Nailing the Java interview questions is crucial for anyone aspiring to land their dream job in the software development industry. Whether you are a fresh graduate or an experienced professional, being well-versed in Java fundamentals and advanced concepts is a must. In this comprehensive guide, we have compiled 130 Java interview questions covering a wide range of topics, from basic Java syntax to complex design patterns and frameworks.
Java Basics
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What is Java, and what are its key features?
Java is a versatile, object-oriented programming language developed by Sun Microsystems (now Oracle). Its key features include platform independence, automatic memory management, and robust security mechanisms. -
Explain the differences between JDK, JRE, and JVM.
JDK (Java Development Kit) is a software development environment used to develop Java applications. It includes the JRE (Java Runtime Environment), compiler, debugger, and other tools. JRE is a software package that provides the runtime environment for running Java applications. JVM (Java Virtual Machine) is a virtual machine that executes Java bytecode. -
What is the purpose of the
statickeyword in Java?
Thestatickeyword is used to declare a member (variable or method) at the class level. Static members belong to the class itself, rather than any specific instance of the class. -
Explain the concept of object-oriented programming (OOP) in Java.
Object-oriented programming (OOP) is a programming paradigm that focuses on creating objects
