The interview process involved:

• A preliminary discussion with HR (cold call).
• Two interviews: one with HR and a technical interviewer, and another with a technical interviewer.

I liked the interview process. It wasn't solely a Q&A style; it was a discussion around various topics. I appreciate this format because it offered the liberty to showcase my strengths while also being challenged to think on the spot. In areas where I lacked significant experience, I disclosed this beforehand. I was pleasantly surprised that they rephrased questions into more familiar terms, such as explaining database isolation levels through locking schemes in a predetermined scenario.

Implement a stack that also has a GetMin method. All operations on the stack, including GetMin, must be O(1).