EF (Education First) interview question

For 5+ years experience No questions were asked on JS or Jquery, Entityframework SQL ------ 1. You have a table and on insertion and deletion of a record you have to store the copy of inserted and deleted record in another table 2. how will you create a clustered index on a table without primary key 3. Triggers 4. What approach will you take to display billions of records without affecting the performance of the application MVC ------- 1. How will you do caching in MVC 2. How will you do fragment caching in MVC (for example if you have a grid in a page and you have to cache only that table) 3. Model wrapper 4. How will you pass more than one model to view 5. Is it necessary to use _layout.cshtml in partial view Web service ------------------ 1. How to Send Unserialized data in webservice C# ---- 1. Can you seal a Virtual method? 2. Anonymous types c sharp 3. Whats the use of typecasting , types of typecasting and difference between tryparse and other types of type casting 4. If you don't know the type of object to be typecasted then what will you do? 5. In which scenario will you use try parse and what will be the output 6. How will you typecast unknown types Questions on WCF and Web Api were also asked.