Welcome To Our Website’s Basic JAVA Interview Questions With Short Answers Page! If You Are Preparing For A Job Interview That Involves JAVA, You Have Come To The Right Place.

Our Page Provides A Collection Of Frequently Asked Interview Questions Related To JAVA, Along With Concise And Straightforward Answers To Help You Prepare For Your JAVA Interview.

Basic JAVA Interview Questions With Short Answers

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What is Java?
Answer: Java is a high-level, object-oriented programming language used to develop a variety of applications, from web applications to mobile apps.

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What is JVM?
Answer: JVM (Java Virtual Machine) is an abstract machine that provides a runtime environment in which Java bytecode can be executed.

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What is the difference between JDK and JRE?
Answer: JDK (Java Development Kit) is a software development kit that includes tools for developing Java applications, while JRE (Java Runtime Environment) is a runtime environment that enables Java programs to run on a computer.

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What is an object in Java?
Answer: An object is an instance of a class that has its own state and behavior.

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What is a class in Java?
Answer: A class is a blueprint for creating objects that define the attributes and methods of an object.

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What is inheritance in Java?
Answer: Inheritance is a mechanism that allows a class to inherit the properties and methods of another class.

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What is polymorphism in Java?
Answer: Polymorphism is the ability of an object to take on many forms, allowing different objects to respond to the same message or method call in different ways.

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What is an interface in Java?
Answer: An interface is a collection of abstract methods that define the behavior of a class.

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What is a package in Java?
Answer: A package is a group of related classes and interfaces that are organized together.

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What is a constructor in Java?
Answer: A constructor is a special method used to initialize objects when they are created.

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What is an exception in Java?
Answer: An exception is an event that occurs during the execution of a Java program that disrupts the normal flow of the program.

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What is a thread in Java?
Answer: A thread is a lightweight process that enables a program to perform multiple tasks concurrently.

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What is synchronization in Java?
Answer: Synchronization is a mechanism that allows multiple threads to access shared resources in a mutually exclusive manner to avoid data inconsistency.

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What is the difference between String and StringBuffer/StringBuilder?
Answer: String is an immutable object, while StringBuffer/StringBuilder are mutable objects that can be modified.

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What is a static method in Java?
Answer: A static method is a method that belongs to a class and can be called without creating an instance of the class.

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What is the difference between an abstract class and an interface in Java?
Answer: An abstract class can have both abstract and non-abstract methods, while an interface can only have abstract methods.

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What is garbage collection in Java?
Answer: Garbage collection is a process that automatically frees up memory by removing objects that are no longer in use by the program.

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What is the purpose of the final keyword in Java?
Answer: The final keyword is used to make a variable, method, or class constant and unchangeable.

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What is the difference between public, private, and protected access modifiers in Java?
Answer: Public members can be accessed from anywhere, private members can only be accessed within the same class, and protected members can be accessed within the same package or subclass.

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What is the purpose of the main method in Java?
Answer: The main method is the entry point of a Java program and is where the program starts executing.

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Conclusion

Whether You Are A Beginner Or An Experienced In Java, Our Questions Cover A Wide Range Of Topics And Difficulty Levels To Suit Your Needs.

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