Core Java interview questions often focus on the fundamental concepts and key features of the Java programming language. Some common topics include:
OOP Principles: Understanding Object-Oriented Programming (OOP) concepts such as encapsulation, inheritance, polymorphism, and abstraction.
Data Types: Different data types in Java, including primitive types (int, float, etc.) and reference types (arrays, objects).
Control Structures: Loops (for, while, do-while) and conditional statements (if-else, switch).
Java Collections Framework: Understanding lists, sets, maps, and queues, and when to use each.
Exception Handling: The difference between checked and unchecked exceptions, and how to handle them with try-catch blocks.
