Interviewed for Senior Software Engineer. The interview felt more like a questionnaire than a discussion. The interviewer came across as rude, somewhat bragging about his knowledge.

For example, he gave me a coding question with only input and output provided. While explaining the question, he said, "I expected you to figure out the question, but okay, I'll tell you the question." I tried discussing my approach, and his response was, "I know neither of your approaches will work, but sure, you can give it a try." When the code worked, his reply was, "I didn't want it to be done this way."

It was a very unpleasant experience.

String questions.

Oops concepts.

Remove duplicates from string.

Java garbage collector.

How can you implement your own garbage collector?