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Frameworks Interview Questions — What Senior Engineers Need to Know

Framework questions in senior interviews are really about understanding the patterns underneath the framework, not the API surface. When an interviewer asks about Spring or dependency injection, they want to know if you understand inversion of control as a principle, not just how to annotate a class.

These 7 questions cover the framework concepts that demonstrate genuine engineering depth: how dependency injection containers work, ORM design trade-offs, middleware pipelines, and the architectural patterns that frameworks implement. Understanding these makes you effective with any framework, not just the one you’ve used most.

All 7 Questions

FastAPI — Async vs SyncHow does FastAPI handle async vs sync endpoints?Django — SignalsWhat are Django signals and when should you use them?Django — select_related vs prefetch_relatedWhat is the difference between select_related and prefetch_related in Django?SQLAlchemy — SessionHow does the SQLAlchemy session work?Django — MiddlewareHow does Django middleware work?FastAPI — PydanticHow does FastAPI use Pydantic for validation?SQLAlchemy — Connection PoolHow does SQLAlchemy's connection pool work?

How to Prepare

Focus on understanding concepts deeply enough to explain them in your own words. For each topic, practice articulating the trade-offs and real-world applications — interviewers care about practical judgment, not textbook definitions.

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