One Network Enterprises Interview Questions
& Process

The interview process had 3 rounds. The first round was a technical interview covering core Java and SQL. The second round was also technical, focusing on core Java, SQL, and scenario-based questions. The third round was a managerial round. Specific topics included implementing an immutable class, ClassLoader implementation, differences between HashMap and ConcurrentHashMap, exception handling, finding the minimum salary with SQL, joins, ACID, and CAP theorem. There was also a system design question involving refactoring a given class.

A recruiter reached out to me. First, there was a quick 15-minute phone chat about my background and what languages I know, plus a brief overview of the company. Next up was an online test that was moderately tough, with a couple of questions that were a bit unclear. Then came a technical interview focusing on OOP, making SQL queries, and some problem-solving techniques, which felt pretty straightforward. The fourth round was another technical interview where they drilled down on every language and tech from the job description – that was the hardest part for me. Finally, I met with the hiring manager. It included two simple tech questions and then a longer chat about work styles and past experiences. Everyone was really nice and professional. The test and interviews (except the first call) were about an hour each.

So there are 3 rounds in total. First is usually an online test or a written test. If you are a Java developer, you'll get a Java test. For automation testing, it's a basic Java and Selenium test. The test is pretty straightforward and not too hard. After that, there's a technical interview with the local team. The second round is mostly with a senior technical person, either from the US team or the local team. The third round is basically a chat with the Director, which usually means you've got the job.

For the support kind of project they first took written test on core java, design patterns, find an error, implement your own array list and two questions for sqls. I have scored little bit lower than criteria so they just took my first technical interview after my test. As they need a product support lead along with developer so interviewer only focused on coding part. So you need to practice more on coding if are applying for support role. This is expectation from this company.