Technical practice
How would you design a scalable, reliable and secure enterprise AI system?
What to coverSuggested preparation: Explain how you would separate components, manage access to data and models, and plan for failures and changing demand. Discuss the trade-offs you would assess before choosing an architecture.
How would you add a RAG capability to a legacy system?
What to coverSuggested preparation: Describe an integration path that preserves existing functionality while connecting retrieval and generation. Explain how you would evaluate answer quality, data access and operational reliability before expanding its use.
How would you evaluate code generation as part of legacy-system modernization?
What to coverSuggested preparation: Explain where generated code might help and where human review remains necessary. Discuss how you would validate correctness, security and maintainability against the existing system.
When would a multi-agent workflow be preferable to a simpler AI workflow?
What to coverSuggested preparation: Compare the potential value of dividing work among agents with the added coordination and reliability costs. Explain how you would test whether the extra complexity improves the outcome.
How would you choose and evaluate an ML, deep-learning or generative-AI approach to an NLP problem?
What to coverSuggested preparation: Explain how task requirements and available data would shape the choice of approach. Discuss evaluation criteria and trade-offs such as quality, latency, cost and maintainability.
How would you design an MLOps or LLMOps pipeline for a cloud-hosted AI product?
What to coverSuggested preparation: Walk through the path from experimentation to deployment, monitoring and updates on a cloud platform. Explain how you would make changes reproducible and detect when a production system needs attention.
How would you structure microservices and APIs around an AI capability?
What to coverSuggested preparation: Describe service boundaries and API contracts that would allow an AI component to evolve without unnecessarily disrupting other systems. Discuss trade-offs in latency, failure handling and versioning.
What would you look for in a hands-on code review of an AI system?
What to coverSuggested preparation: Cover code quality, tests and the implications of changes for reliability and security. Explain how you would give actionable feedback while retaining responsibility for difficult architectural decisions.
How would you move an AI project from experiment to production and then optimize it?
What to coverSuggested preparation: Identify what evidence would justify moving beyond an experiment and what automated testing and CI/CD practices would support release. Discuss how production observations would inform subsequent optimization.
How would you make a build-versus-buy decision for an AI tool or platform?
What to coverSuggested preparation: Compare fit with product goals, integration effort, cost, control and operational risk. Explain what evidence you would bring to product and executive stakeholders when recommending a choice.
Behavioural practice
Tell me about a time you balanced hands-on engineering with leading a team.
What to coverSuggested preparation: Use a real situation, your actions and the result to show how you chose where to contribute technically and where to delegate. Include how your approach supported the team's work rather than creating a bottleneck.
Describe a time you shaped a technical roadmap amid ambiguity.
What to coverSuggested preparation: Give the situation, how you worked with product or business leaders to clarify priorities, and the result. Explain how you handled uncertainty without presenting assumptions as settled facts.
Tell me about a complex project where you had to communicate a material risk.
What to coverSuggested preparation: Describe the situation, the actions you took to explain the risk to technical and non-technical stakeholders, and the result. Show how that communication affected a decision or delivery plan.
Describe a time you had to make a difficult resource or vendor decision.
What to coverSuggested preparation: Set out the budget or capacity constraints, your decision-making actions, and the result. Explain the trade-offs you communicated and how you monitored the decision's impact.
Tell me about a time you helped an engineer grow while strengthening the team.
What to coverSuggested preparation: Use a real situation, your mentoring, onboarding or development actions, and the result. Explain how you balanced individual growth with team needs.