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

1. You are designing a Windows Presentation Foundation (WPF) application that accesses a business tier. The business tier is implemented as a Windows Communication Foundation (WCF) service and stores data in a Microsoft SQL Server 2008 database.
The WCF service will be accessed by external applications that do not use the .NET Framework.
You need to recommend an approach for passing data between layers.
What should you recommend?

A) Use custom .NET classes with XML serialization.
B) Use a DataSet object.
C) Use custom .NET classes with binary serialization.
D) Use the DiffGram XML format.

2. You are designing a Windows Forms application that allows users to search a product catalog and place orders.
You have the following requirements:
- Display a progress indicator while the application is searching the catalog. - Ensure that users can cancel search operations.
You need to recommend an approach that meets the requirements.
What should you recommend?

A) Implement the search as a duplex service.
B) Implement the search as a Windows Communication Foundation (WCF) service by using the AsyncPattern property of the OperationContractattribute.
C) Execute the search on the user interface thread. Provide a Cancel button to cancel the search.
D) Use a BackgroundWorker component to perform the search.

3. You are analyzing an application that uses Microsoft .NET Framework 4 and Microsoft SQL Server 2008.
The application is used to maintain an inventory database and is accessed from several remote Windows client applications. The application frequently updates multiple rows in a database table by using a DbDataAdapter object.
Users report that the application runs slowly during peak business hours.
When large number of records are changed by multiple users, you discover the following:
The CPU utilization of the client applications is normal.
The network utilization increases slightly.
The CPU utilization of the database server remains close to the normal average
for a day.
You need to resolve the performance issue.
What should you do?

A) Disable batch updates. Modify the client application to perform a single update.
B) Insert a random time interval between updates.
C) Move the update method calls to a separate BackgroundWorker thread.
D) Remove any limit on batch update sizes. Modify the client application to perform a single update.

4. You are developing an application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You plan to use Microsoft Sync Framework to synchronize the data stored in a local Microsoft SQL Server Compact Edition database with the data stored in a centralized SQL Server 2008 database.
Four columns are added to each table involved in the synchronization process to track changes to the database. You add the following four columns to the database table.

Users report that the synchronization process is not always successful. You need to ensure that the application synchronizes data successfully. What should you do?

A) Option C
B) Option B
C) Option D
D) Option A

5. You are designing an n-tier .NET Framework 4 solution that includes a Windows Presentation Foundation (WPF) application.
You need to recommend an approach for ensuring that the solution can support 5,000 concurrent users.
What should you recommend?

A) Buffer overflow testing
B) Component stress testing
C) Integration testing
D) Stress testing

Solutions: