1. 面试官：介绍一下数据库索引的原理和作用。

2. 面试官：Explain the concept of database index clustering and non-clustering.

3. 面试官：What are the different types of database indexes? Explain each type with an example.

4. 面试官：Discuss the factors to consider when choosing the columns to be indexed in a database table.

5. 面试官：Compare and contrast the performance impact of using indexes on OLTP and OLAP databases.

6. 面试官：Explain the concept of index fragmentation and its impact on database performance. How can it be mitigated?

7. 面试官：What are the best practices for creating and maintaining indexes in a database? Provide examples of scenarios where these best practices are applied.

8. 面试官：Discuss the trade-offs involved in using too many indexes in a database system. How can it be optimized?

9. 面试官：Explain the role of query optimization in maximizing the efficiency of database indexes.

10. 面试官：Designing a database for a high-traffic web application requires a solid understanding of database indexes. Discuss the strategies and considerations for optimizing indexes in this scenario.