CY-604-B Ooad - Jun 2026 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aAbstraction is considered the foundation of object oriented software development. Explain the concept with a suitable real life example.
   How to answer

   • Define abstraction as hiding irrelevant details and exposing essential features
   • Explain role as foundation of OOP/OOD with classes, interfaces
   • Give real-life example e.g. car driving, ATM, switch board
   • Relate example to software abstraction
2. 7 Marks
   bDifferentiate between Association and Aggregation using suitable UML notation.
   How to answer

   • Define association with UML line notation and example
   • Define aggregation with hollow diamond notation and example
   • Compare ownership, lifetime, multiplicity
   • Draw neat UML snippets for both
3. 7 Marks
   aExplain the phases of Object Oriented Software Development Life Cycle.
   How to answer

   • List OOSDLC phases: analysis, design, implementation, testing, maintenance
   • Explain objective and output of each phase
   • Emphasize iterative and reuse aspects of OO life cycle
   • Give diagram of life cycle flow
4. 7 Marks
   bDraw the Object Model for a Library Management System and explain the identified classes.
   How to answer

   • Identify classes: Book, Member, Librarian, Loan, Catalog
   • Show attributes, operations and associations/aggregation
   • Draw object/class model with UML notation
   • Explain each identified class role
5. 7 Marks
   aDraw the State Diagram for an ATM system and explain the state transitions involved during a cash withdrawal operation.
   How to answer

   • List ATM states: Idle, Card Inserted, PIN Entry, Transaction Selection, Dispensing, Eject
   • Draw state diagram with events/guards
   • Explain transitions during cash withdrawal flow
   • Include invalid PIN/insufficient balance branches
6. 7 Marks
   bExplain the purpose of Data Flow Diagram in Object Modeling Technique.
   How to answer

   • Define DFD in context of OMT functional model
   • Explain processes, data stores, flows, external entities
   • Explain purpose: capture functionality and data transformation
   • Relate to object modeling technique
7. 7 Marks
   aWhat is Design Optimization? Discuss the techniques used to improve software design before implementation.
   How to answer

   • Define design optimization for performance, memory, maintainability
   • Discuss techniques: class restructuring, algorithm selection, inheritance tuning
   • Discuss avoiding premature optimization vs refactoring
   • Give example before implementation
8. 7 Marks
   bExplain Object Representation. What factors should be considered while representing objects during software design?
   How to answer

   • Define object representation in design/implementation
   • Explain memory layout, attributes, method dispatch
   • Discuss factors: encapsulation, inheritance, persistence, performance
   • Give example representation
9. 7 Marks
   aDraw a Use Case Diagram for an Online Shopping System and explain the interaction between actors and use cases.
   How to answer

   • Identify actors: Customer, Admin, Payment Gateway
   • Identify use cases: Browse, Cart, Checkout, Payment, Order tracking
   • Draw use case diagram with include/extend
   • Explain actor-use case interactions
10. 7 Marks
    bDraw a Sequence Diagram for the cash withdrawal process of an ATM system.
    How to answer

    • Identify objects: User, ATM, Bank Server, Account
    • Show time-ordered messages for withdrawal
    • Draw lifelines, activations, return messages
    • Explain flow from PIN to cash dispense
11. 7 Marks
    aCompare C++ and Java as object oriented programming languages.
    How to answer

    • Compare platform, portability, pointers, multiple inheritance
    • Compare memory management, performance, libraries
    • Tabulate differences on key basis
    • Conclude suitability
12. 7 Marks
    bExplain the role of Exception Handling in object oriented software development with suitable examples.
    How to answer

    • Define exception handling with try-catch-throw
    • Explain robustness and separation of error code
    • Give examples e.g. divide by zero, file not found, ATM invalid PIN
    • Explain hierarchy in C++/Java
13. 7 Marks
    aExplain the architecture of an Object Oriented Database. How is it different from a Relational Database?
    How to answer

    • Explain OODB architecture: object store, ODL, OQL
    • Describe object identity, persistence, complex types
    • Contrast with relational tables, SQL, normalization
    • Give diagram of layers
14. 7 Marks
    bDiscuss the characteristics of an Object Oriented Database Management System. How it is different from RDBMS.
    How to answer

    • List OODBMS characteristics: identity, encapsulation, inheritance, polymorphism
    • Explain persistence, versioning, complex objects
    • Compare with RDBMS on data model and querying
    • Give examples of use
15. 14 Marks
    Explain the following concepts (any three):

    1. (a))Multiple Inheritance
    2. (b))Collaboration Diagram
    3. (c))Object Identity
    4. (d))Dynamic Model
    How to answer

    • Select any three concepts for detailed note
    • Define each with key features and UML/example
    • Give diagram or example where applicable
    • Highlight use in OOAD