Technical interview questions and drills

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Page 6 of 10

Showing the Python Backend curriculum. Technology tags describe each drill's actual implementation context; shared drills can belong to more than one track.

Architecture scenarioMedium~10 min

How would you organize Django settings across environments?

Organizes Django configuration without duplicating environments or leaking secrets into source code.

In Python Backend

Django

Drills

How would you organize Django settings across environments?

How would you profile a slow Python service without guessing?

How would you shut down an asyncio service gracefully?

How would you test asyncio tasks, cancellation, and cleanup reliably?

How would you verify a webhook signature and prevent replay in a Python API?

Implement an idempotent retryable Celery provider task

Implement an immutable USD money value object in Python

Implement a persisted idempotent FastAPI POST

Implement stable keyset pagination with async SQLAlchemy

Incident response after a bad release

Invalidate cached data safely after writes

In what order does DRF process authentication, permissions, throttling, negotiation, and the handler?

Isolate database integration tests

Keep a growing test suite fast and trustworthy

Monitoring downstream dependencies after release

Monitor queue depth, message age, and consumer lag

Move work from the request thread to a queue

Plan a safe schema migration without downtime

Preserve ordering only where it is actually needed

Prevent a cache stampede on hot keys

Prevent IDOR with resource ownership checks

Prevent overposting and mass assignment

Problem Details vs a custom error response

Protect secrets and tokens in API systems