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Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that uses the ADO.NET Entity Framework to model entities. You create an entity model as shown in the following diagram.

You need to ensure that all Person entities and their associated EmailAddresses are loaded. Which code segment should you use?

A) var people = context.People.Include("EmailAddresses").ToList();
B) var people = context.People.Except(new ObjectQuery<Person>("Person.EmailAddresses", context)).ToList();
C) var people = context.People.Include("Person.EmailAddresses").ToList();
D) var people = context.People.Except(new ObjectQuery<Person>("EmailAddresses", context)).ToList();

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application.
You use the ADO.NET Entity Framework Designer to model entities.
You need to create a Plain Old CLR Object (POCO) class that can be used with the
ObjectContext.CreateObject method to create a proxy.
What should you do?

A) Create a custom data class in which all properties and methods are virtual.
B) Create a custom data class that is sealed.
C) Create a custom data class that is abstract.
D) Create a custom data class that has a Protected constructor that does not have parameters.

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use Plain Old CLR objects (POCO) to model your entities.
The application communicates with a Windows Communication Foundation (WCF) Data Services service.
You need to ensure that entities can be sent to the service as XML. What should you do?

A) Apply the [DataContract(IsReference = true)] attribute to the entities.
B) Apply the virtual keyword to the entity properties.
C) Apply the [Serializable] attribute to the entities.
D) Apply the [DataContract(IsReference = false)] attribute to the entities.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Windows
Communication
Foundation (WCF) Data Services service. You deploy the service to the following URL: http://contoso.com/
Northwind.svc.
You want to query the WCF Data Services service to retrieve a list of customer objects.
You need to ensure that the query meets the following requirements:
-Only customers that match the following filter criteria are retrieved: City="Seattle" AND Level > 200.
-Data is sorted in ascending order by the ContactName and Address properties. Which URL should you use for the query?

A) http://contoso.com/Northwind.svc/Customers?City=Seattle & Level gt 200 & $orderby=ContactName and Address
B) http://contoso.com/Northwind.svc/Customers?$filter=City eq 'Seattle' and Level gt 200 & $orderby=ContactName,Address
C) http://contoso.com/Northwind.svc/Customers?City=Seattle & Level gt 200 & $orderby=ContactName,Address
D) http://contoso.com/Northwind.svc/Customers?$filter=City eq 'Seattle' and Level gt 200 & $orderby=ContactName and Address

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database.
The application uses the ADO.NET LINQ to SQL model to retrieve data from the database.
The application will not modify retrieved data. You need to ensure that all the requested data is retrieved.
You want to achieve this goal using the minimum amount of resources. What should you do?

A) Set ObjectTrackingEnabled to true on the DataContext class.
B) Set DeferredLoadingEnabled to true on the DataContext class.
C) Set DeferredLoadingEnabled to false on the DataContext class.
D) Set ObjectTrackingEnabled to false on the DataContext class.

Solutions: