Download AKTU OOPS with Java Unit 2 Notes (BCS-403). Covers Exception Handling, try-catch-finally, Checked & Unchecked Exceptions, File I/O, Byte & Character Streams, and Multithreading with 5 Years PYQ solutions in handwritten PDF format.

OOPS with Java Unit 2 Notes – AKTU (BCS-403)

OOPS with Java Unit 2 is one of the most scoring units in AKTU B.Tech CSE (BCS-403). This unit mainly focuses on Exception Handling, File Handling (I/O), and Multithreading — topics that are repeatedly asked in semester exams.

If your concepts are clear in this unit, you can easily secure strong marks in both short and long answer questions.

What is Covered in Unit 2?

Unit 2 builds practical understanding of how Java handles errors, manages files, and executes multiple tasks at the same time.

The major areas include:

Exception Handling in Java
Input and Output (I/O) Streams
Multithreading and Synchronization

Let’s understand each part in a simple way.

1. Exception Handling in Java

Exception Handling helps in managing runtime errors so that the program does not terminate abruptly.

Important concepts from this section:

Difference between Error and Exception
Types of Exceptions
Control flow in exception handling
try, catch, finally blocks
throw and throws keywords
Checked and Unchecked Exceptions
User-defined Exceptions

In AKTU exams, questions are often asked on:

Checked vs Unchecked Exceptions
Purpose of finally block
Example-based explanation of try-catch

Clear definitions with examples can fetch full marks.

2. Input / Output Basics (File Handling)

Java uses Streams to perform input and output operations.

This section includes:

Byte Streams
Character Streams
Reading files in Java
Writing files in Java
FileInputStream and FileOutputStream
BufferedReader and BufferedWriter

Common exam questions include:

Difference between Byte Stream and Character Stream
Program to read a file
Short note on File Handling

Understanding stream hierarchy makes answers more structured.

3. Multithreading in Java

Multithreading allows multiple tasks to run simultaneously in a program.

Key topics covered:

What is a Thread?
Thread Life Cycle
Creating Threads
Thread Priorities
Synchronization
Inter-thread Communication

The Thread Life Cycle diagram is frequently asked in AKTU exams. Make sure you can draw and explain it properly.

Why Unit 2 is Important for AKTU Students

Unit 2 is practical and application-based. It tests whether you understand:

How Java handles runtime errors
How files are processed
How concurrent execution works

Many 7-mark and 10-mark questions come directly from this unit.

Handwritten Notes + 5 Years PYQ

For quick revision, we have prepared structured handwritten notes including:

Important definitions
Concept explanations in simple language
Frequently asked previous year questions
Exam-oriented answers
Diagrams where required

These notes are designed especially for AKTU BCS-403 students who want focused preparation without wasting time.

Download the complete Unit 2 PDF below for detailed preparation.

OOPS with Java Unit 2 Notes AKTU (BCS-403)