How to Crack Java Interviews in 2024

Are you an upcoming or veteran Java developer looking for ways on how to crack Java interviews in 2024 ? With Artificial Intelligence existing in the modern day technology, it has become really difficult to clear java interviews as people are more focused on sorting out unproductive candidates.

Don’t worry, you’ve got nothing to be scared of. In this blog we will discuss the various topics they ask questions on in java interviews across all levels . Moreover, this blog post is specially curated to help you in learning how to crack Java interviews. Stick around to discover the top tips and tricks to perform ten times better in your interviews.

We will provide you with the required materials, be it the list of the best java interview questions, or tips for crafting your resume. Let’s begin the blog by reading about some different types of Java developers and the respective java interview questions asked in those

How to Crack Java Interviews? - Topics To Study

In this section, we will discuss the possible topics you need to prepare before going for a java developer interview. Let’s start with core Java and then reach more complex topics.

1. Core Java

When interviewing for a Java Developer, it's important to focus on Core Java subjects and deliver a complete answer. While not understanding any framework is not a problem, being unfamiliar with Core Java may be. By studying this topic, you will thoroughly be able to learn how to crack java interviews in 2024.

Topics To Study For

• String Concepts and Hashcode-Equal Methods
• Immutability (custom immutable classes and examples in JDK)
• OOPS ideas (all four pillars and the solid principle).
• Serialization (serialversion UUID)
• Collection Framework/Concurrent Collection (Hashamap, concurrent hashmap, ArrayList, HashSet).
• Exception Handling (Especially Runtime Exceptions)
• Multithreading, particularly Executor Framework, which contains ThreadPool (deadlock, Thread-dump).
• The Java Memory Model describes how objects, methods, and variables are stored in each section of Java memory.
• trash collection (how it works, how it trash collects objects, and the method used to do so)

Core Java Developer Interview Questions

• How do you make a bespoke immutable class? What are some instances of immutable classes in Java?
• What are hashCode() and equals()? What happens if you use Object as a custom key in a map? How do I use it correctly?
• How does the ThreadPoolExecutor work?
• What are deep and shallow copies?
• What is the Java Memory Model as of the most recent Java version?
• The Java APIs Arrays.sort() and Collections.sort() employ what algorithm?
• How does one construct a custom annotation in Java?
• What is a CompletableFuture?
• What are deep and shallow copies?
• How do HashMaps and HashSets function internally?
• What is a Completable Future?

2. Project flow and Architecture

In this issue, the interview incharge would want to assess if the candidate has any experience. If not, then they start asking you questions about your initiative. The interviewer will ask about its usefulness, flow, and architecture. They will also inquire about the tech stack, how it is implemented in production, and their function and contributions.

Please write down all you know about your project someplace so you fall short later. Remember, you are the only one who knows anything about it, so be confident.

Typical interview question would be:

• Please inform me about your project's architecture. Please describe and illustrate the architecture, framework, and technology utilized.

3. Java-8/Java-11/Java17

To excel in Java interviews, it's crucial to grasp the significant features introduced in recent Java APIs. A strong understanding of topics like optional API? is essential for demonstrating your expertise. Here is a detailed list of topics you should study:

Topics to Study

• Java 8 features
• Default/Static methods
• Lambda expression
• Functional interfaces
• optional API
• stream API
• pattern matching
• text block
• modules

Java-8/Java-11/Java-17 base Questions

• What is new in Java 8/Java11/Java17?
• What is a parallel stream in Java and how does it work?
• What is the new improvement in the Java memory model, improvement in Java 8 hashmap?

To accurately answer this question, it's essential to be aware of Java's version-specific features. For instance, virtual threads were introduced in Java 21, while sealed classes debuted in Java 17.

35 + Best Java Interview Questions For Freshers

If you are looking for Java basic interview questions, then this list of best java interview questions for freshers gives everything you need to prepare for your interview!

• How can you implement a Stack using an Array?
• How do you reverse a linked list in Java?
• How do you handle multiple exceptions in Java?
• How do you implement a merge sort algorithm in Java?
• How do you construct a bubble sort algorithm in Java?
• How do you construct a binary search algorithm in Java?
• What is a thread in Java? Give an example of how to construct a thread.
• What is the distinction between static and non-static variables in Java?
• What is a deadlock in Java? What can you do to avoid it?
• What is an interface in Java? Provide an example.
• What is the distinction between a while loop and a do-while loop in Java?
• What's the distinction between a private and a protected method in Java?
• What is the difference between a String, StringBuilder, and StringBuffer in Java?

• What is a binary search tree? How can you implement one in Java?
• What is the difference between an abstract class and an interface in Java?
• What is the difference between a shallow copy and a deep copy in Java?
• What is Java?
• What are the features of Java?
• What is JVM?
• What is the difference between JDK, JRE, and JVM?
• What is the difference between a class and an object?
• What is object-oriented programming?
• What are the four principles of OOP?
• What is inheritance?
• What is encapsulation?
• What are the different types of variables in Java?
• What is polymorphism?
• What is an array?
• What are control structures in Java?
• What is abstraction?
• What are access modifiers?
• What are static variables and methods?
• What are the final variables and methods?
• What is a constructor?
• What is exception handling?
• What are the different types of exceptions in Java?
• Provide an example of Polymorphism.

Wrapping Up Words

Commit to studying all these topics, our comprehensive guide will help you in learning how to crack your Java interviews . Remember, practice hard and try to consume the knowledge rather than swallowing it.

If you are a business looking for Java developers and are unable to locate the right talent? Then you should consider partnering with an IT recruitment agency such as Vanator RPO . We can help you find the righteous talent!

Read Also: How to Crack Java Interviews in 2024