70-561VB Exam

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Exam : Microsoft 70-561VB
Title : TS: MS .NET Framework 3.5, ADO.NET Application Development


1. You create an application by using the Microsoft .NET Framework 3.5 and Microsoft ADO.NET. The application connects to a Microsoft SQL Server 2005 database.
The application throws an exception when the SQL Connection object is used.
You need to handle the exception.
Which code segment should you use?
A. Try
If conn IsNot Nothing Then
conn.Close()
' code for the query
End If
Catch ex As Exception
' handle exception
Finally
If conn Is Nothing Then
conn.Open()
End If
End Try
B. Try
' code for the query
conn.Close()
Catch ex As Exception
' handle exception
Finally
If conn IsNot Nothing Then
conn.Open()
End If
End Try
C. Try
' code for the query
conn.Open()
Catch ex As Exception
' handle exception
Finally
If conn IsNot Nothing Then
conn.Close()
End If
End Try
D. Try
' code for the query
conn.Open()
Catch ex As Exception
' handle exception
Finally
If conn Is Nothing Then
conn.Close()
End If
End Try
Answer: C

2. You create an application by using the Microsoft .NET Framework 3.5 and Microsoft ADO.NET. The application connects to a Microsoft SQL Server 2005 database.
You write the following code segment.
Dim queryString As String = "Select Name, Age from dbo.Table_1"
Dim command As New _
SqlCommand(queryString, DirectCast(connection, SqlConnection))
You need to get the value that is contained in the first column of the first row of the result set returned by the query.
Which code segment should you use?
A. Dim value As Object = command.ExecuteScalar()
Dim requiredValue As String = value.ToString()
B. Dim value As Integer = command.ExecuteNonQuery()
Dim requiredValue As String = value.ToString()
C. Dim value As SqlDataReader = _
command.ExecuteReader(CommandBehavior.SingleRow)
Dim requiredValue As String = value(0).ToString()
D. Dim value As SqlDataReader = _
command.ExecuteReader(CommandBehavior.SingleRow)
Dim requiredValue As String = value(1).ToString()
Answer: A

3. You create an application by using the Microsoft .NET Framework 3.5 and Microsoft ADO.NET. The application connects to a Microsoft SQL Server 2005 database.
You write the following code segment. (Line numbers are included for reference only.)
01 Using connection As New SqlConnection(connectionString)
02 Dim cmd As New SqlCommand(queryString, connection)
03 connection.Open()
04
05 While sdrdr.Read()
06 ' use the data in the reader
07 End While
08 End Using
You need to ensure that the memory is used efficiently when retrieving BLOBs from the database.
Which code segment should you insert at line 04?
A. Dim sdrdr As SqlDataReader = _
cmd.ExecuteReader()
B. Dim sdrdr As SqlDataReader = _
cmd.ExecuteReader(CommandBehavior.[Default])
C. Dim sdrdr As SqlDataReader = _
cmd.ExecuteReader(CommandBehavior.SchemaOnly)
D. Dim sdrdr As SqlDataReader = _
cmd.ExecuteReader(CommandBehavior.SequentialAccess)
Answer: D

4. You create an application by using the Microsoft .NET Framework 3.5 and Microsoft ADO.NET.
You need to ensure that the application can connect to any type of database.
What should you do?
A. Set the database driver name in the connection string of the application, and then create the connection object in the following manner.
Dim connection As DbConnection = _
New OdbcConnection(connectionString)
B. Set the database provider name in the connection string of the application, and then create the connection object in the following manner.
Dim connection As DbConnection = _
New OleDbConnection(connectionString)
C. Create the connection object in the following manner.
Dim factory As DbProviderFactory = _
DbProviderFactories.GetFactory("System.Data.Odbc")
Dim connection As DbConnection = _
factory.CreateConnection()
D. Create the connection object in the following manner.
Dim factory As DbProviderFactory = _
DbProviderFactories.GetFactory(databaseProviderName)
Dim connection As DbConnection = factory.CreateConnection()
Answer: D

5. You create an application by using the Microsoft .NET Framework 5 and Microsoft ADO.NET. The application connects to a Microsoft SQL Server 2005 database.
You need to separate the security-related exceptions from the other exceptions for database operations at run time.
Which code segment should you use?
A. Catch ex As System.Security.SecurityException
'Handle all database security related exceptions.
End Try
B. Catch ex As System.Data.SqlClient.SqlException
For i As Integer = 0 To ex.Errors.Count - 1
If ex.Errors(i).[Class].ToString() = "14" Then
'Handle all database security related exceptions.
Else
'Handle other exceptions
End If
Next
End Try
C. Catch ex As System.Data.SqlClient.SqlException
For i As Integer = 0 To ex.Errors.Count - 1
If ex.Errors(i).Number = 14 Then
'Handle all database security related exceptions.
Else
'Handle other exceptions
End If
Next
End Try
D. Catch ex As System.Data.SqlClient.SqlException
For i As Integer = 0 To ex.Errors.Count - 1
If ex.Errors(i).Message.Contains("Security") Then
'Handle all database security related exceptions.
Else
'Handle other exceptions
End If
Next
End Try
Answer: B