Core Java: What are the OOPs principles in Java? Difference between == and .equals() in Java. Explain the concept of Inheritance and give a real-time example. What is the difference between ArrayList and LinkedList? How does Garbage Collection work in Java? Coding Question: Write a Java program to reverse a string without using in-built functions. Write a program to find the transpose of a matrix. Exception Handling: Difference between Checked and Unchecked exceptions. What is a try-catch-finally block? Multithreading: What is a thread? Difference between Runnable and Thread class.