Cognizant interview questions

It went good but still got rejected. I was asked about diff between tuple and dictionary. Coding problem only had one problem find duplicate elements in a string. I did not get any feedback as to why i was rejected even though i answered everything correctly.

In person technical interview with panel of 2 members and online HR interview.Questions includes dsa, sql, ai and machine learning. Sql was focused more along eith 2 dsa coding questions were asked. Questions from AI and ML was easy to answer. SQL queris were asked to be written