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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 two
ObjectContext instances named context1 and context2.
You need to persist the changes in both object contexts within a single transaction. Which code segment
should you use?

A) using (TransactionScope scope = new TransactionScope())
{
context1.SaveChanges();
context2.SaveChanges();
}
B) using (TransactionScope scope = new TransactionScope())
{
context1.SaveChanges();
context2.SaveChanges();
scope.Complete();
}
C) using (TransactionScope scope = new TransactionScope()) { using (TransactionScope scope1 = new TransactionScope (TransactionScopeOption.RequireNew))
{
context1.SaveChanges();
scope1.Complete();
}
using (TransactionScope scope2 = new TransactionScope
(TransactionScopeOption.RequireNew))
{
context2.SaveChanges();
scope2.Complete();
}
scope.Complete();
}
D) using (TransactionScope scope = new TransactionScope()) { using (TransactionScope scope1 = new TransactionScope (TransactionScopeOption.RequireNew)) {
context1.SaveChanges();
}
using (TransactionScope scope2 = new TransactionScope
(TransactionScopeOption.RequireNew))
{
context2.SaveChanges();
}
}

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains following XML document.
<feed> <title>Products</title> <entry>
<title>Entry title 1</title>
<author>Author 1</author>
<content>
<properties>
<description>some description</description>
<notes>some notes</notes>
<comments>some comments</comments>
</properties>
</content>
</entry>
...
</feed>
You plan to add localization features to the application. You add the following code segment. (Line numbers are included for reference only.)
01 public IEnumerable <XNode> GetTextNodesForLocalization(XDocument doc) 02 {
03 ...
04 return from n in nodes
05 where n.NodeType = XmlNodeType.Text
06 select n;
07 }
You need to ensure that the GetTextNodeForLocalization method returns all the XML text nodes of the XML
document.
Which code segment should you inser at line 03?

A) IEnumerable <XNode> nodes = doc.DescendantNodes();
B) IEnumerable <XNode> nodes = doc.Descendants();
C) IEnumerable <XNode> nodes = doc.NodesAfterSelf();
D) IEnumerable <XNode> nodes = doc.Nodes();

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 and contains a LINQ to SQL data model.
The data model contains a function named createCustomer that calls a stored procedure.
The stored procedure is also named createCustomer. The createCustomer function has the following
signature.
createCustomer (Guid customerID, String customerName, String address1)
The application contains the following code segment. (Line numbers are included for reference only.)
01 CustomDataContext context = new CustomDataContext(); 02 Guid userID = Guid.NewGuid();
03 String address1 = "1 Main Steet";
04 String name = "Marc";
05 ...
You need to use the createCustomer stored procedure to add a customer to the database. Which code segment should you insert at line 05?

A) context.createCustomer(userID, customer1, address1);
B) context.ExecuteCommand("createCustomer", userID, customer1, address1); Customer customer = new Customer() { ID = userID, Address1 = address1, Name = customer1, };
C) context.ExecuteQuery(typeof(Customer), "createCustomer", customer);
D) context.ExecuteCommand("createCustomer", customer); Customer customer = new Customer() { ID = userID, Address1 = address1, Name = customer1, };

4. A performance issue exists in the application. The following code segment is causing a performance bottleneck:
var colors = context.Parts.GetColors();
You need to improve application performance by reducing the number of database calls. Which code segment should you use?

A) var colors = context.Parts.OfType<Product>().Include ("Product.Color").GetColors();
B) var colors = context.Parts.OfType<Product>().Include("Colors").GetColors();
C) var colors = context.Parts.OfType<Product>().Include ("Parts.Color").GetColors();
D) var colors = context.Parts.OfType<Product>().Include("Color").GetColors();

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 using model-first development.
The database has the following requirements:
-each table must have a datetime column named time_modified
-each table requires a trigger that updates the value of the time_modified column when a row is inserted or updated
You need to ensure that the database script that is created by using the Generate Database From Model
option meets the requirements.
What should you do?

A) Add a new entity named time_modified to the model, and modify each existing entity so that it inherits from the new entity.
B) Create a new T4 template, and set the DDL Generation template to the name of the new template.
C) Add a DateTime property named time_modified to each entity in the model and set the property's StoreGeneratedPattern to Computed.
D) Create a new Windows Workflow Foundation workflow, and set Database Generation Workflow to the name of the new workflow.

Solutions: