Microsoft Software Engineer - Internship interview questions

2 rounds of coding interview. The 1st round contains 1 leetcode medium 1 leetcode hard. The 2nd round contains 1 leetcode medium. I spent 20 minutes to come up with the solution and write the code. Then we spent 10 minutes on testing and finding the bug in my code caused by some edge cases. Besides, we talked about past experience and internship.