I got a call to attend the drive which was conducted at there HSR office. The HR provided a question set to get started. You need to code those on paper. My set had 3 questions - two related to DP and one related to Backtracking. They have multiple question set and each had 3 questions, out of which you had to attempt any 2 questions. Once done, they will review your code and then have a face to face discussion, where they will discuss your solution. Then there will be more DS/Algo questions. I was asked questions related to Tree and Graph as well.