A recruiter from Facebook reached out to me after reviewing my profile. We scheduled the first phone screening interview, where the recruiter explained more about the role and the company. They warned me that the technical interviews are usually difficult and require thorough preparation.

I started practicing coding exercises on HackerRank in preparation for my first coding interview, which we scheduled for three weeks after the phone screening.

On the day of the interview, we had some initial technical difficulties in the first five minutes, but we managed to get CoderPad working. The interview was scheduled for 45 minutes. I received two algorithmic questions, which I managed to solve. I copied my solutions out to an IDE and tested them after the interview. I had some syntax errors, given that I was not allowed to run the code during the interview. Unfortunately, I did not get past this stage. There would have been four more stages: two coding, two system design, and one company fit/behavioral.

Implement a function that gets the greatest common divisor of two numbers.