CS-305 Object Oriented Programming and Methodology - Jun 2023 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
   aCompare the object-oriented programming language with procedure programming language.
   How to answer

   • Definition of procedural programming vs OOP
   • Key differences: focus on functions vs data/objects
   • Access specifiers and data security differences
   • Reusability features (inheritance) vs top-down structure
   • Tabular comparison summarizing key points
2. 7 Marks
   bExplain features of object-oriented programming with giving suitable examples.
   How to answer

   • List main features: Classes, Objects, Data Abstraction, Encapsulation, Inheritance, Polymorphism, Dynamic Binding
   • Detailed explanation of each feature
   • Suitable real-world and code examples for each feature
3. 7 Marks
   aExplain the concept of Encapsulation and data abstraction in detail. Write a C++ program to show these concepts in object-oriented programming methodology. Define scope and life of any variable.
   How to answer

   • Definition and detailed explanation of Encapsulation and Data Abstraction
   • C++ program illustrating private members and public getters/setters
   • Definition of scope (local, global, block, class scope)
   • Definition of variable lifetime/storage duration
4. 7 Marks
   bWhat is Message Passing? How it can be achieved in C++ Programming language?
   How to answer

   • Definition of message passing in OOP context
   • Mechanics: Object name, method name, and arguments passed
   • Syntax and code example in C++ demonstrating an object invoking a function
5. 7 Marks
   aWhat is Association? Explain different types of association with example.
   How to answer

   • Definition of Association between classes/objects
   • Types: One-to-One, One-to-Many, Many-to-Many; Aggregation (weak 'has-a') and Composition (strong 'has-a')
   • Examples and diagrams illustrating the relationships
6. 7 Marks
   bDescribe the role of Inheritance in object-oriented programming. Give different types of inheritance.
   How to answer

   • Role/advantages of inheritance (reusability, extensibility, establishing 'is-a' relationship)
   • Types: Single, Multiple, Multilevel, Hierarchical, Hybrid inheritance
   • Brief diagram or syntax for each type
7. 7 Marks
   aDiscuss Polymorphism in detail. What are the different ways to implement Polymorphism in C++, discuss them in brief. Give differences between function overloading and function overriding (or method overriding) by writing its syntax.
   How to answer

   • Definition of Polymorphism (compile-time vs runtime)
   • Ways to implement in C++: function overloading, operator overloading, virtual functions
   • Differences between overloading and overriding with syntax snippets
8. 7 Marks
   bWrite a C++ program to calculate the area using method overloading that accepts input from the user and then shows the desired result.
   How to answer

   • Define overloaded area functions (e.g., area(float r) for circle, area(float l, float b) for rectangle)
   • Prompt user input in main() using cin
   • Invoke corresponding overloaded function and display result using cout
9. 7 Marks
   aExplain the concept of multithreading in object-oriented programming approach? Write its benefits. Discuss the collection and its type. What is a collection class?
   How to answer

   • Concept of multithreading in OOP
   • Benefits: responsiveness, resource sharing, throughput
   • Discussion of Collections and common types (lists, sets, maps/dictionaries)
   • Definition and purpose of a collection class
10. 7 Marks
    bExplain library management system using object-oriented diagram.
    How to answer

    • Overview of Library Management System entities (Book, Member, Librarian, Transaction)
    • Neat Class Diagram / Object-Oriented diagram showing classes, attributes, methods, and relationships
    • Explanation of the workflow and interactions between objects
11. 7 Marks
    aWhat is exception? Write a program to read three numbers $x$, $y$ and $z$ and evaluate $R$ given by $R = z / (x - y)$. Use exception handling to throw an exception in case division by zero is attempted.
    How to answer

    • Definition of exception and exception handling mechanism
    • C++ program with inputs for x, y, and z
    • Check condition (x - y == 0) inside try block and throw exception
    • Catch block handling division by zero and printing appropriate error message
    • Compute and display R otherwise
12. 7 Marks
    bDiscuss the methods of passing an argument in C++. Explain with suitable program.
    How to answer

    • Explain Pass by Value
    • Explain Pass by Reference
    • Explain Pass by Pointer/Address
    • Sample C++ code illustrating swapping or modifying values using each method
13. 7 Marks
    aWrite a program to create a file called Emp.dat with employee number, name, salary, department, deductions, and allowances as per record fields. Open a file, read the record. Calculate the net salary and write it back to the same file.
    How to answer

    • Define an Employee class or struct with specified fields and net_salary
    • Create and write record(s) to 'Emp.dat' using ofstream/fstream
    • Open file in read/write mode (ios::in | ios::out | ios::binary)
    • Read employee record, calculate net salary = salary + allowances - deductions
    • Seek back to appropriate position and write updated record
14. 7 Marks
    bWhat are the functions supported by file stream classes for performing I/O operations?
    How to answer

    • Overview of file stream classes (ifstream, ofstream, fstream)
    • Functions: open(), close(), read(), write()
    • Character/line I/O: get(), put(), getline()
    • Stream pointer manipulation: seekg(), seekp(), tellg(), tellp()
    • Status checking functions: eof(), fail(), bad(), good()
15. 14 Marks
    Write short note on (any two) a) Ambiguity in Multiple inheritance b) Object Model c) Access specifier in C++
    How to answer

    • Ambiguity in Multiple inheritance: Diamond problem, scope resolution operator, virtual base classes
    • Object Model: Principles including abstraction, encapsulation, modularity, hierarchy, typing, concurrency, persistence
    • Access Specifiers in C++: public, private, protected access modes and inheritance visibility rules