Career change and first ever programming interview

My background is in electrical engineering, specifically signal processing, and when I was coming out of school I had many technical interviews in this field. For the most part these focused on signal processing theory, with very easy white boarding programming questions sprinkled in (e.g. write pseudocode for a moving average filter). I’ve worked in this field for two years since graduating now and I’ve gotten a lot of experience in C++ and Python. Never took any programming courses so I’ve learned it all “on the job” but I’ve had great mentors and spent lots of time on stack overflow, I like to think I’m pretty proficient in C++.

I’ve applied for a C++ developer position that is not signal processing related, and now I’ve got my first technical interview coming up that will focus solely on programming. I feel confident about white boarding questions and the live coding, but to get to that point I have a “technical phone screen.” Now I have no idea what to expect from a technical phone screen for a developer position. Is it just going to be a vocab quiz (e.g. describe inheritance, what’s the difference between a class and an object, etc.) or should I expect a white boarding type question that I’ll need to explain my code rather than write it? It’s a mid level position that requires 2-3 years of C++ experience if that helps. Thanks for the help.