Applied online while being a university student. I applied in October and heard back in January. The recruiter said we had to schedule an interview ASAP and asked me to provide my availability for the next week, despite the fact the initial email recommended leaving at least two weeks before the interview. Having only three days to prepare was slightly rough.

It was a phone interview with a shared CoderPad. My interviewer jumped right into the technical question without any prior questions, which I think is nice as it gives you more time. The interviewer was friendly and answered all of my questions nicely, although it was a bit hard to understand his accent.

Given a string representing a mathematical expression, compute the result. Allowed characters include =, -, /, *, and an unlimited number of spaces.