I applied online and the process took 3 weeks - interviewed at Ocado in August 2013.
Interview Details – First got codility link to solve three programs, that was not tough. Then they asked me to come for Technical Interview. First part was fill in the blanks with basic operations like addition, subtraction, ***. Second part was to fill up blank methods of linked list. After then asked to come for final HR interview (In that also they asked me to write a code for needle in haystack).
I applied through a staffing agency and the process took a day - interviewed at Ocado in July 2012.
Interview Details –
Initially I received a call from an recruitment agency. I took an online programming test on codility. After passing that, I got an offer to attend an interview day. Arrive at least 1 hour before the interview at the Hatfield railway station, because the bus takes 20-25' to get to the square. First we were welcomed by an HR member who took us to the testing room. There, we were handed two tests. We had maximum 45' for each. After completing the tests, a leader of one of the groups came and talk to us about the company, while our tests were getting assessed. After about an hour they came back and I got a negative result, so I left.
The two tests were consisted of a pseudo code made up language and a Java test. The pseudo code one gave you 4 functions and you have to create all the remaining functions using those 4 functions while filling in blanks mostly. If you have any experience with assembly is quite similar but easier. The Java test is a basic linked list implementation where you have to create additional methods by filling in blanks again. Read a bit about linked lists, how to add elements in an unordered & order linked list and to the begin and end of it, how to use recursion to calculate the size etc.
The tests seem to be the same for the last 1-1.5 years because I had friends taking them as well.
Interview Question – Inserting into a Sorted Linked List View Answers (2)
I applied through a recruiter and the process took 4+ weeks - interviewed at Ocado in July 2011.
Interview Details – Initially an online test, then invitation to assessment day. This consisted of two tests, one java and one in a made up language. The successful candidates proceeded to have tour of warehouse, and short interviews. Next invited for second interview, this included technical tests with two interviewers asking whiteboard based questions, and a couple of interviews with managers about personality and circumstances. Received an offer two days after the second interview.
Interview Question – What happens when you type a URL into a browser? Answer Question
Negotiation Details – I asked the recruiter what salary range they would consider, he gave me a range, I said I wanted the top figure of the range, and they came back with that as an offer. Thinking back maybe I could have asked for more.
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