Skip to contentSkip to footer

Java Developer Interviews

Salaries
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.

30,867 java developer interview questions shared by candidates

Not much, job description just said knowledge of java+sql and willingness to learn big data. On phone he was nice and I felt good about the job, but the test was another problem. The coding portion of the test was simple, no longer than 1 hour. There is a issue though that you will have to examine tha is something I never really dealt with(probably most jr level people), and I thought that if he expects you to know this inside and out even if you said you dont know big data then how is this question even asked... and on top of that its a deal breaker if he doesn't like your answers(no points for thought process that led to your answer just because they are wrong)... other interview responses here are very accurate. Test could take 4+ hours if your new to the subject(heap analysis) like I was.. unless you know you can answer every question about the test then just pass cuz its a waste of time if you have other interviews lined up. If you do know the answers, write a very good report on it then maybe hell give you a chance for an actual interview on site with what the recruiter said is another technical assessment. At least this process moves fast, phone interview with recruiter + vp of dev + test results all within 1 week. Recruiter was pleasant to work with but that was the only good experience sadly. Company did sound pretty cool though so I really wanted to work there, they said they had several engineer teams and it sounded pretty successful in a good location.
avatar

Junior Java Developer

Interviewed at GumGum

3.9★
Sep 17, 2015

Not much, job description just said knowledge of java+sql and willingness to learn big data. On phone he was nice and I felt good about the job, but the test was another problem. The coding portion of the test was simple, no longer than 1 hour. There is a issue though that you will have to examine tha is something I never really dealt with(probably most jr level people), and I thought that if he expects you to know this inside and out even if you said you dont know big data then how is this question even asked... and on top of that its a deal breaker if he doesn't like your answers(no points for thought process that led to your answer just because they are wrong)... other interview responses here are very accurate. Test could take 4+ hours if your new to the subject(heap analysis) like I was.. unless you know you can answer every question about the test then just pass cuz its a waste of time if you have other interviews lined up. If you do know the answers, write a very good report on it then maybe hell give you a chance for an actual interview on site with what the recruiter said is another technical assessment. At least this process moves fast, phone interview with recruiter + vp of dev + test results all within 1 week. Recruiter was pleasant to work with but that was the only good experience sadly. Company did sound pretty cool though so I really wanted to work there, they said they had several engineer teams and it sounded pretty successful in a good location.

Viewing 1251 - 1260 interview questions

Glassdoor has 30,867 interview questions and reports from Java developer interviews. Prepare for your interview. Get hired. Love your job.