The process began with an HR screening round, followed by a CodeSignal DSA round. I scored 1200/1200. However, HR informed me that my CodeSignal results were not sufficient to proceed further.

DSA 1 - The problem asks to determine the final position of a robot after executing a series of "u" (up) and "D" (down) commands. The robot starts at a position and moves one step up for each "u" command and one step down for each "D" command. The goal is to return "u" if the robot ends up above the starting position, "D" if it ends up below, and an empty string if it ends up at the starting position.

DSA 2 / 3 / 4 were related to graph and array.