Cognizant Programmer Analyst Trainee interview questions

Interview process was good but after i got placed and did my internship...they rejected my FTE..and I recieved internship stipend as well... Almost after a year of waiting to join the company they rejected my FTE .. I was offered with several other offer but i opt for Cognizant.. which now i m regretting.

They asked object oriented programming, java, SQL , PL/SQL, Aptitude questions and project related questions like my project was on mern stack so they asked questions like what is mongo db and the workflow of the project.