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

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 create a DataSet object in the
application.
You add two DataTable objects named App_Products and App_Categories to the DataSet.
You add the following code segment to populate the DataSet object.
(Line numbers are included for reference only.)
01 public void Fill(SqlConnection cnx, DataSet ds)
02 {
03 var cmd = cnx.CreateCommand();
04 cmd.CommandText = "SELECT * FROM dbo.Products; " + "SELECT * FROM
dbo.Categories";
05 var adapter = new SqlDataAdapter(cmd);
06 ...
07 }
You need to ensure that App_Products and App_Categories are populated from the dbo.Products and
dbo.Categories database tables.
Which code segment should you insert at line 06?

A) adapter.Fill(ds, "Products"); adapter.Fill(ds, "Categories");
B) adapter.TableMappings.Add("Products", "App_Products"); adapter.TableMappings.Add("Categories", "App_Categories"); adapter.Fill(ds);
C) adapter.Fill(ds.Tables["App_Products"]); adapter.Fill(ds.Tables["App_Categories"]);
D) adapter.TableMappings.Add("Table", "App_Products"); adapter.TableMappings.Add("Table1", "App_Categories"); adapter.Fill(ds);

3. You use Microsoft .NET Framework 4.0 to develop an application that connects to two separate Microsoft
SQL Server 2008 databases.
The Customers database stores all the customer information, and the Orders database stores all the order
information.
The application includes the following code. (Line numbers are included for reference only.)
01 try
02 {
03 conn.Open();
04 tran = conn.BeginTransaction("Order");
05 SqlCommand cmd = new SqlCommand();
06 cmd.Connection = conn;
07 cmd.Transaction = tran;
08 tran.Save("save1");
09 cmd.CommandText = "INSERT INTO [Cust].dbo.Customer " + "(Name,
PhoneNumber) VALUES ('Paul Jones', " + "'404-555-1212')";
10 cmd.ExecuteNonQuery();
11 tran.Save("save2");
12 cmd.CommandText = "INSERT INTO [Orders].dbo.Order " + "(CustomerID)
VALUES (1234)";
13 cmd.ExecuteNonQuery();
14 tran.Save("save3");
15 cmd.CommandText = "INSERT INTO [Orders].dbo." + "OrderDetail (OrderlD,
ProductNumber) VALUES" + "(5678, 'DC-6721')";
16 cmd.ExecuteNonQuery();
17 tran.Commit();
18 }
19 catch (Exception ex)
20 {
21 ...
22 }
You run the program, and a timeout expired error occurs at line 16. You need to ensure that the customer
information is saved in the database.
If an error occurs while the order is being saved, you must roll back all of the order information and save the
customer information.
Which line of code should you insert at line 21?

A) tran.Rollback();
B) tran.Rollback("save2"); tran.Commit();
C) tran.Rollback(); tran.Commit();
D) tran.Rollback("save2");

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You manually create your own Context class named AdventureWorksDB that inherits from ObjectContext.
You need to use AdventureWorksDB to invoke a stored procedure that is defined in the data source.
Which method should you call?

A) ExecuteFunction
B) ExecuteStoreCommand
C) ExecuteStoreQuery
D) Translate

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. The database includes a table that
contains information about all the employees.
The database table has a field named EmployeeType that identifies whether an employee is a Contractor or
a Permanent employee.
You declare the Employee entity base type. You create a new Association entity named Contractor that
inherits the Employee base type.
You need to ensure that all Contractors are bound to the Contractor class. What should you do?

A) Modify the .edmx file to include the following line of code: <NavigationProperty Name="Type" FromRole="EmployeeType" ToRole="Contractor" />
B) Use the Entity Data Model Designer to set up a referential constraint between the primary key of the Contractor class and EmployeeType.
C) Use the Entity Data Model Designer to set up an association between the Contractor class and EmployeeType.
D) Modify the .edmx file to include the following line of code: <Condition ColumnName="EmployeeType" Value="Contractor" />

Solutions: