The latest articles on DEV Community by Jian Wei Tee (@jian_weitee_f32a164fa000). https://dev.to/jian_weitee_f32a164fa000 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2646713%2Fc9c4165a-7706-47f0-a213-026671ccf1b5.png https://dev.to/jian_weitee_f32a164fa000 en Jian Wei Tee Thu, 02 Jan 2025 14:51:14 +0000 https://dev.to/jian_weitee_f32a164fa000/java-interview-questions-for-freshers-1-2-5edh https://dev.to/jian_weitee_f32a164fa000/java-interview-questions-for-freshers-1-2-5edh <p><em>Edited from: <a href="https://www.geeksforgeeks.org/java-interview-questions/" rel="noopener noreferrer">https://www.geeksforgeeks.org/java-interview-questions/</a></em></p> <h1> 1. Is Java Platform Independent if then how? </h1> <p>Javac compiles the program into bytecode, which is stored in a .class file. This file can be executed on any operating system as long as a JVM (Java Virtual Machine) is preinstalled. Therefore, bytecode can be created on one system and executed on another, making Java platform-independent.</p> <h1> 2. What are the top features of Java? </h1> <ul> <li> <strong>Simple:</strong> Java is simpler compared to other languages such as C and C++ because it eliminates the need to manually create and release allocated memory using pointers. Instead, Java implements a garbage collection mechanism to automatically release unused references.</li> <li> <p><strong>Object-Oriented:</strong> Java is an object-oriented language that supports the concepts of classes and the four pillars of OOP (Object-Oriented Programming).</p> <ul> <li> <strong>Encapsulation:</strong> Controls data access using access modifiers such as <code>public</code>, <code>private</code>, and <code>protected</code>.</li> <li> <strong>Inheritance:</strong> Promotes code reuse by allowing a child class to inherit the properties and methods of a parent class.</li> <li> <strong>Polymorphism:</strong> Enables a single method to behave differently based on the object that invokes it. This can be achieved through method overloading (compile-time polymorphism) and method overriding (runtime polymorphism).</li> <li> <strong>Abstraction:</strong> Allows users to interact with an object through a well-defined interface without needing to understand its implementation details. This can be achieved using abstract classes and interfaces.</li> </ul> </li> <li><p><strong>Multithreaded:</strong> Allows multiple threads to run concurrently within a program. A concurrency framework is provided under the <code>java.util.concurrent</code> package. </p></li> </ul> java interview