AI & Technical question
Explain the challenges in training LLMs. How will you set up your team to achieve training objectives given the challenges you listed, on time and within budget?
- AI & Technical
- Hard
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What this question tests
Technical fluency on LLM training tradeoffs plus the PM skill of organizing a team against real constraints.
How to approach it
- Name the core challenges: data quality and licensing, compute cost, evaluation difficulty, and alignment effort.
- State which challenge is the biggest constraint given a fixed budget and timeline, e.g. compute cost.
- Propose a team structure: a data-curation pod, a training/infra pod, and an eval/safety pod with clear owners.
- Define milestones, e.g. data pipeline ready by week 4, first training run by week 8.
- Describe how you'd trade off scope, such as a smaller model or fewer training tokens, if behind schedule.
- Note how progress against budget would be tracked at each checkpoint.
What a strong answer includes
- Names concrete challenges: labeled data scarcity, compute cost scaling, hallucination and eval difficulty, alignment effort.
- Ties team structure directly to the named challenges, not a generic org chart.
- Gives a rough milestone cadence rather than an open-ended timeline.
- Mentions using existing benchmarks plus a custom eval set for the target use case.
Common mistakes
- Talking only about model architecture and skipping the team, budget and timeline management ask.
- Giving a vague team structure with no ownership boundaries.
Likely follow-up questions
- How would you decide if a training run failed and needs to be redone?
- What would you cut first if the budget got halved midway?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 1: Foundations: the model and the decisions it forces on you
- Chapter 8: Evals: define good and make the number defensible
- Chapter 6: Agents and agentic architecture