Concurrency · interview question
A bug appears around threads for blocking i/o. What is the strongest first debugging move?
Multiple choiceMediumchapter-15-curatedpremiumconcurrencythreads-for-blocking-i-o
from concurrent.futures import ThreadPoolExecutor
with ThreadPoolExecutor(max_workers=8) as pool:
futures = [pool.submit(call_legacy_system, order_id) for order_id in order_ids]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. Treating threads as either always bad or always enough misses the actual workload tradeoff.
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