Pritish Halder’s Code Guide to Crack Java Programming Interviews

a man coding on his laptop

a man coding on his laptop

You might find yourself lost in a sea of information as you sit down to prepare for your Java interview. What you should focus on depends on the experience level you’re applying for. However, there are some fundamental topics you should know, no matter your experience with the language. To efficiently crack the Java interview, you’ll need to know Data Structures, Algorithms, and OOP concepts.

For more experienced individuals, concurrent programming, JVM internals, GC tuning, and other such advanced topic knowledge is a must.

A-List of Topics to Prepare for Java Interview

Although the interview questions will depend on your experience and the role you’re applying for, there are a few topics every Java developer should know by heart:

  1. Java Fundamentals
  2. Data Structure and Algorithms
  3. Object-Oriented Concepts
  4. Multithreading, concurrency, and thread basics
  5. Java Collections Framework
  6. Date type conversion and fundamentals
  7. Array
  8. Garbage Collection
  9. String
  10. SOLID design principles
  11. GOF Design Patterns
  12. Abstract class and interface
  13. Java basics, e.g., equal and hashcode
  14. Generics and Enum
  15. Java IO and NIO
  16. Data structure and algorithm in Java
  17. Common Networking protocols
  18. JVM internals
  19. Regular expressions
  20. JDBC
  21. Java Best Practices
  22. XML Processing in Java
  23. Date, Time, and Calendar
  24. JUnit
  25. Programming questions
a female programmer coding in Java

a female programmer coding in Java


Basic Java Interview Questions to Prep For:

Here’s a list of questions you should know answers to if you have 2 to 3 years of experience in Java.

  1. How does Java achieve platform independence?
  2. What is ClassLoader in Java?
  3. Difference between ArrayList and HashSet in Java?
  4. How HashMap works in Java?
  5. Write a Java program to check if a number is Even or Odd?
  6. When to use the volatile variable in Java?
  7. When to use a transient variable in Java?
  8. Can we override the private method in Java?
  9. Difference between Hashtable and HashMap in Java?
  10. Difference between List and Set in Java?
  11. Difference between ArrayList and Vector in Java
  12. Difference between wait and sleep in Java?
  13. Difference between ArrayList and LinkedList in Java?
  14. Difference between method overloading and overriding in Java?
  15. Difference between Polymorphism and Inheritance in Java?
  16. What is Abstraction in Java?
  17. What’s the difference between abstraction and encapsulation?
  18. How to make a Java class immutable?
  19. What is thread-safety?
  20. How to write a deadlock and resolve in Java?

Explore a World of Java Programming Questions with Pritish Halder

Becoming great at Java doesn’t happen overnight. Practice through some important advanced java interview questions to get a better idea of what you need to focus on. With Pritish K Halder’s core java interview questions, you’ll be a Java Whiz in no time at all.

Contact us today to learn more.