Cognizant Software Developer interview questions

1.Explain about ur project? 2.Explai three tier architecture?

Q1. Tell me about yourself. Q2. Some questions on OOPS like what is polymorphism, encapsulation, what is difference between encapsulation and abstraction. Q3. Project Discussion Q4. 3 aptitude problems I guess he was asking from gfg puzzles section. Q5. 2 coding problems very easy first one reverse a string second one was find unique characters in a string. Q6. Some questions on DBMS like Joins, Triggers I was unable to answer some of them then Interviewer himself told me I went little in depth. Q7. What do you know about Cognizant and Why do you want to join Cognizant? Overall experience was good and Interviewer was friendly.