I was contacted by a recruiter after submitting my resume online. I was told I would have three interviews. The recruiter informed me that the first two interviews with engineers from the team would be technical, and the third would be with the hiring manager.

It was not clear what technical questions would be asked, as the team was very interdisciplinary.

My first interview was with a senior engineer. I thought it went well, and I heard back six days later from the recruiter.

My second interview was with a different senior engineer. It was the most difficult interview I had ever done; I was not sure if I was going to get an offer.

I followed up two weeks later, as I had not heard anything and had an expiring offer from a different company. I received a call two days later with an offer.

When pressurizing a tank using a tube with a valve, how do you control how quickly the tank is filled?

Describe a time during an engineering project where you discovered a problem and did not know what the cause was. How did you figure out the cause? What did you do to remedy the problem?

Resume-specific questions relating to test plans I've created and executed in the past and discuss how I could have tested specific variables differently.

You have a tank that is filled with inert gas. A hole is cut out of the tank, and the gas begins to drain out. What could you change to allow the gas to drain out faster? What is happening to the pressure of the gas at the top of the tank?