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

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

2. ---
You are designing a .NET Framework 4 solution. The solution contains a Windows Presentation Foundation (WPF) application and a Windows Communication Foundation (WCF) Web service.
The WPF application uses the WCF Web service to store data in a Microsoft SQL Server 2008 database.
You have the following requirements:
Ensure that the WPF application functions while users' computers are offline.
Minimize the time spent sending data to the WCF Web service.
Minimize disk space requirements for data storage.
You need to recommend an approach for synchronizing data between the WPF application and the database.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Store data in DataSet objects. Serialize data locally by using XML serialization.
B) Store data in custom business objects. Serialize data locally by using custom serialization.
C) Create a local caching solution that periodically checks for Internet connectivity, uses local memory, and batches changes to the WCF Web service.
D) Create a local caching solution that periodically checks for Internet connectivity and writes directly to the local data store and to the WCF Web service.

3. You are developing an application by using Microsoft .NET Framework 4 and Microsoft
Visual Studio 2010.
The application contains a grid that displays customer data stored in a database table.
Users report that the grid takes a long time to display.
You plan to implement data caching to improve loading time for the grid.
You need to ensure that the cached data expires when the customer data is updated.
What should you do?

A) Use the System.Runtime.Caching.SqlChangeMonitor class.
B) Use the ADO.NET Entity Framework.
C) Use a static variable to store the Grid object.
D) Use the System.WeB.Caching.CacheDependency class.

4. You design a Windows Presentation Foundation (WPF) application that connects to a Microsoft SQL Server 2008 database.
The WPF application becomes unresponsive at times. When the WPF application is running, physical memory usage is between 90 percent and 95 percent.
You need to recommend a tool that will identify the memory usage characteristics of the WPF application.
Which tool should you recommend?

A) Event Tracing for Windows (ETW)
B) Application Center Test (ACT)
C) CLR Profiler
D) SQL Profiler

5. You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You need to ensure that the following requirements are met:
All UI elements are labeled.
All property values are exposed.
Keyboard navigation contains tab stops for all controls.
The application functions on high contrast displays.
Which testing strategy should you recommend?

A) Stress testing
B) Usability testing
C) Stability testing
D) Accessibility testing
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Solutions: