I had an initial interview with the recruiting agency, CompuCom. They had us go through a brief training class, which lasted just a few hours on one day, that helped us prepare for the official interview at Microsoft.

I had an in-person interview at the QA building for Microsoft. I was asked about past experiences on my resume (e.g., what was a tough problem you had to overcome?). I was also asked how to test a calculator.

The pre-interview preparation taught us to ask clarifying questions. In doing so, I learned the calculator was one of those simple dollar-store ones with a solar panel. (I was told during some interviews the "calculator" ended up being the Windows calculator on computers if you didn't ask any questions).

I kept coming up with different ways to test the functionality of the calculator and asking more questions about it (like who was the target audience for the calculator, etc.) until I was stopped by the interviewer.

How would you test a calculator?