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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.
You use the ADO.NET Entity Framework Designer to model entities.
The application includes self-tracking entities as shown in the following diagram.

There is a Person entity names person1 that has TrackChanges turned on.
You need to delete all e-mail addresses that are associated with person1 by using an ObjectContext.
What are two possible code segments that you can use to achieve this goal?
(Each correct answer presents a complete solution. Choose two).

A) person1.EMailAddresses = null; context.SaveChanges();
B) foreach(var email in person1.EMailAddresses){
email.MarkAsDeleted();
}
context.SaveChanges();
C) while(person1.EMailAddresses.Count>0){
person1.EmailAddresses.RemoveAt(0);
}
context.SaveChanges();
D) person1.EMailAddresses = new TrackableCollection<EMailAddress>(); context.SaveChanges();

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server 2008 database.
You need to ensure that the application calls a stored procedure that accepts a table-valued parameter.
You create a SqlParameter object. What should you do next?

A) Set the ParameterDirection of SqlParameter to Output.
B) Set the SqlDbType of SqlParameter to Variant.
C) Set the SqlDbType of SqlParameter to Udt.
D) Set the SqlDbType of SqlParameter to Structured. Set the TypeName of SqlParameter to Udt.

3. 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 following object query to load a product from the database.
(Line numbers are included for reference only.)
01 using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities
())
02 {
03 ObjectQuery <Product> productQuery = advWorksContext.Product.Where
("it.ProductID = 900");
04 ...
05 }
You need to log the command that the query executes against the data source. Which code segment should you insert at line 04?

A) Trace.WriteLine(productQuery.ToTraceString());
B) Trace.WriteLine(productQuery.ToString());
C) Trace.WriteLine(productQuery.CommandText);
D) Trace.WriteLine(((IQueryable)productQuery).Expression);

4. 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. You use Entity SQL to retrieve data from the
database.
You need to enable query plan caching. Which object should you use?

A) EntityConnection
B) EntityCommand
C) EntityDataReader
D) EntityTransaction

5. 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 associate a previously deserialized entity named person1 to an object context named model
and persist changes to the database.
Which code segment should you use?

A) model.People.Attach(person1); model.SaveChanges();
B) model.AttachTo("People", person1); model.SaveChanges();
C) person1.AcceptChanges(); model.SaveChanges();
D) model.People.ApplyChanges(person1) ; model.SaveChanges();

Solutions: