Technical Skills

Python Developer Test

Assess Python syntax, data structures, functions and common programming patterns.

45 minMedium15 questions15 sections
Python syntaxData structuresFunctionsProgramming patterns
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Topics covered

Async I/OBackground JobsTransactionsPython SemanticsMemoryConcurrencyData AccessFile ProcessingException HandlingLoggingAPI BoundariesRate LimitsTestingImplementationProduction Incident

Sample questions

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Async I/OMid-level

An async API endpoint contains: async def get_customer(customer_id): response = requests.get(f"https://service/customers/{customer_id}") return response.json() Under load, unrelated requests stall. Explain why and redesign it.

Background JobsMid-level

A worker processes an uploaded invoice, writes rows to the database and sends a confirmation email. The queue can deliver the job more than once. Design an idempotent workflow.

TransactionsMid-level

A Python service creates an order, decrements inventory and records payment in three separate commits. Explain the failure modes and redesign the transaction boundaries, including the external payment call.

Python SemanticsMid-level

Review: def add_tag(tag, tags=[]): tags.append(tag) return tags Explain the production bug this can create, fix it and add tests.

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