First they have conducted a coding exam in hackerrank plat form, which consisted of three codes, i have selected for the next round even i have done only 2 questions, and the level of coding questions are easy, medium, hard. After the exam i had two technical cal rounds, where in the both rounds they asked for the complete clear explanation of the project, after that they asked few coding questions, among them 3 were easy and the one was difficult, which is based on recursion and back tracking, i have solved all of them but i was unable to tell the optimal approach for this hard question, after that they haven’t selected me for the next hr round.