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Microsoft PRO: Design & Develop Wndws Apps Using MS .NET Framework 4 Sample Questions:

1. You are designing a distributed application that will be deployed to 5,000 users worldwide.
Servers on five continents will host the Web services and the Microsoft SQL Server 2008
databases that support the application.
You have the following requirements:
---
Collect information about all errors associated with the application.
Store and view all error information in a centralized location.
Minimize the network bandwidth required for the transfer of error information.
You need to recommend a strategy for reporting error information. Which strategy should you recommend?

A) Write error messages to the SQL Server databases. Synchronize the databases by using transactional replication.
B) Write error messages to the event logs on the local computers. Use Windows Management Instrumentation (WMI) to view the error information.
C) Write error messages to the SQL Server databases. Synchronize the databases by using merge replication.
D) Write error messages to the event logs on the local computers. Use Windows Error Reporting to view the error information.

2. ---
You are reviewing an existing Windows application that uses .NET Framework 4.
When the user clicks a button, the application sequentially processes thousands of image files contained in a directory.
The user interface becomes unresponsive while the application processes the files.
You have the following requirements:
Modify the button's click event.
Increase application throughput by processing multiple image files concurrently.
Ensure that the user interface remains responsive while the application processes
the image files.
You need to recommend an approach for meeting the requirements.
What should you recommend?

A) Iterate over the image files. For each image file, use the Process.Start() method to launch a console application that processes the image file.
B) Use the ThreadPool.QueueUserWorkItem() method to queue up a single work item that uses the Parallel.ForEach () method to process the image files concurrently.
C) Use the Parallel.ForEach() method to process the images concurrently.
D) Iterate over the image files by using the Parallel.ForEach()method. For each image file, start a separate thread that processes the image file, by using the Thread.Start() method.

3. You are designing a Windows Presentation Foundation (WPF) application for your company by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The business layer of the application is implemented by using Windows Communication Foundation (WCF).
You plan to support non-repudiation and data integrity for WCF messages.
You need to design the security strategy for the application.
What should you do?

A) Encrypt the WCF messages by using the Internet Protocol Security (IPSec) protocol.
B) Encrypt the WCF messages by using the Secure Sockets Layer (SSL) protocol.
C) Attach a digital signature to the WCF messages.
D) Implement message-level security by using digital certificates as client computer credentials.

4. You are designing a sales and inventory tracking system by using Microsoft Visual Studio 2010 and Microsoft SQL Server 2008.
The sales, inventory, and shipping tables will reside in different databases on different database servers.
You need to ensure that the tables are updated simultaneously.
What should you do?

A) Use Distributed transactions.
B) Use Microsoft Sync Framework.
C) Use LINQ to SQL.
D) Use the ADO.NET Entity Framework.

5. You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4, Microsoft Visual Studio 2010, and Microsoft SQL Server 2008.
You have designed the application to use the ADO.NET Entity Framework for the Data Access Layer (DAL).
You have designed the user interface (UI) of the application by using the Model-View-ViewModel (M-V-VM) pattern.
The middle tier of the application is designed by using Windows Communication Foundation (WCF).
The database schema changes often. The DAL entity objects are required to be referenced from the middle tier and the ViewModel layer of the UI.
You need to ensure that the DAL entity objects are updated when the database schema changes.
What should you do?

A) Create persistent-ignorant objects.
B) Create persistent-aware objects.
C) Create an observable collection of objects.
D) Create typed DataSets.

Solutions: