An online coding skills test with 3 questions took 80 minutes.

Then there was an HR interview, a conversation with a recruiter for 30 minutes or so, covering a few topics about myself and the company.

Explain recursion like I'm 5.

Why do you want to work for Microsoft?

Talk about a project of yours.

How do you debug your code?

What recent news have you heard about Microsoft?

Tell me of a time where you had a conflict with someone you worked with.

What is the difference between good code and great code?

There are 9 identical rocks except for one which is a little heavier. You have a balance scale at your disposal. How do you figure out which rock is heaviest using the scale only twice?