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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 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().GetName().Name; 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",
"NumberOfNonPooledConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();
C) string instanceName = Assembly.GetEntryAssembly().FullName; 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",
"NumberOfReclaimedConnections", instanceName, true); int leakedConnections = (int)perf.NextValue();

2. You use Microsoft .NET Framework 4.0 to develop an application that uses LINQ to SQL.
The Product entity in the LINQ to SQL model contains a field named Productlmage. The Productlmage field
holds a large amount of binary data.
You need to ensure that the Productlmage field is retrieved from the database only when it is needed by the
application. What should you do?

A) Set the Delay Loaded property on the Productlmage property of the Product entity to True.
B) Set the Update Check property on the Productlmage property of the Product entity to Never.
C) When the context is initialized, specify that the Productlmage property should not be retrieved by using DataLoadOptions
D) Set the Auto-Sync property on the Productlmage property of the Product entity to Never.

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 2008 database. The database includes a table named
dbo.Documents
that contains a column with large binary data. You are creating the Data Access Layer (DAL).
You add the following code segment to query the dbo.Documents table. (Line numbers are included for
reference only.)
01 public void LoadDocuments(DbConnection cnx)
02 {
03 var cmd = cnx.CreateCommand();
04 cmd.CommandText = "SELECT * FROM dbo.Documents";
05 ...
06 cnx.Open();
07 ...
08 ReadDocument(reader);
09 }
You need to ensure that data can be read as a stream. Which code segment should you insert at line 07?

A) var reader = cmd.ExecuteReader(CommandBehavior.KeyInfo);
B) var reader = cmd.ExecuteReader(CommandBehavior.Default);
C) var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly);
D) var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);

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 2008 database.
SQLConnection conn = new SQLConnection(connectionString);
conn.Open();
SqlTransaction tran = db.BeginTransaction(IsolationLevel. ...);
...
You must retrieve not commited records originate from various transactions. Which method should you use?

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

5. 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) Translate
B) ExecuteStoreCommand
C) ExecuteStoreQuery
D) ExecuteFunction

Solutions: