I applied through a staffing agency. I interviewed at Ocado Group (Hatfield) in Feb 2015
Interview
The process has two phases. In the 1st phase you have two tests, aptitude and java, and if you pass you proceed to the next phase which is the actual interview. The java test is based on Simple Linked List which is quite simple of you are familiar with lists. In the aptitude test, basic functions are given such as increment(x) [x++], assign(x,y) [x=y], zero(x) [x=0] add(x,y) [x=x+y] and you have to implement more complex functions, like decrease(x) [x--]. For someone who haven't solve similar exercises it is quite hard to get good results.
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Other Java Software Engineer Interview Reviews for Ocado Group
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.