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What are different types of authentication techniques that are used in connection to connect .NET app with SQL Server?

.NET applications can use two different techniques to authenticate and connect with SQL Server. These techniques are as follows:

The Windows Authentication option

The SQL Server Authentication option

34. Explain the new features in ADO.NET Entity Framework 4.0.

 

ADO.NET Entity Framework 4.0 is introduced in .NET Framework 4.0 and includes the following new features:

Persistence Ignorance - Facilitates you to define your own Plain Old CLR Objects (POCO) which are independent of any specific persistence technology.

Deferred or Lazy Loading - Specifies that related entities can be loaded automatically whenever required. You can enable lazy loading in your application by setting the DeferredLoadingEnabled property to true.

Self-Tracking Entities - Refers to the entities that are able to track their own changes. These changes can be passed across process boundaries and saved to the database.

Model-First Development - Allows you to create your own EDM and then generate relational model (database) from that EDM with matching tables and relations.

Built-in Functions - Enables you to use built-in SQL Server functions directly in your queries.

Model-Defined Functions - Enables you to use the functions that are defined in conceptual schema definition language (CSDL).