Technical practice
How would you improve a prompt for a generative AI solution?
What to coverSuggested preparation: Explain how you would define the task, test prompts against representative cases, and compare output quality. Discuss when prompt changes are insufficient and another approach is needed.
How would you design and troubleshoot a retrieval-augmented generation solution?
What to coverSuggested preparation: Walk through retrieval, use of retrieved context, and checks that an answer is supported by that context. Distinguish retrieval failures from generation failures when diagnosing poor answers.
When would an agentic approach be preferable to a simpler workflow?
What to coverSuggested preparation: Compare the value of multi-step reasoning or enterprise-system integration with added complexity and failure risk. Explain how you would bound and validate an agent’s actions.
How would you evaluate whether an LLM solution is effective?
What to coverSuggested preparation: Connect evaluation criteria to the business requirement and assess performance across representative cases, not just an aggregate score. Explain how results would inform product-roadmap decisions.
How would you assess the quality of a ground-truth dataset?
What to coverSuggested preparation: Address coverage, label consistency, ambiguous cases, and whether the dataset reflects the intended use. Explain how defects in ground truth could mislead LLM evaluation.
What would a validation pipeline check before a generative AI release?
What to coverSuggested preparation: Describe repeatable checks for output quality and regressions using representative test cases. Explain what evidence would justify release or further investigation.
How would you monitor and troubleshoot a generative AI solution in production?
What to coverSuggested preparation: Discuss signals for output quality, failures, and changing usage patterns, alongside a way to investigate concerning results. Distinguish what monitoring can reveal from issues that require human review.
How would you turn a business requirement into a technical delivery plan?
What to coverSuggested preparation: Explain how you would define scope, dependencies, evaluation milestones, and responsibilities across data science, engineering, and product. Address trade-offs when a deadline conflicts with evidence that a solution is not ready.
How could an ontology support an AI application built around a digital twin?
What to coverSuggested preparation: Explain how you would represent real-world entities and relationships and check that the mapping remains meaningful to users. This is a preferred qualification in the posting; discuss it as a possible design approach, not an assumed project.
How would you diagnose slow processing of a large dataset in Spark or PySpark?
What to coverSuggested preparation: Describe how you would locate a bottleneck before changing partitioning, joins, or data movement, then measure the effect. Spark and PySpark appear as preferred experience, so frame this as preparation for that stated topic rather than a required tool choice.
Behavioural practice
Tell me about a time you aligned product, engineering, and business stakeholders on a data science deliverable.
What to coverSuggested preparation: Use situation, action, and result to show how you clarified differing requirements and communicated a decision. Be specific about your contribution and the outcome.
Describe a time you developed a junior data scientist while maintaining delivery progress.
What to coverSuggested preparation: Use situation, action, and result to explain the development need, the support you provided, and what changed. Distinguish mentoring from simply assigning work.
Tell me about a time you had to be both a hands-on practitioner and a people manager.
What to coverSuggested preparation: Use situation, action, and result to show why your direct technical involvement mattered and what you delegated. Explain how you protected the team’s ability to deliver.
Describe a time a fast-moving deadline required a difficult delivery trade-off.
What to coverSuggested preparation: Use situation, action, and result to explain the options, the evidence behind your choice, and how you communicated the risk. Keep the example focused on execution rather than speed alone.
Tell me about a time evaluation results changed your product or technical direction.
What to coverSuggested preparation: Use situation, action, and result to describe what the evidence showed, how you responded with stakeholders, and what followed. This is suggested practice based on the role’s responsibility to use evaluation to guide the roadmap.