I applied through a referral. Once your resume is in their database, they will call you again and again.

I attended the interviews thrice, and the third time, I finally cleared all rounds.

However, the interview and offer rolling out processes are too slow. I received a verbal offer in April and am still waiting for the official offer to be rolled out.

String, StringBuffer, StringBuilder differences. Can you write your own immutable class and how?

HashMap implementation and hashCode(), equals() methods.

He asked me to write two logical testing programs with reduced complexity (0,1,1,2,4,5,3,3,1,0,1 traverse once only and get the duplicate numbers along with the count).

Printing Pascal's triangle.

Duplicate letters from a string with less complexity.

Reversing words of a string individually (this is a tree -> o/p: siht si a eert).