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Member of Technical Staff Software Engineer Interview Questions


Member of technical staff software engineer interview questions shared by candidates

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How many race heats are needed to find the 3 fastest pinewood derby cars out of a field of 8, if only 4 cars can run at a time (assuming that every car will always run the way/speed and each lane is exactly equivalent)?

7 Answers

Each heat rules out 1 car (that cannot be one of the 3 fastest).

so is the answer 4 heat 1 (first 4 car) + 1 (4 second set) + 1( Top 2 from first + Top 2 from second set) + 1 (3 car heat among the 3rd placed car)

Only two races of four cars in each. Get the times of all cars and sort them. You don't need any more races because the times will be the same in subsequent races. :)

Given a series of strings, find the biggest common prefix.

4 Answers

1) How does an ISR work (All the way from the beginning to the end) 2) Data structures and approaches such as when to use a hash table, tree, list, etc. on a conceptual level

1 Answer

What do you know about concurrency? Describe in minute detail

1 Answer

How will you develop a ReadWriteConcurrentLock?

1 Answer

What do you know about websockets, long polling, short polling etc.?

1 Answer

Nothing unexpected, just a question about cloning a linked list with an arbitrary pointer and to find an element in a matrix with elements sorted along the columns and rows.

find the sum of 3 integers in an array that is closest to the target value.

1 Answer

1) Create binary tree from pre order and in order traversals 2) A question regarding dependency management (It was big use case description) which could be solved by two stacks 3) Graph traversal 4) Linked List node reversal of alternative node 1->2->3->4->5->6 would become 2->1->4->3->6->5

They asked coding questions as well as some design questions which we discussed as I coded it up on the white board. Lots of focus around distributed systems and thread synchronization scenarios. I had some good discussions with everyone I talked to, which made it overall a fun experience.