1. Short call from HR.

2. Two-hour Zoom interview with two team members. One and a half hours focused on questions about my background and experience (challenges, successful outcomes, interesting bugs I found that I caused and didn't cause, technologies I liked using and why, why one database I used was better than another...). The other half hour was about the company, teams, and the role.

At any stage of the interview, no one could clearly tell me what the role included (I understood later it's because they had several new positions with different requirements, but they weren't sure exactly what was required for each role). The interviewers were very nice and pleasant.

1. One-hour in-office interview with the group leader. Fifteen minutes were questions about my experience and showing me the products and some of the features. Then, 45 minutes of a short coding task. The interview felt unorganized and unplanned.

You have three lambda functions saved to parameters – a, b, and c – that all require an argument to perform a simple mathematical calculation and return the result. How can you execute them all so that the output of one becomes the input of the other in a single call?