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

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 database. You use the ADO.NET LINQ to Entity model
to retrieve data from the database.
You need to call a function that is defined in the conceptual model from within the LINQ to Entities queries.
You create a common language runtime (CLR) method that maps to the function. What should you do
next?

A) Declare the method as abstract.
B) Apply the EdmComplexTypeAttribute attribute to the method.
C) Declare the method as static.
D) Apply the EdmFunctionAttribute attribute to the method.

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses LINQ to SQL.
You create a data model name AdvWorksDataContext, and you add the Product table to the data model.
The Product table contains a decimal column named ListPrice and a string column named Color.
You need to update ListPrice column where the product color is Black or Red. Which code segment should
you use?

A) AdvWorksDataContext dc = new AdvWorksDataContext("...");
var prod = from p in dc.Products
where p.Color == "Black, Red"
select p;
foreach(var product in prod){
product.ListPrice = product.StandardCost * 1.5M;
}
dc.SubmitChanges();
B) AdvWorksDataContext dc = new AdvWorksDataContext("..."); var prod = from p in dc.Products
select p;
var list = prod.ToList();
foreach(Product product in list){
if((product.Color == "Black) && (product.Color == "Red")){
product.ListPrice = product.StandardCost * 1.5M;
}
}
dc.SubmitChanges();
C) string[] colorList = new string[] {"Black", "Red"}; AdvWorksDataContext dc = new AdvWorksDataContext(); var prod = from p in dc.Products
where colorList.Contains(p.Color)
select p;
foreach(var product in prod){
product.ListPrice = product.StandardCost * 1.5M;
}
dc.SubmitChanges();
D) AdvWorksDataContext dc = new AdvWorksDataContext("..."); var prod = from p in dc.Products
select p;
var list = prod.ToList();
foreach(Product product in list){
if(product.Color == "Black, Red"){
product.ListPrice = product.StandardCost * 1.5M;
}
}
dc.SubmitChanges();

4. 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 ensure that the entities are self-tracking. What should you do in the ADO.NET Entity
Framework Designer?

A) Change the Code Generation Strategy option from Default to None.
B) Add an ADO.NET Self-Tracking Entity Generator to the model.
C) Add an ADO.NET EntityObject Generator to the model.
D) Change the Transform Related Text Templates On Save option to False.

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. You use the ADO.NET Entity Framework to model entities. You write the following code segment. (Line numbers are included for reference only.)
01 public partial class SalesOrderDetail : EntityObject
02 {
03 partial void OnOrderQtyChanging(short value)
04 {
05 ...
06 {
07 ...
08 }
09 }
10 }
You need to find out whether the object has a valid ObjectStateEntry instance. Which code segment should you insert at line 05?

A) if (this.EntityState != EntityState.Detached)
B) if (this.EntityState != EntityState.Modified)
C) if (this.EntityState != EntityState.Added)
D) if (this.EntityState != EntityState.Unchanged)

Solutions: