Lab49 Java Developer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 6 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Lab49.
Lab49
Senior Java Developer
Senior Average Negative experience No offer 4 rounds
Interview process
Recruiter call Phone screen Technical screen Onsite Background check Offer
Interview formats
Technical Behavioral
So I had this super disappointing experience. I went through four rounds of interviews and they verbally told me I got the job. I trusted them and even turned down another offer. Then, after 15 days of no contact, they suddenly told me my profile was 'on hold.' They gave no explanation, took no responsibility, and offered no apology for the delay or how it messed up my career plans. It really shows a lack of professionalism and empathy for candidates. It makes me wonder how they treat their employees if this is how they handle hiring. I'd tell future candidates to be careful and not rely on anything they say verbally.
Confirmed questions1 question
- Would you be willing to work 7 days a week, like people used to do without holidays?
Lab49
Java Developer
Entry Difficult Positive experience Accept offer 2 rounds
Interview process
Recruiter call Technical screen Take home
Interview formats
Technical Coding
The interview process was very professional with prompt communication. Overall, I felt well taken care of and am awaiting the final steps. There was one telephone interview and a coding challenge that I found quite challenging but enjoyable. I really appreciated the interviewer's thought process.
Confirmed questions1 question
- Tell me about core Java concepts using scenarios.
Lab49
Java Developer
Mid Average Negative experience No offer 3 rounds
Interview process
Recruiter call Phone screen Technical screen Onsite Background check Offer
Interview formats
Technical Behavioral
I found this job on LinkedIn, and it seemed really interesting so we started the interview process. It had a few parts: first, at least two technical phone interviews, and then a Skype interview with a Senior Stuff Member. The technical interviews were pretty good. The first one covered OOP and Java Basics like collections and structures. The second one was about Threads, non-blocking algorithms, and Design Patterns, including how to apply them. We also designed an object hierarchy for a specific business domain. I was enjoying it as a Java Developer because I hadn't encountered any strange or unsuitable questions yet. The third interview was with a Senior Stuff Member. I didn't get the job, and after that interview, I got a very brief rejection without any explanation. The questions in that interview were about my experience as a Java Developer, if I knew about other Java-based languages and used them, and about past projects and challenges. It was basically just a conversation. I'm frustrated and not happy with how it ended because they didn't explain why I wasn't selected.
Confirmed questions1 question
- What do you know about non-blocking algorithms?
Lab49 Java Developer Interview Questions
Quoted word for word from Lab49 interview reports.
“Could you explain how to make a class immutable that has two variables, a String and a Collection of Integers?”
Read reports →“What do you know about non-blocking algorithms?”
Read reports →“Would you be willing to work 7 days a week, like people used to do without holidays?”
Read reports →“Can you describe what makes code maintainable?”
Read reports →“Tell me about core Java concepts using scenarios.”
Read report →“Did you get any technical questions related to the job?”
Read report →Formats, difficulty and experience
Across all 6 Lab49 interview reports.