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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 create an application.
The application connects to a Microsoft SQL Server database. You load records from the Customers table
into a DataSet object named dataset.
You need to retrieve the value of the City field from the first and last records in the Customers table.
Which code segment should you use?

A) DataTable dt = dataset.Tables["Customers"]; string first = dt.Rows[0]["City"].ToString(); string last = dt.Rows[dt.Rows.Count]["City"].ToString();
B) DataTable dt = dataset.Tables["Customers"]; string first = dt.Rows[0]["City"].ToString(); string last = dt.Rows[dt.Rows.Count - 1]["City"].ToString();
C) DataRelation relationFirst = dataset.Relations[0]; DataRelation relationLast = dataset.Relations[dataset.Relations.Count]; string first = relationFirst.childTable.Columns["City"].ToString(); string last = relationLast.childTable.Columns["City"].ToString();
D) DataRelation relationFirst = dataset.Relations[0]; DataRelation relationLast = dataset.Relations[dataset.Relations.Count - 1]; string first = relationFirst.childTable.Columns["City"].ToString(); string last = relationLast.childTable.Columns["City"].ToString();

2. You are developing an ADO.NET 4.0 application that interacts with a Microsoft SQL Server 2008 server
through the SQL Server Native Client.
You create a trace DLL registry entry and you register all of the trace schemas.
You need to trace the application data access layer. Which control GUID file should you use?

A) ctrl.guid.msdadiag
B) ctrl.guid.adonet
C) ctrl.guid.mdac
D) ctrl.guid.snac10

3. You use Microsoft .NET Framework 4.0 to develop an application that connects to a Microsoft SQL Server
2008 database.
You need to prevent dirty or phantom reads. Which IsolationLevel should you use?

A) ReadCommited
B) Snapshot
C) ReadUncommited
D) Serializable

4. The application populates a DataSet object by using a SqlDataAdapter object.
You use the DataSet object to update the Categories database table in the database. You write the
following code segment.
(Line numbers are included for reference only.)
01 SqlDataAdapter dataAdpater = new SqlDataAdapter("SELECT CategoryID,
CategoryName FROM Categories", connection);
02 SqlCommandBuilder builder = new SqlCommandBuilder(dataAdpater);
03 DataSet ds = new DataSet();
04 dataAdpater.Fill(ds);
05 foreach (DataRow categoryRow in ds.Tables[0].Rows)
06 {
07 if (string.Compare(categoryRow["CategoryName"].ToString(), searchValue,
true) == 0)
08 {
09 ...
10 }
11 }
12 dataAdpater.Update(ds);
You need to remove all the records from the Categories database table that match the value of the
searchValue variable.
Which line of code should you insert at line 09?

A) ds.Tables[0].Rows.Remove(categoryRow);
B) ds.Tables[0].Rows[categoryRow.GetHashCode()].Delete();
C) ds.Tables[0].Rows.RemoveAt(0);
D) categoryRow.Delete();

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application updates several Microsoft SQL Server databases within a single transaction.
You need to ensure that after a resource failure, you can manage unresolved transactions. What should
you do?

A) Call the RecoveryComplete method of the TransactionManager class.
B) Call the EnlistVolatile method of the Transaction class.
C) Call the Reenlist method of the TransactionManager class.
D) Call the EnlistDurable method of the Transaction class.

Solutions: