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Microsoft UPG:Transition MCPD.NET Frmwrk 3.5 Web Dev to 4 Web Dev Sample Questions:

1. You are planning a deployment process for a set of interrelated Web services.
You need to ensure maximum availability of the Web services in the event of a hardware or software
failure.
Which approach should you recommend?

A) Run each distinct service on a separate physical machine.
B) Run each distinct service on two virtual machines (VMs) hosted on one physical machine.
C) Run each distinct service on a separate virtual machine (VM).
D) Run each distinct service on two separate physical machines.

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application.
The application contains the following code segment. (Line numbers are included for reference only.)
01 class DataAccessLayer
02 {
03 private static string connString;
04
05 ...
06 public static DataTable GetDataTable(string command){
07
08 ...
09 }
10 }
You need to define the connection life cycle of the DataAccessLayer class. You also need to ensure that
the application uses the minimum number of connections to the database.
What should you do?

A) Insert the following code segment at line 04. private SqlConnection conn = new SqlConnection(connString); public void Open(){
conn.Open();
}
public void Close(){
conn.Close();
}
B) Insert the following code segment at line 04. private static SqlConnection conn = new SqlConnection(connString); public static void Open(){
conn.Open();
}
public static void Close(){
conn.Close();
}
C) Insert the following code segment at line 07. using (SqlConnection conn = new SqlConnection(connString)){
conn.Open();
}
D) Replace line 01 with the following code segment.
class DataAccessLayer : IDisposable
Insert the following code segment to line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open(){
conn.Open();
}
public void Dispose(){
conn.Close();
}

3. You are creating a Windows Communication Foundation (WCF) service based on WSHttpBinding. New
audit requirements dictate that callers must be authenticated on every call to ensure that their credentials
have not been revoked.
You need to ensure that the service will not cache the security request token.
What should you do?

A) At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.
B) Apply a ServiceBehavior attribute to the service implementation class with the InstanceContextMode property set to Single.
C) In the message security configuration, change clientCredentialType from IssuedToken to UserName.
D) In the message security configuration, set establishSecurityContext to false.

4. You are designing an ASP.NET 4 Web application that will integrate third-party components.
You need to minimize the security risks of using these components.
Which approach should you recommend?

A) Use the third-party components on a separate server.
B) Use an appropriately permitted AppDomain for each component.
C) Store the components in the global assembly cache.
D) Apply role-based security with declarative checks.

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database. You write the following code segment that
executes two commands against the database within a transaction. (Line numbers are included for
reference only.)
01using (SqlConnection connection = new SqlConnection(cnnStr)) {
02connection.Open();
03SqlTransaction sqlTran = connection.BeginTransaction();
04SqlCommand command = connection.CreateCommand();
05command.Transaction = sqlTran;
06try {
07command.CommandText = "INSERT INTO Production.ScrapReason(Name) VALUES('Wrong size')";
08command.ExecuteNonQuery();
09command.CommandText = "INSERT INTO Production.ScrapReason(Name) VALUES('Wrong color')";
10command.ExecuteNonQuery();
11
12}
You need to log error information if the transaction fails to commit or roll back.
Which code segment should you insert at line 11?

A) catch (Exception ex) { sqlTran.Rollback(); Trace.WriteLine(ex.Message); } finaly { try { sqltran.commit( ); } catch (Exception exRollback) { Trace.WriteLine(excommit.Message); }}
B) sqlTran.Commit(); } catch (Exception ex) { Trace.WriteLine(ex.Message); try {
sqlTran.Rollback();
}
catch (Exception exRollback) {
Trace.WriteLine(exRollback.Message);
} } }
C) catch (Exception ex){ Trace.WriteLine(ex.Message); try{ sqlTran.Rollback(); } catch (Exception exRollback){ Trace.WriteLine(exRollback.Message); }} finaly { sqltran.commit( );}}
D) sqlTran.Commit(); } catch (Exception ex) { sqlTran.Rollback(); Trace.WriteLine(ex.Message); }

Solutions: