EPAM Systems Intern interview questions

The Interview process was lilt bit tough the interviewer was asking the questions from oops thoroughly and while i was answering he asked me another question then he shifted to the logical he gave me a question on String and asked me to write the logic on paper in 5 min. without using any data structure he was more into the logic i was able to code it but i guess there were some corner cases which i never handled because the time was only 5 min and i had to think for the approach first and then have to write it on paper. I guess he thought maybe i'm not good in logic building but yeah overall it was a great experience for me.