70-561 Exam

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Exam : Microsoft 70-561
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.
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 (System.Security.SecurityException ex)
{
//Handle all database security related exceptions.
}
B. catch (System.Data.SqlClient.SqlException ex)
{
for (int i = 0; i < ex.Errors.Count; i++){
if (ex.Errors[i].Class.ToString() == "14") {
//Handle all database security related exceptions.
}
else{
//Handle other exceptions
}
}
}
C. catch (System.Data.SqlClient.SqlException ex)
{
for (int i = 0; i < ex.Errors.Count; i++){
if (ex.Errors[i].Number == 14){
//Handle all database security related exceptions.
}
else{
//Handle other exceptions
}
}
}
D. catch (System.Data.SqlClient.SqlException ex)
{
for (int i = 0; i < ex.Errors.Count; i++){
if (ex.Errors[i].Message.Contains("Security")){
//Handle all database security related exceptions.
}
else{
//Handle other exceptions
}
}
}
Answer: B

2. 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.
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(null!=conn)
conn.Close();
// code for the query
}
catch (Exception ex)
{
// handle exception
}
finally
{
if(null==conn)
conn.Open();
}
B. try
{
conn.Close();
// code for the query
}
catch (Exception ex)
{
// handle exception
}
finally
{
if(null!=conn)
conn.Open();
}
C. try
{
conn.Open();
// code for the query
}
catch (Exception ex)
{
// handle exception
}
finally
{
if(null!=conn)
conn.Close();
}
D. try
{
conn.Open();
// code for the query
}
catch (Exception ex)
{
// handle exception
}
finally
{
if(null==conn)
conn.Close();
}
Answer: C

3. 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

4. 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

5. 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.
DbConnection connection = 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.
DbConnection connection = new OleDbConnection(connectionString);
C. Create the connection object in the following manner.
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.Odbc");
DbConnection connection = factory.CreateConnection();
D. Create the connection object in the following manner.
DbProviderFactory factory = DbProviderFactories.GetFactory(databaseProviderName);
DbConnection connection = factory.CreateConnection();
Answer: D