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Aporeon

Technical interview practice, from one developer to another.

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Architecture scenarioHard~15 min

How do worker processes, copy-on-write, and preloading affect Python service memory?

Explains per-worker memory and copy-on-write savings without preloading process-unsafe resources.

Architecture scenarioHard~15 min

How do you make Python dependency and container builds reproducible?

Produces a pinned, reviewable Python artifact once and promotes the same image across environments.

Python

Practice drill

Architecture scenarioHard~15 min

How should a FastAPI service handle forwarded headers and a stripped proxy path?

Trusts proxy-derived scheme, host, and client data only from known hops and configures externally visible paths correctly.

Architecture scenarioHard~15 min

How should a Python web worker shut down gracefully during deployment?

Coordinates readiness, signals, request drain, lifespan cleanup, and a bounded termination deadline.

Architecture scenarioHard~15 min

How should FastAPI lifespan manage application resources?

Uses FastAPI lifespan to create and close process-owned resources around request serving.

Architecture scenarioHard~15 min

How would you choose and operate Uvicorn or Gunicorn workers for a Python API?

Treats Python web workers as measured processes with separate memory, lifecycle, and failure boundaries.

Architecture scenarioHard~15 min

How would you design readiness, liveness, and startup checks for a Python service?

Separates process survival, traffic readiness, and slow initialization without turning shared dependency failure into a restart storm.

Debugging scenarioHard~15 min

How would you diagnose memory growth in a Python service?

Separates Python allocation growth from process RSS, native memory, fragmentation, caches, and workload peaks.

Architecture scenarioHard~15 min

How would you load-test a Python API and turn the result into a capacity decision?

Uses representative traffic and tail latency to find the real bottleneck and a safe operating range.

Debugging scenarioHard~15 min

How would you profile a slow Python service without guessing?

Chooses evidence based on whether latency comes from CPU execution, waiting, contention, or an external dependency.

Comparison questionMedium~10 min

What is the difference between WSGI and ASGI for a Python web application?

Distinguishes the synchronous WSGI request contract from ASGI's asynchronous, multi-event application contract.

Architecture scenarioHard~15 min

What would you verify before deploying a Django application to production?

Turns Django's production settings, server, storage, security, and operational dependencies into a repeatable release check.