Technical practice
How would you turn a complex business need into a measurable AI or ML solution?
What to coverPreparation suggestion: Explain how you would clarify the decision to support, available data, constraints, and what business value would look like. Distinguish a measurable outcome from a model metric before choosing an approach.
How would you design the architecture and lifecycle plan for an advanced solution?
What to coverPreparation suggestion: Walk through data flow, model or logic components, deployment, monitoring, and maintenance. Explain trade-offs between implementation complexity, scalability, reliability, and reuse.
How would you use Python and SQL to prepare and validate data?
What to coverPreparation suggestion: Describe checks for joins, missing values, duplicates, leakage, and changes in data over time. Explain how you would make transformations testable and repeatable.
How would you choose and evaluate an approach to a predictive, classification, optimization, recommendation, or LLM-based problem?
What to coverPreparation suggestion: Compare approaches relevant to the problem rather than assuming one technique fits all five. Discuss baselines, suitable evaluation measures, validation design, and the consequences of different errors.
What would you do if a model performed well in development but fell short of the business goal?
What to coverPreparation suggestion: Separate data quality, evaluation design, model behavior, and operational constraints as possible causes. Explain how you would test changes and decide whether further tuning is worth the effort.
How would you test and optimize an automation solution's logic?
What to coverPreparation suggestion: Describe tests for expected behavior, edge cases, and failure handling alongside measures of business value. Explain when simpler, more maintainable logic would be preferable to added complexity.
How would you move a model from development into a dependable deployed solution?
What to coverPreparation suggestion: Cover repeatable orchestration, component testing, deployment checks, and a plan for maintaining the solution. Discuss what evidence you would want before treating it as operationally reliable.
How would you investigate declining performance in a deployed AI or ML solution?
What to coverPreparation suggestion: Compare current inputs, outputs, data quality, and evaluation measures with prior behavior to narrow down the cause. Explain how monitoring findings would guide a fix, retraining, or a change to the solution.
When would you create a new technical approach instead of using an established one?
What to coverPreparation suggestion: Identify the limitation of the established method and compare alternatives against quality, reliability, cost, and maintainability. Describe how you would validate a new pattern before broader use.
Behavioural practice
Tell me about a complex solution you led from design through ongoing operation.
What to coverPreparation suggestion: Use a real situation, the decisions and actions you owned, and the result. Clarify how you handled lifecycle planning rather than focusing only on the initial build.
Describe a time you worked with business stakeholders and technical teams to define a practical solution.
What to coverPreparation suggestion: Set out the situation, how you clarified differing needs and translated them into a technical approach, and the result. Be specific about your contribution to the collaboration.
Tell me about a consequential technical trade-off you had to communicate.
What to coverPreparation suggestion: Explain the situation, the alternatives you assessed, how you communicated their implications, and the result. Include what evidence informed your recommendation.
Describe a time a deployed solution needed significant troubleshooting or improvement.
What to coverPreparation suggestion: Give the situation, your diagnostic and corrective actions, and the result. Explain how you checked whether the change restored reliability or value.
Tell me about a time an established technical approach was insufficient.
What to coverPreparation suggestion: Describe the situation, what you changed or developed, and the result. Explain how you validated the approach and documented it for potential reuse.