Two technical interviews were conducted.

The first was with the team leader and a team member (developer). The second was with the manager and the team leader.

There were two more interviews planned, but as I did not pass the second, I cannot provide details about them.

The first interview was great. The interviewers were very nice and polite, and the questions were informative.

In an unsorted integer array, design a data structure that will help you perform the following operations quickly:

Get(i) - Return the i's element in the array. Set(i) - Update the i's element in the array. Sum(i, j) - Calculate the sum of elements between indexes i and j (inclusive).