Applied online. Received small questionarre a week later with stuff like expected salary, preferred start date, along with a Docusign of a NDA agreement and a programming test. The test was untimed but they said they preferred about a week for a submission. It was necessary to use C or C++. It was made up of 4 different questions covering a bunch of different CS topics. One, for example, was about speeding up the running time of an algorithm provided in an example. The test seemed fair but the last 2 questions were very long winded. The last question was fun to do actually but the second to last question was not exactly clear in what it was doing. I gave that question my absolute best interpretation but had no way of testing if it was correct. Five days later I got an email saying they moved on with no feedback on my submitted results. After submitting the test, I scoured the internet for a solution to that weird question and even paid a math tutor to go over the concept. She was convinced it wasn't possible with the information provided. I probably can't and shouldn't reproduce the question here sadly.