The first interview was a discussion with the hiring manager, my knowledge and a project I worked on etc.

Then there was a test in Codility- 3 question, need to finish in 2 hours. the questions weren't hard.

Then a technical interview with the hiring manager + a team member- the question was a sum of 2 with duplications.

Then a technical interview with movinage average- very hard question.

TwoSum with duplications:

Given an array of integers, return indices of the numbers such that they add up to a specific target.

Given an array- {4,5,7,3,4,6,5} and a number - 8

[0,1,3,4,6]

The hard technical interview was on moving average:

Each sample is (time, value) -> list of samples [(t1,v1),...(tn,vn)]

Our job is to implement moving_avg(data, window_sec).

Data -> list of samples [(t1,v1),...(tn,vn)]

Windows_secs -> size of window in secs

Example input:

data = [(1,2),(2,4),(3,3),(4,2),(6,8),(8,2),(12,1)]

moving_avg(data, 2) returns:

[(1,2),(2,3),(3,3),(4,3),(6,5),(8,5),(12,1)]

moving_avg(data, 3) returns:

[(1,2),(2,3),(3,3),(4,2.75),(6,4.33),(8,5),(12,1)]