I applied online. The process took 1 day. I interviewed at PrepForTech (New Delhi) in Jan 2020
Interview
Basic Data Structures and Algorithms problems were asked during the interview. Also, some C++ problems were asked. Puzzles were also asked in the interview. I remember Floyd's algorithm was asked.
Interview questions [1]
Question 1
Find Duplicate in sorted array.
Find maximum and minimum element.
Call by reference, call by value.