: Flexibility is gained by being able to change or replace______without disturbing other parts of code.

• a) Modules
• b) Parts
• c) Functions
• d) Methods

Answer: Modules

Question: Object-oriented programming uses_____as its fundamental building block.

• a) Method
• b) Class
• c) Object
• d) Procedure

Answer: Object

Question: A computer language is object-oriented if they support four specific object properties called

• a) Abstraction
• b) Encapsulation
• c) Polymorphism and Inheritance
• d) All of these

Answer: All of these

Question: C# is a______programming language.

• a) Object-oriented
• b) Structural
• c) Modular
• d) Procedural

Answer: Object-oriented

Question: In the real world______are the entities of which the world is comprised.

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

Answer: Objects

Question: Some objects can be______things like person, car or a cup of coffee.

• a) Abstract
• b) Concrete
• c) Real
• d) Solid

Answer: Concrete

Question: Some objects may be______that do not represent things which can be touched or seen.

• a) Abstract
• b) Concrete
• c) Real
• d) Solid

Answer: Abstract

Question: All objects have unique______and are distinguishable from each other.

• a) Personality
• b) Objects
• c) Procedures
• d) Identity

Answer: Identity

Question: In object-oriented terminology characteristics are known as properties or_______

• a) Features
• b) Attributes
• c) Values
• d) States

Answer: Attributes

Question: To uniquely distinguish one person from other,the______of its characteristics is used.

• a) Worth
• b) Cost
• c) Value
• d) Property

Answer: Value

Question: When two people have same name, they can be distinguished using other attributes like______

• a) Color
• b) Name
• c) Birth-date
• d) Behavior

Answer: Birth-date

Question: To identifythe value of the attributes is used.

• a) Personality
• b) Objects
• c) Procedures
• d) Identity

Answer: Objects

Question: There is always a behavior associated with

• a) Personality
• b) Objects
• c) Procedures
• d) Identity

Answer: Objects

Question: The behavior of objects is also known as

• a) Method
• b) Technique
• c) Process
• d) Procedure

Answer: Method

Question: The_______of the object can change due to its behavior.

• a) State
• b) Method
• c) Status
• d) Class

Answer: State

Question: Object can be described in terms of

• a) What it is called (identity)
• b) What it is (its state)
• c) What it does (behavior)
• d) All of these

Answer: All of these

Question: In object-oriented programming, attributes that describe the object are also referred to as_____fields.

• a) Information
• b) Method
• c) Data
• d) Name

Answer: Data

Question: The data attributes and behavioral methods associated with an object are collectively referred to as its____or features.

• a) Component
• b) Associate
• c) Part
• d) Member

Answer: Member

Question: _______system uses the concept of class that enables to express the set of objects that are abstractly equivalent, differing only in the values of their attributes.

• a) Object-oriented
• b) Value-oriented
• c) Data-oriented
• d) All of these

Answer: Object-oriented

Question: ______can be considered as a blueprint for various objects.

• a) Method
• b) Class
• c) Object
• d) Member

Answer: Class

Question: A class is a_______for multiple objects with similar features.

• a) Image
• b) Representation
• c) Template
• d) Guide

Answer: Template

Question: A class describes a group of objects with similar______and common behaviour.

• a) Features
• b) Attributes
• c) Values
• d) States

Answer: Attributes

Question: _______in the same class share a common semantic purpose.

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

Answer: Objects

Question: _______is a general concept used to embody all the common features of a particular set of objects.

• a) Method
• b) Class
• c) Object
• d) Member

Answer: Class

Question: The class______presents a collection of classes, constraints and relationship among classes.

• a) Diagram
• b) Map
• c) Drawing
• d) Figure

Answer: Diagram

Question: _______can be used to create models of object-oriented software to help with design of an application.

• a) ULM
• b) UML
• c) LUM
• d) MUL

Answer: UML

Question: _______is a visual modeling language defined and maintained by the Object Management Group.

• a) ULM
• b) UML
• c) LUM
• d) MUL

Answer: UML

Question: _______specifies several diagrams for representing different aspects of a software application.

• a) ULM
• b) UML
• c) LUM
• d) MUL

Answer: UML

Question: The purpose of the class________is to model the static view of an application.

• a) Diagram
• b) Map
• c) Drawing
• d) Figure

Answer: Diagram

Question: The class’s diagrams are only diagrams which can be directly mapped with object-oriented.

• a) Methods
• b) Procedures
• c) Languages
• d) Attributes

Answer: Languages

Question: In class diagram, a class is represented with an icon using a rectangle split into______sections to present name, attributes and behaviour.

• a) One
• b) Two
• c) Three
• d) Four

Answer: Three

Question: In the class diagram, the name is in the______section.

• a) Top
• b) Middle
• c) Centre
• d) Bottom

Answer: Top

Question: In the class diagram, the attributes or methods are in the_____section.

• a) Top
• b) Middle
• c) Centre
• d) Bottom

Answer: Middle

Question: In the class diagram, the behaviour or operations are in the_____section.

• a) Top
• b) Middle
• c) Centre
• d) Bottom

Answer: Bottom

Question: Full form of UML is______

• a) Unified Modelling Language
• b) United Modelling Language
• c) United Model of Languages
• d) None of these

Answer: Unified Modelling Language

Question: Full form of OMG is______

• a) Oriented Management Group
• b) Oriented Managing Group
• c) Object Management Group
• d) Object Management Grouping

Answer: Object Management Group

Question: In UML notation, an attribute is declared using the following syntax :

• a) [][:[=]]
• b) [][:]]
• c) [][:] ]
• d)[:[=]]

Answer: [] [:]]

Question: In an attribute declaration, the______brackets are optional.

• a) Round
• b) Chain
• c) Angle
• d) Square

Answer: Square

Question: In an attribute declaration, the values should be specified in the_____brackets.

• a) Round
• b) Chain
• c) Angle
• d) Square

Answer: Angle

Question: In an attribute declaration, the______can be private, protected, public or package.

• a) Visibility
• b) Invisible
• c) Evident
• d) Obvious

Answer: Visibility

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

 

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

Question: A user defined______with necessary input data parameters also provides data abstraction.

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

Answer: Function

Question: The signature of the function means the name of the function, number and type of parameters and the return type of______

• a) Parameters
• b) Methods
• c) Parts
• d) Variables

Answer: Parameters

Question: Data_____provides the skeleton or templates for the programmers use. The system hides certain details of how data is stored, created and maintained.

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

Answer: Abstraction

Question: All that is______to the rest of the world is the abstract behaviour of the data type.

• a) Invisible
• b) Hidden
• c) Seen
• d) Visible

Answer: Visible

Question: ______or structures (struct) in C/C++, classes / Java are examples for data abstraction.

• a) ADVT
• b) TDA
• c) DAT
• d) ADT

Answer: ADT

Question: Full form of ADT is________

• a) Abstraction Date Type
• b) Abstract Date Type
• c) Abstract Data Type
• d) Abstract Data Template

Answer: Abstract Data Type

Question: In___it is simply defined a data type and a set of operations on it. The implementation of operations is not seen.

• a) ADVT
• b) TDA
• c) DAT
• d) ADT

Answer: ADT

Question: Encapsulation_____data by making them inaccessible from outside.

• a) Hides
• b) Protects
• c) Displays
• d) Harms

Answer: Protects

Question: _______enables to represent data in which the implementation details are hidden.

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

Answer: Abstraction

Question: In object-oriented terminology, a call to a method is referred to as a______

• a) Message
• b) Function
• c) Call
• d) Letter

Answer: Message

Question: ________represents ‘has-a’ or ‘a-part-of relationship between classes.

• a) Aggregation
• b) Polymorphism
• c) Work
• d) Messaging

Answer: Aggregation

Question: ______represents non-exclusive relationship between two classes.

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

Answer: Aggregation

Question: In_____the class that forms part of the owner class can exist independently.

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

Answer: Aggregation

Question: The life of an______of the part class is not determined by the owner class.

• a) Variable
• b) Parameter
• c) Operator
• d) Object

Answer: Object

Question: Although the motherboard is part of the computer, it can exist as a separate item independent of the_______

• a) Workstation
• b) System
• c) Computer
• d) Processor

Answer: Computer

Question: Basic aggregation is represented using an empty_______symbol next to the whole class.

• a) Square
• b) Diamond
• c) Triangle
• d) Circle

Answer: Diamond

Question: ________represents exclusive relationship between two classes.

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

Answer: Composition

Question: ______is a strong type of aggregation where the lifetime of the part class depends on the existence of the owner class.

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

Answer: Composition

Question: If an object of aggregating class is deleted, its part_______object also gets deleted.

• a) Function
• b) Message
• c) Class
• d) Variable

Answer: Class

Question: When an object of class Person is deleted, the object of class Name is also______

• a) Removed
• b) Deleted
• c) Detached
• d) Attached

Answer: Deleted

 

Question: _______property suits best with Java.

• a) A Structured Language
• b) An Object-oriented Language
• c) A Procedural Language
• d) An Interpreting Language

Answer: An Object-oriented Language

Question: is provided while using encapsulation.

• a) Data Protection
• b) Data Hiding
• c) Data Sharing
• d) Data and Methods Separation

Answer: Data Protection

Question: The focus is on_____entity in an object-oriented methodology.

• a) Functions
• b) Data
• c) Classes
• d) Objects

Answer: Objects

Question: In class diagram, basic aggregation 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: Empty diamond symbol

Question: The data type for NAME variable should be______

• a) String
• b) Char
• c) Date
• d) Int

Answer: String

Question: The data type for BIRTHDATE variable should be____

• a) String
• b) Char
• c) Date
• d) Int

Answer: Date

Question: The data type for GENDER variable should be

• a) String
• b) Char
• c) Double
• d) Int

Answer: Char

Question: The data type for NO_OF_STUDENTS variable should be_______

• a) String
• b) Char
• c) Double
• d) Int

Answer: Int

Question: _______is used to define common features of similar objects.

• a) Class
• b) Procedure
• c) Object
• d) Method

Answer: Method

Question: The output of the function sqrt(25) is_______

• a) 5
• b) 10
• c) 15
• d) 20

Answer: 5

Question: A user defined______with necessary input data parameters also provides data abstraction.

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

Answer: Function

Question: The signature of the function means the name of the function, number and type of parameters and the return type of______

• a) Parameters
• b) Methods
• c) Parts
• d) Variables

Answer: Parameters

Question: Data_____provides the skeleton or templates for the programmers use. The system hides certain details of how data is stored, created and maintained.

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

Answer: Abstraction

Question: All that is______to the rest of the world is the abstract behaviour of the data type.

• a) Invisible
• b) Hidden
• c) Seen
• d) Visible

Answer: Visible

Question: ______or structures (struct) in C/C++, classes / Java are examples for data abstraction.

• a) ADVT
• b) TDA
• c) DAT
• d) ADT

Answer: ADT

Question: Full form of ADT is________

• a) Abstraction Date Type
• b) Abstract Date Type
• c) Abstract Data Type
• d) Abstract Data Template

Answer: Abstract Data Type

Question: In___it is simply defined a data type and a set of operations on it. The implementation of operations is not seen.

• a) ADVT
• b) TDA
• c) DAT
• d) ADT

Answer: ADT

Question: Encapsulation_____data by making them inaccessible from outside.

• a) Hides
• b) Protects
• c) Displays
• d) Harms

Answer: Protects

Question: _______enables to represent data in which the implementation details are hidden.

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

Answer: Abstraction

Question: In object-oriented terminology, a call to a method is referred to as a______

• a) Message
• b) Function
• c) Call
• d) Letter

Answer: Message

Question: ________represents ‘has-a’ or ‘a-part-of relationship between classes.

• a) Aggregation
• b) Polymorphism
• c) Work
• d) Messaging

Answer: Aggregation

Question: ______represents non-exclusive relationship between two classes.

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

Answer: Aggregation

Question: In_____the class that forms part of the owner class can exist independently.

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

Answer: Aggregation

Question: The life of an______of the part class is not determined by the owner class.

• a) Variable
• b) Parameter
• c) Operator
• d) Object

Answer: Object

Question: Although the motherboard is part of the computer, it can exist as a separate item independent of the_______

• a) Workstation
• b) System
• c) Computer
• d) Processor

Answer: Computer

Question: Basic aggregation is represented using an empty_______symbol next to the whole class.

• a) Square
• b) Diamond
• c) Triangle
• d) Circle

Answer: Diamond

Question: ________represents exclusive relationship between two classes.

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

Answer: Composition

Question: ______is a strong type of aggregation where the lifetime of the part class depends on the existence of the owner class.

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

Answer: Composition

Question: If an object of aggregating class is deleted, its part_______object also gets deleted.

• a) Function
• b) Message
• c) Class
• d) Variable

Answer: Class

Question: When an object of class Person is deleted, the object of class Name is also______

• a) Removed
• b) Deleted
• c) Detached
• d) Attached

Answer: Deleted

 

Question: _______property suits best with Java.

• a) A Structured Language
• b) An Object-oriented Language
• c) A Procedural Language
• d) An Interpreting Language

Answer: An Object-oriented Language

Question: is provided while using encapsulation.

• a) Data Protection
• b) Data Hiding
• c) Data Sharing
• d) Data and Methods Separation

Answer: Data Protection

Question: The focus is on_____entity in an object-oriented methodology.

• a) Functions
• b) Data
• c) Classes
• d) Objects

Answer: Objects

Question: In class diagram, basic aggregation 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: Empty diamond symbol

Question: The data type for NAME variable should be______

• a) String
• b) Char
• c) Date
• d) Int

Answer: String

Question: The data type for BIRTHDATE variable should be____

• a) String
• b) Char
• c) Date
• d) Int

Answer: Date

Question: The data type for GENDER variable should be

• a) String
• b) Char
• c) Double
• d) Int

Answer: Char

Question: The data type for NO_OF_STUDENTS variable should be_______

• a) String
• b) Char
• c) Double
• d) Int

Answer: Int

Question: _______is used to define common features of similar objects.

• a) Class
• b) Procedure
• c) Object
• d) Method

Answer: Method

Question: The output of the function sqrt(25) is_______

• a) 5
• b) 10
• c) 15
• d) 20

Answer: 5

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

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