(SEM V) THEORY EXAMINATION 2020-21 OBJECT- ORIENTED SYSTEM DESIGN

SECTION A (Any 2 Questions Explained Briefly)
 

What do you understand by object identity?
Object identity means that every object has a unique existence, even if two objects have the same attributes and values. In object-oriented systems, each object is distinguished by its identity rather than its data. For example, two student objects with the same name and roll number are still treated as separate objects in memory.
 

Differentiate between procedural programming and OOP.
Procedural programming focuses on functions and step-by-step procedures, whereas object-oriented programming focuses on objects that combine data and behavior. OOP improves code reusability, security, and maintainability through concepts like encapsulation, inheritance, and polymorphism.
 

SECTION B (Any 2 Questions Explained)
 

What is data abstraction? How is it different from encapsulation?
Data abstraction is the process of hiding internal implementation details and showing only essential features of an object. Encapsulation, on the other hand, is the technique of binding data and methods together into a single unit called a class. While abstraction focuses on what an object does, encapsulation focuses on how data is protected within the object.
 

Explain link and association with example.
A link represents a physical or logical connection between two object instances at runtime, whereas an association defines a relationship between classes at the design level. For example, a link may exist between a specific student and a specific course, while association represents the general relationship between Student and Course classes.
 

SECTION C (Any 2 Questions Explained)
 

What is early binding and late binding in polymorphism?
Early binding occurs when the method call is resolved at compile time, usually with function overloading. Late binding occurs when the method call is resolved at runtime, mainly using virtual functions. Late binding supports runtime polymorphism and makes systems more flexible.
 

Why is Object-Oriented Programming important in real life and software industries?
Object-oriented programming is important because it models real-world entities using objects, making software easier to understand and maintain. It improves code reusability, scalability, and reliability. Due to these advantages, OOP is widely used in software industries for developing large and complex applications.
 

Most Questions in This PDF Are Related To
 

Most questions in the Object Oriented System Design (KCS-054) paper are related to object-oriented concepts such as objects, classes, abstraction, encapsulation, inheritance, polymorphism, links and associations, UML diagrams (use case, state chart, collaboration), object-oriented analysis and design (OOA/OOD), operator overloading, exception handling, and C++ programming concepts. The paper mainly focuses on design principles and modeling techniques used in object-oriented software development.