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Microsoft 070-516 Exam Syllabus Topics:

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

1. You are developing a new feature in the application to display a list of all bundled products.
You need to write a LINQ query that will return a list of all bundled products. Which query expression should
you use?

A) context.Parts.Cast<Product>() .ToList() .Where(p => p.Descendants.Any(d => d is Product))
B) context.Parts.Cast<Product>() .Where(p => p.Descendants.Any(d => d is Product))
C) context.Parts.OfType<Product>() .ToList() .Where(p => p.Descendants.Any(d => d is Product))
D) context.Parts.OfType<Product>() .Where(p => p.Descendants.Any(d => d is Product))

2. 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 data service to the following URL: http://
contoso.com/Northwind.svc.
You add the following code segment. (Line numbers are included for reference only.)
01 var uri = new Uri(@"http://contoso.com/Northwind.svc/");
02 var ctx = new NorthwindEntities(uri);
03 var categories = from c in ctx.Categories select c;
04 foreach (var category in categories) {
05 PrintCategory(category);
06 ...
07 foreach (var product in category.Products) {
08 ...
09 PrintProduct(product);
10 }
11 }
You need to ensure that the Product data for each Category object is lazy-loaded. What should you do?

A) Add the following code segment at line 06:
var strPrdUri = string.Format("Categories({0})?$expand=Products",
category.CategoryID);
var productUri = new Uri(strPrdUri, UriKind.Relative);
ctx.Execute<Product>(productUri);
B) Add the following code segment at line 08:
var strprdUri= string.format("Products?$filter=CategoryID eq {0}",
category.CategoryID);
var prodcutUri = new Uri(strPrd, UriKind.Relative);
ctx.Execute<Product>(productUri);
C) Add the following code segment at line 06:
ctx.LoadProperty(category, "Products");
D) Add the following code segment at line 08:
ctx.LoadProperty(product, "*");

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application uses the ADO.NET Entity Framework to model entities.
The application allows users to make changes while disconnected from the data store.
Changes are submitted to the data store by using the SubmitChanges method of the DataContext object.
You receive an exception when you call the SubmitChanges method to submit entities that a user has
changed in offline mode.
You need to ensure that entities changed in offline mode can be successfully updated in the data store.
What should you do?

A) Set the DeferredLoadingEnabled property of DataContext to true.
B) Call the SaveChanges method of DataContext with a value of false.
C) Set the ObjectTrackingEnabled property of DataContext to true.
D) Call the SubmitChanges method of DataContext with a value of System.Data.Linq.ConflictMode.ContinueOnConflict.

4. You have a ContosoEntities context object named context and a Color object stored in a variable named color.
You write the following code:
context.Colors.DeleteObject(color); context.SaveChanges();
When the code runs, it generates the following exception:
System.Data.UpdateException: An error occurred while updating the entries. See
the inner exception for detials. --->
System.Data.SqlClient.SqlException: The DELETE satement conflicted with the
REFERENCE constraint "FK_PartColor".
The conflict occurred in database "Contoso", table "dbo.Parts", column
'ColorId'
You need to resolve the exception without negatively impacting the rest of the application. What should you do?

A) In the database, remove the foreign key association between the Parts table and the Colors table, and then update the entity data model.
B) Add code before the call to the DeleteObject() method to examine the collection of Part objects associated with the Color object and then assign null to the Color property for each Part object.
C) Add a transation around the call to the SaveChanges() method and handle the exception by performing a retry.
D) Change the End2 OnDelete proprety of the FK_PartColor association from None to Cascade
E) Change the End1 OnDelete proprety of the FK_PartColor association from None to Cascade

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application.
You use the Entity Framework Designer to create an Entity Data Model (EDM).
You need to create a database creation script for the EDM. What should you do?

A) Use a new Self-Tracking Entities template.
B) Select Run Custom Tool from the solution menu.
C) Run the Generate Database command.
D) Drag entities to Server Explorer.

Solutions: