A position as a senior Java developer at a top tech firm requires at least 5 to 8 years of experience. Recruiters will expect you to be well-versed in Java concepts. When it comes to interviews, the Java interview questions for software developers with 5 years’ experience are more sophisticated and project management focused than those for entry-level candidates.

As a Java developer with 5+ years of experience, you should be well-versed in all of Java programming's fundamentals and trickiest concepts. In this article, we'll look at the Core Java topics as well as other important Java topics that you should study to ace the Java interview questions for candidates with 5+ years of experience.

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To help you ace your Java interview, this article will provide you with the most frequently asked Java interview questions for 5 years of experience in FAANG interviews.

We will cover:

• Topics to Prepare for a Java Interview for Professionals With 5 Years of Experience 
• Top Java Interview Questions for Developers With 5 Years of Experience 
• How to Prepare for a Java Interview for Professionals With 5 Years of Experience?
• FAQs on Java Interview for Professionals with 5 Years of Experience

Topics to Prepare for a Java Interview for Professionals With 5 Years of Experience 

To prepare for an advanced Java interview, you need to cover a wide range of topics. Some of them are:

Core Java

• String Handling
• OOPs Concepts
• Multithreading
• Loops and Data Types
• Generics
• Collection Framework
• Synchronization
• Serialisation & De-serialisation

Frameworks

• Struts
• Spring (MVC, Core, JDBC)
• Web Services (SOAP and REST)
• JSF
• Hibernate ORM Framework

Advanced Java

• JSP
• JDBC (Java Database Connectivity)
• Servlets

Here are some Java concepts explained in detail to help you prepare for your interview:

• LinkedList in Java
• Removing all non-alphanumeric characters from a string in Java
• Scanner reset()
• PriorityQueue in Java
• Substring in Java
• Overriding in Java
• Reversing a String in Java
• HashMap in Java with examples
• Math Random Method

Top Java Interview Questions for Developers With 5 Years of Experience

We have curated the top Java interview questions for professionals holding 5 years’ experience and categorized them according to work experience and important topics such as OOP and thread handling.

Here are some of the most commonly asked Java Interview Questions and Answers for 5 years of Experience.

Q1. Which, according to you, are the most significant features of Java 8?

Answer: Most developers have stuck to the 2014 release, Java 8. It is free for commercial use and has many significant features such as functional interfaces and static methods. It has made programming more simplified and efficient with functional interfaces to object-oriented interfaces.

Q2. What is a Java Class? Can you tell us about some of the common classes of Java?

Answer: A Java Class is a category for Java objects presenting similar properties or methods. It is commonly used as a blueprint for design in object-oriented languages. The most common classes of Java used in app development are static, final, concrete, inner, abstract, and POJO.

Q3. What are the essential concepts to understand in wrapper classes?

Answer: The most significant concepts to understand in wrapper classes are the eight primitive types of wrapper classes and where they are best used. It is important to note that it is final and immutable once a wrapper class is assigned.

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Q4. What are the four access modifiers in Java, and where are they used?

Answer: The four access modifiers in Java are default, public, private, and protected. They are used in determining access levels to keywords or information stored in a class.

Q5. Differentiate between JVM and JDK.

Answer: A JVM, or a Java Virtual Machine, runs Java on a device. A JDK, or Java Development Kit, is a software development package used to create tools that can be run on phones and tablets.

Q6. What is platform independence?

Answer: Platform independence implies that your program can run on any operating system. This adaptability trait makes Java a superior programming language.

Q7. What is the main reason why strings are made immutable?

Answer: An immutable string is thread-safe. If one does not make a string immutable, then a change in one reference will inevitably affect the values of other references.

Q8. What is the difference between an abstract class and an interface?

Answer: There are some basic differences between an abstract class and an interface. The first is method implementation. While an abstract class can have method implementation but an interface can not. An abstract class can implement an interface.

‍Q9. What do you understand about a ternary operator?

Answer: Java has several conditional operators. A ternary operator is a conditional operator responsible for deciding which values will be assigned to a variable.

Q10. Let’s talk about serialization and deserialization a little.

Answer: Sure! Serialization and deserialization are data handling concepts related to stream handling in Java. Serializing an object means converting it to a byte stream to save or relocate it to another device. Deserializing is the process of undoing the serialization process.

Here are some more Java Interview Questions to nail tech interviews.

Java Interview Questions for Developers with 3 to 5 Years of Experience

These are some frequently asked Java interview questions to 3 to 5 years of experienced developers:

1. What is a public class?
2. What is a local variable?
3. How will you create a thread in Java?
4. What do you understand about design patterns?
5. Which design pattern have you used in your past projects?
6. Explain double-level locking in a singleton design pattern.
7. How will you use BlockingQueue to implement a producer-consumer problem?
8. What are the ways to detect memory leaks in an application?
9. How will you print odd-even numbers using threads in sequence?
10. On what basis will you decide the young generation and old generation size for an application?

Some More Sample Java Interview Questions for Developers With 5 Years of Experience

1. Explain method overloading Java. 
2. Let’s talk about the equals methods.
3. Explain the concept of a catch block.
4. Describe what it's like working with threads in Java.
5. How will you attain thread safety in Java?
6. Explain if it is possible to call a run() method of a Thread class.
7. How is a program’s Java Thread Dump found?
8. Describe the process of multithreading in Java.
9. What is the one thing you would keep in mind when multithreading in Java?
10. What is context-switching?
11. What will be the output of the program given below?

class A

{

    synchronized void m1()

    {

        System.out.println("In m1 A");

    }

    void m2()

    {

        System.out.println("In m2 A");

    }

}

Java OOPs Interview Questions for Developers With 5 Years of Experience

Here are some Java OOPs interview questions for developers who have 5 years’ experience:

1. Is Polymorphism supported in Java?
2. Can you implement a class with two interfaces where both the interfaces include a method having the same name and signature?
3. How much memory is occupied by a class?
4. Do you always need to create objects from class?
5. What possible challenges can you face when implementing the concept of multiple inheritances in Java?
6. Name the types of constructors in Java.
7. Explain the concept of a ternary operator in Java.
8. How is an interface different from an abstract class?
9. Can you declare a constructor private in Java?
10. What is exception handling?
11. What is Garbage Collection in OOPs?
12. Why is encapsulation also called Data Hiding in Java?
13. Can a Java application be run without the implementation of OOPs?
14. What is ‘super super’ in java?
15. What will be the output in the code below?

public class Demo{ 

   public static void main(String[] arr){ 

         System.out.println(“Main1”);

   } 

   public static void main(String arr){  

         System.out.println(“Main2”);

   } 

}

Want to practice more? Here is a compilation of the most important Java OOP questions with answers asked in tech interviews.

Java Thread Interview Questions for Developers with 5 Years’ Experience

When preparing for your Java Advanced interview, you should also practice some Java Thread interview questions and answers for 5 years of experienced professionals. Here are some sample Java Thread interview questions:

1. How will you create a daemon thread in Java?
2. Demonstrate a portfolio that will include multithreading. 
3. Explain how a task is scheduled to run after an interval in Java.
4. Describe thread implementation in Java.
5. What is time slicing?
6. What is a thread schedule?
7. What is the difference between a synchronized block and a synchronized method?
8. Describe the steps of calling wait(), notify() and notifyAll().
9. Explain the concept of ThreadLocal.
10. How will you fix (a given) Java multithreading implementation?
11. What is ThreadGroup? Why do companies not use it anymore?
12. What will happen in a scenario where you do not override the thread class run() method?
13. Discuss the concept of a ThreadPool.
14. Describe the method of ensuring that three threads (T1, T2, T3) run in sequential order.
15. Describe the concepts of Future and Callable.
16. Differentiate between thread and process.
17. Describe the concept of atomic classes in Java Currency API.
18. In what ways was the Currency API updated in Java 8?

Recommended Reading: 170 UI Developer Interview Questions for Experienced Candidates

Leave no stone unturned for your Java interview preparation. Study every aspect of a Java interview for developers with 5 years of experience. Be thorough about programming data structures and algorithms, systems design, and specific domain know-how about JavaScript, along with in-depth preparation for behavioral and leadership interview rounds. Experts recommend practicing mock interviews and Java interview questions before you face the actual interview to boost your confidence and prepare you for all kinds of interview situations.

At Interview Kickstart, you can practice mock interviews with experts and hiring managers from FAANG companies. Their valuable feedback has gone a long way in helping Java professionals such as yourself crack tech interviews at the top FAANG companies.

FAQs on Java Interview Questions for Professionals with 5 Years of Experience

Q1. What is the salary of a Java Developer with 5 years of experience?
The average salary of a Java Developer with 5 years of work experience is approximately $100,682 per year.

Q2. What is the future of experienced Java Developer jobs?

Based on surveys conducted by Stackoverflow and Dice, experienced Java developers are still in popular demand and have a higher pay compared to other programming languages. Even though new programming languages are continuously coming up, Java has continually evolved to catch up with them. Besides, many tech giants rely on Java to run their systems and continue to do so for many years since completely refactoring them all at once is not feasible.

Q3. Which companies use Java?
A. Some of the major companies that use Java to run their systems are Google, Netflix, Instagram, Uber, Spotify, Airbnb, Pinterest, Netflix, Amazon, Slack, and many more.

Q4. What are the top skills an experienced Java Developer should have?
A. Besides basic Java skills, the top advanced skills an experienced Java Developer should work on are — AI and machine learning, Python, Blockchain, Amazon Web Services, Mobile technologies such as Android and OS, Hadoop/Big Data, Advanced JavaScript framework such as Angular, React, and VueJS, and Spring Boot/microservices.

Q5. What are the top Java interview questions for 5 years of experienced developers?

For Java professionals with 5 years’ experience, the most commonly asked interview questions are: What are the top features of Java 8? What is a Java Class? What is polymorphism in Java? How is an interface different from an abstract class? What is exception handling? What is Garbage Collection in OOPs? 

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