FastAPI · interview question
A bug appears around route handlers. What is the strongest first debugging move?
Multiple choiceEasychapter-13-curatedpremiumfastapiroute-handlers
from fastapi import FastAPI
app = FastAPI()
@app.get("/orders/{order_id}")
def get_order(order_id: str) -> dict[str, str]:
return {"order_id": order_id}Answer and explanation
Correct answer
D. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. If route handlers own all the business logic, testing and refactoring become harder quickly.
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