Infosys System Engineer interview questions

2 rounds 1st was online Aptitude test after clearing the second round will be techno managerial. In short the difficulty level is moderate and you can expect the question on C, C++, Java and some scneraio based questions

Interviewer : What is String Immutability? Me: Explained Interviewer : What is pickling and unpickling?? Me : Sorry Sir, I don’t know. Interviewer : Write a code to demonstrate dynamic method dispatch. Me : Did Interviewer : What is an abstract class and how do you declare abstract method in Python? Me : Told. Interviewer : Can static, private, final methods be overridden? Me : No sir. However overriding static methods won’t give any compile time error but the other 2 will. Interviewer : Good. How are arguments passed by value or by reference? Me : told.