Directi Senior Software Engineer interview questions

Directi has a long interview process for developers. There is an initial phone screen where you will be asked questions about stuff you have mentioned on your resume, going into quite a bit of detail. You may also be asked questions related to the technology required for the position you're interviewing for. If you pass the telephonic interview, the personal interview lasts almost a whole day. You may be asked to write code on a whiteboard, discuss projects in detail and also pair program with one of their developers on a programming problem.

I must state first I did not complete the interview process. So I was not offered a job but was pushed to next round which I declined. The phone screen was 2 hour long and included technical, analytical and coding questions. The interview was scheduled only on thursday evenings so if a particular date was not good, you had to wait 1 whole week to get to the next round. That part was frustrating. The HR sent links to companies web site but did not give any phone introduction of the job position or what role were they looking to fit me into. I was also sent a link to the companies programming contest site and asked to pick any of the hard/hardest problem categories and code it. Unfortunately there were only 2 problems I could choose from and one of them was a NP complete problem. The coding and tests took me 3 nights to complete since I was still in my day job. Here itself I was a bit interested since I like a companys focus on programming basics. But knowing NP complete solutions is a bit much. The phone screen involved questions on algo, data structures and programming. It began with a big discussion on past experience. - Nth fibonacci number -- iterative - Find least common ancestor in a tree with back links to parents - Speed, distance analytical question - Java reference basics - Java string basics - Argue why you need interfaces - Multi threaded synchronization in java The questions although on the basics were involved and went into details. It took a little more than 2 hrs to get through.