There are two stages of selection for interview shortlisting.

First, an eLitmus percentile of 98+ is required, followed by a multiple-choice quiz on computer science, data structures, and programming fundamentals.

The latter should not be much of a problem if you are thorough with the basics, though getting a good eLitmus score is the hard part.

The job role included a combination of development and testing.

Design a data structure where insertion, deletion, data access, and getting a random element are all done in O(1), i.e., constant time. (Without using STL or hash tables).

Many coding questions relate to friend functions in C++.