ConveGenius Software Development Engineer interview questions

For the technical Round 1, they asked Basic Questions on Personal Team and Hackathon Projects and most of the part from Resume. Then they shifted to Ask CS Fundamentals like OOPS, DBMS and OS. I cleared the round-1 and entered the next round. For the Technical Round 2, I was Asked a total of 3 DSA Questions 2 Questions were Based on Graphs. (Number of Disconnected Components) (Detect Cycles in Directed and Undirected Graphs) and then they asked me to optimise the code and identify the number of Disconnected Components with no cycle. 1 Question was Based on Stack. (Asteroid Collision) similar to (Robot Collision) Also I was Asked to Make a Database schema which I used in my Project. I cleared the second Technical Round Successfully and the went for the last Round. The Hiring Manager Round Started with Basic Questions Based on DSA and then Specific Questions Based on Backend Software Development. Unfortunately I couldn't perform well in the Hiring manager Round and got a rejection.