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System Design · interview question

Which option is the safer default when shipping code around choosing the model?

Multiple choiceHardchapter-15-curatedpremiumsystem-designchoosing-the-model
python
def choose_execution_model(io_heavy: bool, cpu_heavy: bool) -> str:
    if io_heavy:
        return "asyncio or threads"
    if cpu_heavy:
        return "processes"
    return "simple synchronous code"
Choose one answer
Answer and explanation

Correct answer

B. Choose the simpler shape that keeps the rule obvious, validated, and easy to observe in logs or tests.

Why

The safest default is usually the one that lowers ambiguity and makes errors easier to diagnose.

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