(SEM IV) THEORY EXAMINATION 2023-24 OBJECT ORIENTED PROGRAMMING WITH JAVA

This document is a B.Tech (Semester IV) Theory Examination Question Paper for the subject BCS403 – Object Oriented Programming with Java, conducted in the academic year 2023–2024. It is a 70-mark, 3-hour examination designed to assess students’ understanding of Java fundamentals, OOP concepts, exception handling, multithreading, collections, functional programming, and foundational Spring Framework concepts.

The paper is divided into three sections—A, B, and C—each evaluating different levels of Java programming knowledge.

SECTION A – Short Answer Questions (14 Marks)

Seven questions (2 marks each) that test basic and essential Java concepts:

JVM and bytecode in Java architecture

Definition of classes and objects with examples

Interfaces in Java

Keywords used in exception handling (try, catch, throw, throws, finally)

Thread life-cycle states

Writing a Java program to create and iterate an ArrayList<String>

Concept of Sealed Classes in Java with example

These questions check fundamental clarity of OOP, Java syntax, and basic coding ability.

SECTION B – Intermediate / Application-Oriented Questions (21 Marks)

Students must attempt any three of the five 7-mark questions. Topics include:

Abstraction and abstract classes with examples

Methods of creating threads in Java (Thread class, Runnable interface)

Functional interfaces and lambda expressions

Diagrammatic explanation of Java Collections Framework, including List, Set, Queue

Difference between Dependency Injection (DI) and Inversion of Control (IoC) in Spring

This section tests deeper OOP design understanding and Java application development patterns.

SECTION C – Advanced / Coding & Conceptual Problems (28 Marks)

Each main question contains two options, and students must attempt one from each.

3. OOP Concepts & Constructors

Explanation of polymorphism (compile-time & runtime) with overriding example using Shape and Rectangle

Definition & use of constructors; writing a Student class and creating objects

4. Exception Handling & Thread Synchronization

Difference between checked vs unchecked exceptions, with program on ArithmeticException

Differences between:

Character streams vs Byte streams

wait() vs notify()

5. Java Stream API / Switch Expression

Intermediate & terminal stream operations; program to print sum of even numbers from ArrayList

Comparison of traditional switch-case vs modern switch expression with example

6. Collections – LinkedList / HashMap

LinkedList methods with example

HashMap operations with example

7. Spring Framework Topics

Spring container and bean life cycle

Spring Boot framework, benefits, and RESTful API concepts

This section evaluates coding skills, deeper design principles, Java 8+ features, and introductory Spring framework knowledge.

Overall Purpose of the Document

This exam paper is structured to evaluate a student’s:

Understanding of Object-Oriented Programming concepts in Java

Ability to write and analyze Java code

Knowledge of exception handling, multithreading, collections, streams

Familiarity with modern Java features like lambda expressions and sealed classes

Introductory understanding of Spring & Spring Boot frameworks

The paper combines theory, examples, program writing, and conceptual explanations to assess practical and academic Java proficiency.