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Microsoft 070-516 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 a Windows Forms
application.
The application connects to a Microsoft SQL Server database.
You need to find out whether the application is explicitly closing or disposing SQL connections. Which code
segment should you use?

A) string instanceName = Assembly.GetEntryAssembly().FullName; PerformanceCounter perf = new PerformanceCounter( ".NET Data Provider for SqlServer",
"NumberOfReclaimedConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();
B) string instanceName = Assembly.GetEntryAssembly().GetName().Name; PerformanceCounter perf = new PerformanceCounter( ".NET Data Provider for SqlServer",
"NumberOfReclaimedConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();
C) string instanceName = Assembly.GetEntryAssembly().GetName().Name; PerformanceCounter perf = new PerformanceCounter( ".NET Data Provider for SqlServer",
"NumberOfNonPooledConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();
D) string instanceName = Assembly.GetEntryAssembly().FullName; PerformanceCounter perf = new PerformanceCounter( ".NET Data Provider for SqlServer",
"NumberOfNonPooledConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();

2. The database contains orphaned Color records that are no longer connected to Part records.
You need to clean up the orphaned records. You have an existing ContosoEntities context object named
context.
Which code segment should you use?

A) context.Colors.ToList().RemoveAll(c => !c.Parts.Any()); context.SaveChanges();
B) var unusedColors = context.Colors.Where(c => !c.Parts.Any()); context.DeleteObject(unusedColors); context.SaveChanges();
C) context.Colors.TakeWhile(c => !c.Parts.Any()); context.SaveChanges();
D) var unusedColors = context.Colors.Where(c => !c.Parts.Any()).ToList(); foreach (var unused in unusedColors){
context.DeleteObject(unused)
}
context.SaveChanges();

3. You use Microsoft .NET Framework 4.0 and the Entity Framework to develop an application.
You create an Entity Data Model that has an entity named Customer. You set the optimistic concurrency
option for Customer.
You load and modify an instance of Customer named loadedCustomer, which is attached to an
ObjectContext named context.
You need to ensure that if a concurrency conflict occurs during a save, the application will load up-to-date
values from
the database while preserving local changes. Which code segment should you use?

A) try {
context.SaveChanges();
}
catch(EntitySqlException ex)
{
context.Refresh(RefreshMode.StoreWins, loadedCustomer);
}
B) try {
context.SaveChanges();
}
catch(OptimisticConcurrencyException ex)
{
context.Refresh(RefreshMode.StoreWins, loadedCustomer);
}
C) try {
context.SaveChanges();
}
catch(OptimisticConcurrencyException ex)
{
context.Refresh(RefreshMode.ClientWins, loadedCustomer);
}
D) try {
context.SaveChanges();
}
catch(EntitySqlException ex)
{
context.Refresh(RefreshMode.ClientWins, loadedCustomer);
}

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 the following SQL statement to retrieve an instance of a DataSet object named ds:
SELECT CustomerID, CompanyName, ContactName, Address, City FROM dbo.Customers
You need to query the DataSet object to retrieve only the rows where the ContactName field is not NULL. Which code segment should you use?

A) from row in ds.Tables[0].AsEnumerable() where row.Field<string>("ContactName") != null select row;
B) from row in ds.Tables[0].AsEnumerable() where !Convert.IsDBNull(row.Field<string>("ContactName")) select row;
C) from row in ds.Tables[0].AsEnumerable() where (string)row["ContactName"] != null select row;
D) from row in ds.Tables[0].AsEnumerable() where !row.IsNull((string)row["ContactName"]) select row;

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

Solutions: