### Prompt The reported pair-programming round included several SQL exercises and explicitly evaluated both collaboration and the candidate's use of AI. The exact SQL prompts and tool policy were not preserved, so this question focuses only on the reported working style rather than inventing a schema. Assume an interviewer gives you a SQL task in a shared editor and permits a coding assistant. Explain how you would collaborate with the interviewer and, if useful, use the assistant without outsourcing your reasoning. Your process should cover requirements discovery, query construction, verification, and recovery when either you or the assistant proposes something wrong. ### Constraints & Assumptions - Confirm the actual interview policy before using any external tool; “AI allowed” does not define what may be shared. - Do not send confidential schema, sample data, credentials, or personal data to an unapproved service. - You remain responsible for every line submitted and must be able to explain it. - The goal is a correct, maintainable query and observable collaboration, not maximum prompt volume. ### Clarifying Questions to Ask - Which tools and data may be shared, and must AI use be disclosed in real time? - What SQL dialect and database semantics apply? - What are the row grain, keys, required output, tie behavior, null behavior, and ordering requirements? - Are sample rows or a way to execute tests available? - Is the interviewer evaluating a finished query, the collaboration process, or both? ### Part 1: Establish a Shared Plan Describe how you would restate the task, identify ambiguities, propose a solution shape, and keep the interviewer involved before writing code. #### Hints Narrate decisions that affect correctness. Silence followed by a large generated query gives the interviewer little evidence of your reasoning. #### What This Part Should Cover ```premium-lock What This Part Should Cover ``` ### Part 2: Use or Decline AI Deliberately Explain when an assistant adds value, how narrowly you would prompt it, and how you would protect sensitive information. Also explain when you would avoid it. #### Hints Use assistance for a bounded uncertainty, not as a substitute for understanding the problem. #### What This Part Should Cover ```premium-lock What This Part Should Cover ``` ### Part 3: Verify and Debug Give a concrete validation strategy for a proposed SQL query, including a generated one. Explain how you would respond if the interviewer points out a flaw. #### Hints Derive expected rows independently before running the query. A query returning results is not proof that they are correct. #### What This Part Should Cover ```premium-lock What This Part Should Cover ``` ### What a Strong Answer Covers ```premium-lock What a Strong Answer Covers ``` ### Follow-up Questions 1. What would you do if the interviewer allows AI but cannot clarify the data-retention policy? 2. How would you detect that a join silently multiplied rows? 3. What kinds of SQL mistakes are plausible even when generated syntax is valid? 4. How would your approach change if the assistant became unavailable midway through the round?