Your distributed training job hangs or crashes intermittently. How do you debug it?
A 256-GPU job that freezes with no error at 3am is a special kind of pain. The causes come from a short, recurring list. Here is the systematic way to identify which one hit you.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
A 256-GPU job that freezes with no error at 3am is a special kind of pain. The causes come from a short, recurring list. Here is the systematic way to identify which one hit you.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
