Java Interview Questions and Answers

Java is a platform-independent high-level object-oriented programming language.

Java is an object-oriented programming language. Sun Microsystems was the company that created it. Java is used to create a wide range of apps, websites, and games.

1. What is Java, and why is it a platform-independent programming language?

2. What makes Java different from other object-oriented languages?

3. In C/C++, pointers are used; however, why is it not used in Java?

4. Can you explain what an instance variable and a local variable are?

5. What exactly do you mean when you say "data encapsulation"?

6. Tell us a little about the JIT compiler.

7. In Java, what is the difference between the equals () function and the equality operator (==)?

8. In Java, how is an endless loop declared?

9. Describe function Object() { [native code] } overloading in a few words.

10. Use appropriate examples to discuss method overloading and overriding.

11.  In a Java program, a single try block and many catch blocks can coexist.

Explain.

12. Describe how the final keyword is used in variables, methods, and classes.

13. What is the difference between final, lastly, and finalize

14. When is it OK to employ a super keyword?

15. Is it possible to overload static methods?

16. Is it possible to override static methods?

17. What is the primary goal of waste or garbage collection?

18. In the garbage collection procedure, which part of memory is cleaned: the stack or the heap?

1. What is Java?

2. How to install Java?

3. How to reverse a string in Java?

4. What is a thread in Java?

5. How to take input in Java?

6. How to set a path in Java?

7. What is enumeration in Java?

8. What is inheritance in Java?

9. How to compare two strings in Java?

10. What is Abstraction in Java?

11. What is Encapsulation in Java?

12. What are the features of Java?

The Object is a real-time entity that has a state and behaves in some way. A dog, for example, has states such as color, name, and breed, as well as behaviors such as waving the tail, barking, and eating. In Java, an object is a class instance with an instance variable representing the object's state and methods representing the object's behavior. The new keyword can be used to construct a class object.