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Microsoft 70-516 Exam Syllabus Topics:

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 create an application.
The application uses the ADO.NET Entity Framework to model entities.
The application allows users to make changes to entities while disconnected from the central data store.
You need to ensure that when the user connects to the central data store and retrieves new data, the application meets the following requirements:
-Changes made to the local data store in disconnected mode are preserved.
-Entities that have already been loaded into the local data store, but have not been modified by the user,
are updated with the latest data. What should you do?

A) Call the query's Execute method by using the MergeOptions.AppendOnly option.
B) Call the query's Execute method by using the MergeOptions.OverwriteChanges option.
C) Call the Refresh method of ObjectContext by using the RefreshMode.StoreWins option.
D) Call the Refresh method of ObjectContext by using the RefreshMode.ClientWins option.

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. The application uses the ADO.NET Entity
Framework to model entities.
The database includes objects based on the exhibit.
The application includes the following code segment. (Line numbers are included for reference only.)
01 using (AdventureWorksEntities context = new AdventureWorksEntities()){
02 ...
03 foreach (SalesOrderHeader order in customer.SalesOrderHeader){
04 Console.WriteLine(String.Format("Order: {0} ",
order.SalesOrderNumber));
05 foreach (SalesOrderDetail item in order.SalesOrderDetail){
06 Console.WriteLine(String.Format("Quantity: {0} ", item.Quantity));
07 Console.WriteLine(String.Format("Product: {0} ",
item.Product.Name));
08 }
09 }
10 }
You want to list all the orders for a specified customer. You need to ensure that the list contains the following fields:
-Order number
-Quantity of products
-Product name
Which code segment should you insert at line 02?

A) Contact customer = (from contact in context.Contact
include("SalesOrderHeader") select conatct).FirstOrDefault();
B) Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("customerId", customerId)).First();
C) context.ContextOptions.LazyLoadingEnabled = true;
Contact customer = (from contact in context.Contact
include("SalesOrderHeader.SalesOrderDetail")
select conatct).FirstOrDefault();
D) Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("@customerId", customerId)).First();

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains the following code segment. (Line numbers are included for reference only.)
01 class DataAccessLayer
02 {
03 private static string connString;
04 ...
05 ...
06 public static DataTable GetDataTable(string command){
07 ...
08 ...
09 }
10 }
You need to define the connection life cycle of the DataAccessLayer class.
You also need to ensure that the application uses the minimum number of connections to the database.
What should you do?

A) Insert the following code segment at line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open()
{
conn.Open();
}
public void Close()
{
conn.Close();
}
B) Insert the following code segment at line 04.
private static SqlConnection conn = new SqlConnection(connString);
public static void Open()
{
conn.Open();
}
public static void Close()
{
conn.Close();
}
C) Insert the following code segment at line 07:
using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open();
}
D) Replace line 01 with the following code segment.
class DataAccessLayer : IDisposable
Insert the following code segment to line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open()
{
conn.Open();
}
public void Dispose()
{
conn.Close();
}

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses LINQ to SQL.
The application contains the following model.

Each region contains a single vendor. Customers order parts from the vendor that is located in their region.
You need to ensure that each row in the Customer table references the appropriate row from the Vendor
table.
Which code segment should you use?

A) SalesDataContext dc = new SalesDataContext("...");
var query = from c in dc.Customers
join v in dc.Vendors on c.VendorlD equals v.VendorID
select new { Customer = c, Vendor = v };
foreach (var u in query){
u.Vendor.Region = u.Customer.Region;
}
dc.SubmitChanges();
B) SalesDataContext dc = new SalesDataContext("...");
var query = from c in dc.Customers
join v in dc.Vendors on c.Region equals v.Region
select new { Customer = c. Vendor = v };
foreach (var u in query){
u.Vendor.VendorlD = u.Customer.VendorID;
}
dc.SubmitChanges();
C) SalesDataContext dc = new SalesDataContext("...");
var query = from v in dc.Vendors
join c in dc.Customers on v.Region equals c.Region
select new { Vendor = v, Customer = c };
foreach (var u in query){
u.Customer.VendorlD = u.Vendor.VendorlD;
}
dc.SubmitChanges();
D) SalesDataContext dc = new SalesDataContext("...");
var query = from v in dc.Vendors
join c in dc.Customers on v.VendorlD equals c.VendorID
select new { Vendor = v, Customer = c };
foreach (var u in query){
u.Customer.Region = u.Vendor.Region;
}
dc.SubmitChanges();

5. You are a tasked with performing a code review. The business rule is the following:
-If INSERTs into the first table succeed, then INSERT into the second table.
-However, if the INSERTs into the second table fail, roll back the inserts in the second table but do not roll back the inserts in the first table.
-Although this can also be done by way of regular transactions, It needs to be performed using
TransactionScope objects.
Whis code would fit this business rule?

A) try
{ using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption.Required)) {
...
}
using (TransactionScope scope2 = new TransactionScope(TransactionScopeOption.RequiresNew)) { .... } }
B) try
{ using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption.Required)) {
....
try
{
.....
using (TransactionScope scope2 = new TransactionScope
(TransactionScopeOption.RequiresNew))
{ .... }
}
}
}
C) try
{ using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption.Required)) {
...
using (TransactionScope scope2 = new TransactionScope(TransactionScopeOption.RequiresNew))
{ .... }
......
}
}
D) try
{
using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption)
{
....
try
{
.....
using (TransactionScope scope2 = new TransactionScope(TransactionScopeOption))
{ .... }
}
}
}

Solutions: