Скачать или смотреть Java Interview Question Check Description Below

Basic Java Questions:

What are the main features of Java?

Explain the concept of OOP in Java.

What is the difference between JDK, JRE, and JVM?

What are constructors in Java?

What is the difference between == and equals() in Java?

What are wrapper classes in Java?

What is the purpose of the final keyword in Java?

Explain the concept of method overloading and method overriding.

What is the difference between a static method and an instance method?

What is a Java interface? How does it differ from an abstract class?

Intermediate Java Questions:

What is the Java Collection Framework? Explain some key interfaces.

What is the difference between ArrayList and LinkedList?

Explain the concept of hashCode() and equals() method.

What are checked and unchecked exceptions in Java?

How does garbage collection work in Java?

What is multithreading in Java? How do you implement it?

What are synchronized blocks and methods in Java?

What is the difference between String, StringBuilder, and StringBuffer?

Explain the difference between HashMap and TreeMap.

What is the use of the transient keyword in Java?

Advanced Java Questions:

What is the Java Memory Model?

Explain the concept of volatile variables in Java.

How does the Java Concurrent API work? Give examples.

What is the ThreadLocal class and how is it used?

Explain the concept of reflection in Java.

What is a Java Stream? Explain its advantages.

What is lambda expression in Java? How is it used?

Explain the difference between Executor and ExecutorService.

How do you handle concurrency in Java?

What is the Fork/Join framework in Java?

Practical/Scenario-Based Questions:

How would you optimize a Java application for performance?

Describe a situation where you had to deal with a memory leak in Java.

How would you design a thread-safe singleton class in Java?

Can you explain how you would implement a custom classloader?

What approach would you take to debug a multi-threaded Java application?