I initially applied online and was contacted by HR to complete an online skills assessment test. The test was easy; it was multiple choice and consisted of basic math problems, logic problems, and attention to detail questions. Each question was timed.

I completed this successfully and was scheduled for a phone interview. The interviewer asked about some projects I had done. After I mentioned a few, he created many questions on the spot that related to my projects, such as why a certain issue might cause a problem, what if I had tried an alternative approach, or why a particular method wouldn't make sense. There was barely any feedback, either positive or negative. The interviewer would often ask if I was sure about the answer I had given.

Following the phone interview, I was contacted for a timed technical test on a programming language of my choice. The difficulty of questions on this test varied widely, though many were very high-level and heavy on nitpicky details. I assume this test was primarily used to gauge my level of knowledge of the language.

After completion of the test, I was contacted for an in-house interview.

(Programming Language Test)

When casting an object of a polymorphic class from a base class, which kind of cast executes only if it is valid?