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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>() .Where(p => p.Descendants.Any(d => d is Product))
B) context.Parts.Cast<Product>() .ToList() .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 develop an application. You use the Entity Framework Designer to create the following Entity Data Model.

You write a method named ValidatePostalCode to validate the postal code for the application.
You need to ensure that the ValidatePostalCode method is called before the PostalCode property set
method is completed and before the underlying value has changed.
Which code segment should you place in the entity's partial class?

A) partial void OnPostalCodeChanging(string value) {
ValidatePostalCode(value);
}
B) partial void OnPostalCodeChanged(string value) {
PostalCode = GetValidValue<string>(value, "ValidatePostalCode", false, true) ;
}
C) public string ValidatedPostalCode
{
set
{
ValidatePostalCode(value);
_PostalCode = value;
}
get
{
return _PostalCode;
}
}
D) public string ValidatedPostalCode
{
set
{
_PostalCode = StructuralObject.SetValidValue("ValidatePostalCode", false);
}
get
{
return _PostalCode;
}
}

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use the ADO.NET Entity Data Model (EDM) to define a Customer entity.
You need to add a new Customer to the data store without setting all the customer's properties. What
should you do?

A) Override the Create method for the Customer object.
B) Call the Create method of the Customer object.
C) Override the SaveChanges method for the Customer object.
D) Call the CreateObject method of the Customer object.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use a TableAdapter object to load a DataTable object.
The DataTable object is used as the data source for a GridView control to display a table of customer
information on a Web page.
You need to ensure that the application meets the following requirements:
-Load only new customer records each time the page refreshes.
-Preserve existing customer records. What should you do?

A) Set the ClearBeforeFill property of the TableAdapter to false. Use the GetData method of the TableAdapter to create a new DataTable.
B) Set the ClearBeforeFill property of the TableAdapter to true. Use the GetData method of the TableAdapter to create a new DataTable.
C) Set the ClearBeforeFill property of the TableAdapter to true. Use the Fill method of the TableAdapter to load additional customers.
D) Set the ClearBeforeFill property of the TableAdapter to false. Use the Fill method of the TableAdapter.

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Windows Forms
application.
You plan to deploy the application to several shared client computers. You write the following code
segment.
(Line numbers are included for reference only.)
01 Configuration config = ConfigurationManager.OpenExeConfiguration
(exeConfigName);
02 ...
03 config.Save();
04 ...
You need to encrypt the connection string stored in the .config file. Which code segment should you insert at line 02?

A) ConnectionStringsSection section = config.GetSection("connectionString") as ConnectionStringsSection; section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
B) ConnectionStringsSection section = config.GetSection("connectionString") as ConnectionStringsSection; section.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");
C) ConnectionStringsSection section = config.GetSection("connectionStrings") as ConnectionStringsSection; section.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");
D) ConnectionStringsSection section = config.GetSection("connectionStrings") as ConnectionStringsSection; section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");

Solutions: