I applied through a staffing agency. I interviewed at Ocado Group (Hatfield, East of England, England) in Aug 2014
Interview
Passed initial screen and was called to assessment center. At first stage you need to complete 2 tests. The first test is logical test which is similar to assembly language coding which required to be done in an hour. These questions are quite tricky if you have no experience in writing assembly language codes. The second test is to fill in the missing methods for a linked list class which is easy.
Interview questions [1]
Question 1
The logical test is tricky, but I think as long as you have found out the techniques, it should be straight forward.
I applied online. I interviewed at Ocado Group (Kraków)
Interview
I don't remember every aspect of that interview well, but I know there were a few deep-level questions about how data structures work. Interview was conducted by two devs. It seemed formal and the atmosphere was rough.
Interview questions [1]
Question 1
Why array elements are instant access when you know their index?
The first stage was quite a hard test task. Then I was invited to the second stage for an interview which did not go well for me. The conversation was conducted in a friendly atmosphere
Reached out by hr and scheduled first round. Everyone I met are very friendly but their interview is not typical and the algorithm question I got is a bit tricky.
So the first round has two parts. First part they ask some java, oop, design and db related questions. They cover quite a lot topics. This requires some time to prepare if you want to cover everything. Just from a candidate point of view, I feel it’s not worth to spend time preparing so much for one single company in a hunting season because you probably won’t be asked elsewhere. Second part is a algorithm question but a tricky one. I don’t remember exactly but it’s like you have the answer immediately after you understand the questions, but you tends to overthink because of the context.