Microsoft 070-516 : TS: Accessing Data with Microsoft .NET Framework 4

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Microsoft 070-516 Exam Syllabus Topics:

Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. The application must provide a component part list for any product. The component part list must give the
quantity of
each distinct part that is required to manufacture that product.
You need to create a LINQ expression that delivers a a result of type IEnumerable<Tuple<int,Part>> to
meet the requirements.
Which expression should you use?

A) IEnumerable<Tuple<int, Part>> result = part.Descendants .GroupBy(p => p) .Select(g => Tuple.Create(g.Count(), g.Key));
B) IEnumerable<Tuple<int, Part>> result = part.Descendants .Distinct() .GroupBy(p => p) .Select(g => Tuple.Create(g.Count(), g.Key));
C) IEnumerable<Tuple<int, Part>> result = part.Children .Distinct() .GroupBy(p => p) .Select(g => Tuple.Create(g.Count(), g.Key));
D) IEnumerable<Tuple<int, Part>> result = part.Descendants .ToDictionary(c => c) .Select(d => Tuple.Create(d.Value.Children.Count(), d.Key));
E) IEnumerable<Tuple<int, Part>> result = part.Children .GroupBy(p => p) .Select(g => Tuple.Create(g.Count(), g.Key));

2. You use Microsoft .NET Framework 4.0 to develop an application that uses Entity Framework. The application includes the following Entity SQL (ESQL) query.
SELECT VALUE product FROM AdventureWorksEntities.Products AS product ORDER BY product.ListPrice
You need to modify the query to support paging of the query results. Which query should you use?

A) SELECT SKIP @skip VALUE product FROM AdventureWorksEntities.Products AS product ORDER BY product.ListPrice LIMIT @limit
B) SELECT VALUE product FROM AdventureWorksEntities.Products AS product ORDER BY product.ListPrice SKIP @skip LIMIT @limit
C) SELECT TOP Stop VALUE product FROM AdventureWorksEntities.Products AS product ORDER BY product.ListPrice SKIP @skip
D) SELECT SKIP @skip TOP Stop VALUE product FROM AdventureWorksEntities.Products AS product ORDER BY product.ListPrice

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 has two DataTable objects that reference the Customers and Orders tables in the
database.
The application contains the following code segment. (Line numbers are included for reference only.)
01 DataSet customerOrders = new DataSet();
02 customerOrders.EnforceConstraints = true;
03 ForeignKeyConstraint ordersFK = new ForeignKeyConstraint("ordersFK",
04 customerOrders.Tables
["Customers"].Columns["CustomerID"],
05 customerOrders.Tables["Orders"].Columns
["CustomerID"]);
06 ...
07 customerOrders.Tables["Orders"].Constraints.Add(ordersFK);
You need to ensure that an exception is thrown when you attempt to delete Customer records that have related Order records.
Which code segment should you insert at line 06?

A) ordersFK.DeleteRule = Rule.None;
B) ordersFK.DeleteRule = Rule.SetDefault;
C) ordersFK.DeleteRule = Rule.Cascade;
D) ordersFK.DeleteRule = Rule.SetNull;

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that connects to a Microsoft SQL Server 2008 database. The application includes a SqlConnection named
conn and a SqlCommand named cmd.
You need to create a transaction so that database changes will be reverted in the event that an exception is
thrown.
Which code segment should you use?

A) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Commit();
}
catch
{
transaction.Rollback();
}
B) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Commit();
}
catch
{
transaction.Dispose();
}
C) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
}
catch
{
transaction.Commit();
}
D) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Rollback();
}
catch
{
transaction.Dispose();
}

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 AdventureWorksEntities context = new AdventureWorksEntities("http://
localhost:1234/AdventureWorks.svc");
02 ...
03 var q = from c in context.Customers
04 where c.City == "London"
05 orderby c.CompanyName
06 select c;
You need to ensure that the application meets the following requirements:
-Compares the current values of unmodified properties with values returned from the data source.
-Marks the property as modified when the properties are not the same. Which code segment should you insert at line 02?

A) context.MergeOption = MergeOption.NoTracking;
B) context.MergeOption = MergeOption.AppendOnly;
C) context.MergeOption = MergeOption.OverwriteChanges;
D) context.MergeOption = MergeOption.PreserveChanges;

Solutions: