Recently I Gave interview round in nagarro which was around 20 min they ask me questions like

-> polymorpishm and how we achive it ( given correct answer)
-> stack vs queue ( given correct)
-> graph vs tree ( correct )
-> balance binary tree vs binary search tree --> i mixed up balanced bt with complete bt
-> joins , types of join , inner join vs outer most join ( correct almost only outer most join incorrect)
-> DSA implement stack using queue ( correctly explain)
-> reverse LL (correct)
-> frog jump puzzle (correct)
-> acid properties (correct)
-> bfs vs dfs ( correct )
--> example of bfs and dfs ( forget example)

almost i have given all answer correctly in rapid fire type interview , main points is that interviewer who is taking my interview is not paying attention to my words ( while i'm answering always i asked him hello sir are u there ) and lately he reply yes yes .

after interview I asked feedback from him He told me that ya interview was good

after 2 days later HR email me that u where not able to clear interview round ( i was wtf , how ? why ? what i did wrong )