70-638 MS Office Communications Server 2007, Configuring

Wednesday, October 8, 2008, 10:14
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Recently, Microsoft released exam 70-638 (no official info page yet, but it’s all in Trika’s Blog).

As you might know, i’ve played with OCS 2007 in the past few days, and i’ve got a few leftover exam vouchers anyway. So yesterday, i decided to sign up for 70-638, and do the test this Saturday morning. This was possible because my favorite testing center (Digicomp in Zurich) is now offering Saturday testing.

I didn’t really expect to pass this exam, but i did (with more than 800 points). Okay, so what did happen at this exam?

First, the hard facts:

* 1.5 hours of time (didn’t even need half of that)
* 40 questions
* Only multiple choice questions, no PBT, no drag and drop, no nothing

What did i do to prepare myself for this exam? Not much, really. I’ve deployed OCS 2007 internally in the past few days, and crossread a few deployment guides.

First off, the exam was structured completely different than what i expected after taking the 70-236 Exchange 2007 MCTS. The exam varied widely from installing, to configuring and design. As such, it was a more classical approach, covering all topics of OCS 2007 use.

The questions were well written, and a few of them were more or less exact duplication of content from the available deployment guides, with even the same names and everything.

There also were several design questions, for which you need to understand the general architecture behind OCS 2007 - that isn’t as difficult as it might sound, because OCS 2007 is rather well structured, and the infrastructure design is easy to learn.

No talk about hardware requirements, some questions about upgrading from LCS 2005, etc.

This exam is easy - not as easy as 70-620, but also less difficult than the Exchange 2007 MCTS/MCITP exams.
QUESTION 118:
You use Visual Studio .NET to create a customer database application for Certkiller .

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Your application contains the following code segment. (Line numbers are included
for reference only)
01 foreach(Customer oCustomer in oCompany.Customers){
02 decPostage = CalculatePostage(oCustomer);
03 }
When you debug your application, you discover that the CalculatePostage function
sometimes produces incorrect results. You suspect that a problem in one of the
property values of oCustomer might be causing the error.
oCustomer includes a property named Region that contains the name of the
geographical region where the customer resides. The Customers collection of
oCompany is sorted by region. As quickly as possible, you need to step through
CalculatePostage each time the Region property of oCustomer changes to a new
value.
What should you do?
A. Set a breakpoint on line 1. Step through the code after the breakpoint is reached.
B. Set a breakpoint on line 2. Step through the code after the breakpoint is reached.
C. Set a breakpoint on line 2. Set its Condition property to oCustomer.Region and select
the has changed option.
D. Set a breakpoint on line 1. Set its Condition property to oCustomer.Region and select
the is true option.
E. Set a breakpoint on line 2. Set its Condition property to oCustomer.Region.Changed
and select the is true option.
Answer: C
QUESTION 119:
You develop a kiosk application Certkiller Kiosk that enables users to register for an
e-mail account in your domain. Certkiller Kiosk contains two TextBox controls
named textName and textEmail.
Your application is designed to supply the value of textEmail automatically. When a
user enters a name in the textName, an e-mail address is automatically assigned and
entered in textEmail. The ReadOnly property of textEmail is set to True.
Your database will store each user’s name. It can hold a maximum of 100 characters
for each name. However, the database can hold a maximum of only 34 characters
for each e-mail address. This limitation allows 14 characters for your domain,
@proseware.com, and 20 additional characters for the user’s name.
If a user enters a name longer than 20 characters, the resulting e-mail address will
contain more characters that the database allows.
You cannot many any changes to the database schema.
You enter the following in the Leave event handler of textName:
textEmail.Text = textName.Replace(” “,”.”) ?
“@proseware.com”;
Now you must ensure that the automatic e-mail address is no longer than 34
characters. You want to accomplish this goal by writing the minimum amount of

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code and without affecting other fields in the database.
What should you do?
A. Set the textName.Size property to “1,20″.
B. Set the textEmail.Size property to “1,34″.
C. Set the textName.AutoSize property to True.
D. Set the textEmail.AutoSize property to True.
E. Set the textName.MaxLenght property to 20.
F. Set the textEmail.MaxLenght property to 34.
G. Change the code in textName_Leave to ensure that only the first 20 characters of
textName.Text are used.
H. Use an ErrorProvider control to prompt a revision if a user enters a name longer than
20 characters.
Answer: G
QUESTION 120:
You use Visual Studio .NET to develop a Windows-based application named
Advocate Resource Assistant (ARA): ARA contains a class named Client. The
Client class is defines by the following code segment:
namespace Certkiller .Buslayer {
public class Client {
public string GetPhone(int ClientID) {
// More code goes here.
}
// Other methods goes here.
}
}
The client class is invoked from ARA by using the following code segment:
Client client = new Client();
TxtPhone.Text = client.GetPhone(426089);
When you try to build your project, you receive the following error message: “Type
‘Client’ is not defined”.
What are two possible ways to correct this problem? (Each correct answer presents
a complete solution. Choose two)
A. Fully qualify the Client class with the Certkiller .BusLayer namespace.
B. Fully qualify the Client class with the ARA namespace.
C. Add a using statement for the Certkiller .BusLayer namespace in the ClientForm class.
D. Inherit the Certkiller .BusLayer namespace in the ClientForm class.
Answer: A, C
Explanation:
A: The Client class was defined within the Certkiller .Buslayer namespace. To reference it

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correctly we could use the fully qualified name, using the Certkiller .Buslayer namespace.
C: The using-namespace-directive imports the types contained in a namespace into the
immediately enclosing compilation unit or namespace body, enabling the identifier of
each type to be used without qualification.
Syntax:
using
Reference: C# Language Specification, Using namespace directives
Incorrect Answers
B: The ARA namespace would be of no use. The Client class is defined within the
Fabrikam.Buslayer namespace.
D: Namespaces cannot be inherited.
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