CourseGenix

Java Fundamentals

5 Units21 Lessons

Unit 1

Basics

Introduction to Java Syntax and Hello World Program

Understanding Variables and Data Types in Java

Basic Operators in Java

Real-World Project: Building a Simple Calculator in Java

Input and Output Operations in Java

Unit 2

Control Structures and Loops

Real-World Project: Creating a Number Guessing Game with Loops

Implementing For and While Loops in Java

Using If-Else and Switch Statements in Java

Unit 3

Methods and Functions

Defining and Calling Methods in Java

Working with Parameters and Return Types in Java Methods

Method Overloading in Java

Real-World Project: Developing a String Utility Methods Library

Unit 4

Object-Oriented Programming

Creating Classes and Objects in Java

Inheritance and Polymorphism in Java

Encapsulation and Abstraction in Java

Using Interfaces and Abstract Classes in Java

Real-World Project: Designing a Basic Inventory Management System

Unit 5

Exception Handling and File I/O

Handling Exceptions with Try-Catch in Java

Creating and Using Custom Exceptions in Java

Reading and Writing Files in Java

Real-World Project: Building a Simple Text File Processor

Unit 1•Chapter 2

Understanding Variables and Data Types in Java

Summary

Provide a concise summary under 250 words, focusing on the main topic only, without mentioning sponsors or introductory remarks

Concept Check

0/10

What occurs when assigning a long value exceeding Integer.MAX_VALUE to an int variable?

Compilation error if literal exceeds

Compilation error if literal exceeds

Value truncated without error

Silent overflow at runtime

How does autoboxing handle Integer wrapper with null value?

No exception occurs

Returns zero value

NullPointerException at unboxing

NullPointerException at unboxing

What is the outcome of casting double 3.9 to int?

Result is 3

Result is 3

Result is 4

Compilation fails

In Java, can a final variable be reassigned after initialization?

Yes, with casting

No, it cannot be reassigned

No, it cannot be reassigned

Yes, in same method only

What happens with byte addition causing overflow?

Wraps around silently

Wraps around silently

Throws exception

Compilation error

What is the default value of an uninitialized int variable in Java?

0

undefined

null

0

Which data type in Java is used for single characters?

char

String

int

char

Can a final variable be reassigned after initialization?

No

Yes

No

Only in methods

What occurs during type casting from double to int?

Decimal part truncated

Compilation error

Decimal part truncated

Value rounded up

Which is not a primitive data type in Java?

String

boolean

String

int

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