What is the internal working of Map
Java Developer Interviews
Java Developer Interview Questions
In your interview for a java developer position, be prepared to answer technical questions that test your understanding of Java basics. Interviewers may also ask open-ended questions to assess your coding and problem-solving abilities. Prepare for non-technical questions that focus on time management, interpersonal communication, and work ethic.
Top Java Developer Interview Questions & How to Answer
Question 1
Question #1: What is the difference between HashTable and HashMap in Java?
How to answer
How to answer: Interviewers use technical questions to assess your formal training and understanding of the Java programming language. Use your answer to demonstrate your communication skills. Even if you have been coding for some time, it can be helpful to review Java basics before your interview.
Question 2
Question #2: Write a program to determine if 243 is an Armstrong number.
How to answer
How to answer: Interviewers use open-ended questions to test your coding skills. This question allows the employer to assess your ability to solve a problem using a Java algorithm. Explain your thinking process as you use a code editor or whiteboard to solve the problem.
Question 3
Question #3: How do you produce quality code when you have several Java projects to complete at once?
How to answer
How to answer: Java developers often juggle multiple projects at the same time. Interviewers use questions such as this to test your time management and organizational skills. Employers are also trying to assess your commitment to quality work. If you have experience as a developer, include examples from your work history that demonstrate high-quality work and effective time management.
30,904 java developer interview questions shared by candidates
Difference between Spring MVC & SpringBoot
What are the type of exceptions that you have come across during your work?
is http and sockets are same.
1.what are the benifits of Springs and why we need to go for Springs? 2.What are the configuration files in a typical Hibernate Application ? 3.What are the different directives in JSp? 4.how to create custom Tags in JSP? 5.what is constructor and what is the use of it? 6.What are all the different types of Joins in SQL and whats the difference between outer join and full join ? and some basic core java questions like trim method,multithreading etc.
Analytical Questions related to patterns like If ‘hi abc’ is ‘jk hgsjk’ The what is ‘abc’
It consisted of a telephonic, basic of java : overriding, overloading rules, design patterns, sort may on key and values. Java 8 Date Time API, streams, lambda expressions. Then a face to face with the Technical Manager : we had a general discussion about the job role. He asked me some questions on Executor framework, why we have it. Spring scenario oabout what if a singeltion scope bean uses a prototype scope bean. The was a design assignment given to solve in office : Design a Library. It has user stories and each user story had new functionality. Was not too tough. Adding members(name,phone number), taking care of duplicate members, book (name, isbn number, type). Then to make add member function thread safe.
One example: in the same class you have methods with the same names, both with one parameter, first is taking Object and second is taking String. You call the method with null parameter, which method will be called and why? (Would you write a code like this in a real project?)
Difference between HashMap and Hashtable? Please considered other collection classes too for compression.
Core java questions, some design patterns, frameworks and your previous job experiences
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