Cognizant Programmer Analyst Trainee interview questions

so at first he asked me the introduction later he focused more on my projects and asked me to explain the working procedure.and later he asked some technical questions on python like diff between list tuple and sets, ai principles and explain them,difference between clustering and classfication,what is ai,difference ai and ml,later he asked to write few codings questions like 1.count a of a specific letter in a string 2.remove duplicates from list and 2 more easy-medium level coding questions later managerial rounds was taken.