The Islands question (which was called the Submarine question) - you get a matrix of size m x n, with either 0 or x in it. A submarine is a place where one x or more form a shape of a sqaure or a rectangle. For example, these all include only one submarine: 0 x x 0 0 0 0 0 x 0 0 0 0 0 0 x x x x 0 0 x 0 0 x Return the number of submarines in the matrix.
Solve the online task
If you were tasked with optimizing the performance of a database query that's slowing down a key feature in your application, how would you approach diagnosing and resolving the issue?
Something like: you have 1000 litres of fuel and 5 barrels, but you can only fill one at a time per time unit or something (the questions was obviously more challenging than this).
Language specific questions for eg Basic interface Benefits of libraries eg Hadoop Equals vs hashcode What is a database index? Explain the final keyword Test coverage percentage
Why National Grid?
Describe a time when I got out from my comfort zone and the results of it.
You have to organise a knock-out tennis tournament with 115 players. How many matches are they going to play?
What did you do during your internship?
Behavioral: you get an email that some feture is broken and you must decide what to do about it. get a lot of messages at once and need to answer all. very excessive...
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