There were 4 interviews total, distributed across 3 rounds. The first was a quick phone screen with the recruiter (not technical). This was followed by a first round technical interview, and then the final round. The final round consisted of another technical interview and a Math and Problem-Solving (MAPS) interview.

Phone screen: basic information + behavioral.

Technical 1: Basic analog circuit knowledge.

Technical 2: This one focused on your critical thinking and debugging skills. Also, be prepared to talk about your project experience.

MAPS: You don't need any advanced math for this (high school algebra, geometry, and basic probability is good enough). They're mostly looking for problem-solving skills and the ability to communicate your thought process.