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

1. ---
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) Create a local caching solution that periodically checks for Internet connectivity, uses local memory, and batches changes to the WCF Web service.
B) 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.
C) Store data in custom business objects. Serialize data locally by using custom serialization.
D) Store data in DataSet objects. Serialize data locally by using XML serialization.

2. 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 merge 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 event logs on the local computers. Use Windows Error Reporting to view the error information.
D) Write error messages to the SQL Server databases. Synchronize the databases by using transactional replication.

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

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

5. You are designing a Windows Presentation Foundation (WPF) application. The main window of the WPF application includes two panels: panel1and panel2.
The WPF application must meet the following requirements:
- Panel2 must be enabled only after users have entered values into multiple text boxes in panel1. - The background color of panel2 must be set to a specific color based on oneof the text box values in panel1. - The background color of panel2 must be set at the same time the panel is enabled.
You need to recommend an approach for meeting the requirements.
What should you recommend?

A) Use Dependency properties.
B) Use a Command object.
C) Use a MultiDataTrigger object.
D) Use a Data Template object.

Solutions: