First contact by email, then just one round of interview , face-to-face in the Tallinns office, that seemed pleasant and fun and made me more inclined to stay there. Back then, the company (Skype) was not yet bought by Microsoft

Had initial interview with the recruiting agency (CompuCom). They had us go through a brief training class (just a few hours during one day) that helped us prepare for the official interview at Microsoft. Had in-person interview at the QA building for Microsoft. Was asked about past experiences on resume (ex. what was a tough problem you had to overcome, etc.). Was asked how to test a calculator. The pre-interview preparation taught us to ask clarifying questions, and in doing so I learned the calculator was one of those simple dollar-store ones with a solar panel (was told during some interviews the "calculator" ended up being the Windows calculator on computers if you didn't ask any questions). Kept coming up with different ways to test the functionality of the calculator and asking any more questions about it (like who was the target audience for the calculator, etc.) until I was stopped by the interviewer.