Expedia · Motivation & Culture Fit
How do you use AI for coding?
TrueInterview
October 7, 2026 · 3 min read
An interviewer might ask how you use AI coding assistants in your ordinary work. Respond to the following:
- Do you use AI to write code on the job? If yes, for what tasks and how often?
- Walk through your usual workflow (e.g., prompting, validating outputs, integrating into PRs, testing).
- What benefits have you seen (productivity, quality, learning, onboarding, etc.)?
- What risks or downsides do you watch for (hallucinations, security/privacy, IP, bias, maintainability, over-reliance)?
- How do you mitigate those risks in practice?
- If you could improve AI coding tools, what would you change (product, process, guardrails, evaluation)? Overview: This question probes a candidate's real-world experience and judgment with AI coding assistants, spanning workflow integration, productivity and quality impact, risk awareness (security, privacy, IP, hallucinations), and mitigation strategies in software engineering. Solution
What a strong response should include
Organize your answer into: (a) where you use it, (b) how you use it safely, (c) impact, (d) limits and mitigations, (e) improvements. Interviewers are generally looking for judgment, engineering rigor, and security awareness—not whether you personally "like AI."
1) Where and when you rely on AI
Give concrete examples that don't expose sensitive information:
- Idea generation / design scaffolding: looking at possible approaches, tradeoffs, and edge cases.
- Boilerplate / repetitive code: DTOs, mappers, basic CRUD, configuration fragments.
- Refactors: renames, function extraction, pattern translation.
- Testing: creating unit-test skeletons and lists of boundary cases.
- Documentation: draft READMEs and sample API calls. Also note the places where you don't use it:
- Security-critical logic, authentication/authorization flows, payment or PII handling, or any area that demands strict correctness unless you can verify it fully.
2) A practical workflow (signals engineering maturity)
A solid workflow looks like this:
- State the objective and constraints (language, performance, style, dependencies, interfaces).
- Request reasoning artifacts: assumptions, edge cases, complexity, failure modes.
- Produce a small, testable slice instead of an entire system at once.
- Check it the way you would review a junior engineer's code:
- Execute tests and add any that are missing.
- Examine correctness, readability, and error handling.
- Assess time/space complexity.
- Test against real inputs, including boundary cases.
- Merge through the standard SDLC: PR, code review, linters, CI, security checks.
- Record decisions: why this approach was chosen and what was verified.
3) Benefits (quantify when possible)
Describe measurable or visible effects:
- Quicker iteration on boilerplate and test code.
- More complete edge-case coverage (when used to brainstorm cases).
- Easier onboarding and learning for unfamiliar libraries.
- Less context-switching (summarizing logs, explaining unfamiliar code). If possible, include a number: "cut test-writing time by ~30%" or "reduced PR cycle time."
4) Downsides / risks (name them explicitly)
Demonstrate that you understand real failure modes:
- Hallucinations / subtle bugs (notably off-by-one errors, concurrency issues, null handling).
- Security/privacy: exposing secrets, PII, or proprietary code to external tools.
- IP/license risk: unclear origin of generated code.
- Maintainability: inconsistent style, over-engineering, hard-to-read abstractions.
- Over-reliance: weaker debugging skills or shallow understanding.
5) How you mitigate them
Specific mitigations are what set strong candidates apart:
- Policy compliance: use only approved tools; keep secrets/PII out of prompts; sanitize inputs.
- Verification-first mindset: tests, property-based tests when suitable, negative tests.
- Security review: dependency checks, SAST, threat modeling for sensitive areas.
- Code ownership: treat AI output as untrusted; you remain accountable.
- Style/consistency: enforce formatter/linter; keep diffs small; refactor for clarity.
- Prompt discipline: supply interfaces and examples; ask for minimal changes.
6) Improvements you would propose (practical and product-minded)
Offer 2–4 concrete improvements:
- Better grounding in repository context with citations: "show me exactly which files/functions informed this output."
- Built-in validation loops: auto-generate tests and run them; flag failing cases.
- Security guardrails: secret detection, PII redaction, policy warnings.
- Deterministic change sets: structured outputs (patch format), smaller diffs, safer refactors.
- Evaluation and observability: quality metrics on suggestions, per-team feedback capture.
Example answer outline (adapt as needed)
"I rely on an approved internal AI assistant mostly for boilerplate, test scaffolding, and brainstorming edge cases. I specify constraints, ask for a minimal solution, and then verify it through unit tests and code review just like any other change. It speeds up repetitive work and improves test coverage, but I stay alert to hallucinations and security—no secrets or PII in prompts, and I avoid auth/payment logic unless I can verify it thoroughly. I would improve tools by adding citations to repository context and integrating automatic test execution so suggestions are validated before they reach a PR."