5 rounds round 1-apti+c output based questions(easy-medium) round 2-coding(medium level) round 3-low level design(railway reservation system) round 4-Technical interview(dbms,projects based,puzzles,oops,c pointers,string pool,data structures) round 5-HR interview(basic questions like about higher studies,location)

I attended an interview for zoho the first round was an aptitude round and the second round was a coding one. Somehow I passed the aptitude round and entered the coding round but it didn't go as expected. So i got rejected but the questions are pretty solvable.