Clustered vs Non clustered indexes, SQL Query performance tuning, database design, various SQL functions. Some basic C# questions were asked as well (Task/Thread), IQueryable vs IEnumerable, Dependency Injection and life cycles, among other questions. Angular questions related to Components, Component lifecycle, RxJS, how to pass data between components, Observables, how to reduce bundle size, etc. Nothing too complicated. Additional questions on data structures, design patterns and algorithms were asked as well.