totop.app’s Post

Most Python devs can name the 4 OOP pillars. Few can explain why Python's version of them is different from Java or C++. That gap costs people interviews. Here's what interviewers actually test — and where candidates trip up: Encapsulation — Python has no real private keyword. Double underscore __ triggers name mangling, not true access control. Interviewers love asking why account.__balance raises an error. Inheritance + super() — Most people know what it does. Almost nobody explains when to use it vs. composition. That's the follow-up that separates mid from senior. Multiple Inheritance + MRO — Python resolves method calls using C3 linearization. If you can't explain __mro__ on a Diamond problem, you're leaving senior roles on the table. @classmethod vs @staticmethod — The real question isn't what they are. It's: when would you actually choose one over the other in production code? I've seen engineers with 5+ years of Python stumble on these in live interviews. Not because they don't know Python — but because they've never had to explain it under pressure. That's exactly the gap AI mock interviews are built to close. Have you ever been caught off guard by an OOP question you thought you knew cold? #Python #SoftwareEngineering #TechInterview #ProgrammingInterview #BackendDevelopment

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