Interview Questions

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31.What are the authentication modes in SQL Server?

- Windows mode and mixed mode (SQL & Windows).


32.Where do you think the users names and passwords will be stored in sql server?
- They get stored in master db in the sysxlogins table.


33.What is log shipping?

Can we do logshipping with SQL Server 7.0 - Logshipping is a new feature of SQL Server 2000. We should have two SQL Server - Enterprise Editions. From Enterprise Manager we can configure the logshipping. In logshipping the transactional log file from one server is automatically updated into the backup database on the other server. If one server fails, the other server will have the same db and we can use this as the DR (disaster recovery) plan.


34.Let us say the SQL Server crashed and you are rebuilding the databases including the master database what procedure to you follow?

- For restoring the master db we have to stop the SQL Server first and then from command line we can type SQLSERVER –m which will basically bring it into the maintenance mode after which we can restore the master db.


35.Let us say master db itself has no backup. Now you have to rebuild the db so what kind of action do you take?

- (I am not sure- but I think we have a command to do it).


36.What is BCP? When do we use it?

- BulkCopy is a tool used to copy huge amount of data from tables and views. But it won’t copy the structures of the same.


37.What should we do to copy the tables, schema and views from one SQL Server to another?

- We have to write some DTS packages for it.


38.What are the different types of joins and what dies each do?


39.What are the four main query statements?

40.What is a sub-query? When would you use one?

41.What is a NOLOCK?

42.What are three SQL keywords used to change or set someone’s permissions?

43.What is the difference between HAVING clause and the WHERE clause?

44.What is referential integrity? What are the advantages of it?

45.What is database normalization?

46.Which command using Query Analyzer will give you the version of SQL server and operating system?

47.Using query analyzer, name 3 ways you can get an accurate count of the number of records in a table?

48.What is the purpose of using COLLATE in a query?

49.What is a trigger?

50.What is one of the first things you would do to increase performance of a query?

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