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

1. You are designing an n-tier Windows solution that includes a data entry application. The solution uses Microsoft .NET Framework 4 and Microsoft SQL Server 2008.
The data entry application sends customer orders to a middle-tier server. The middle-tier server sends orders to a set of services that perform operations on the orders. Business rules determine which services to call and whether to run them in sequence or in parallel. The business rules are complex and data dependent.
The Windows solution must meet the following requirements:
- Optimize application performance by using dynamic load balancing.
- Allow for business rules to be changed at runtime.
You need to recommend an approach that meets the requirements.
What should you recommend?

A) A Windows Communication Foundation (WCF) service for each operation, with a controller class on the middle-tier server
B) Private message queues with a controller class on the middle-tier server
C) A routed service that uses Windows Communication Foundation (WCF) messaging
D) SQL Server stored procedures

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

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) Remove any limit on batch update sizes. Modify the client application to perform a single update.
B) Disable batch updates. 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.

4. You are designing a Windows Presentation Foundation (WPF) application that will be used to display real-time data from a Microsoft SQL Server 2008 database.
You need to recommend an approach for displaying the datA.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) Use a SqlCacheDependency object in the data layer to query the database when a change is detected.
B) Use a System.Runtime.Caching object in the data layer with a sliding expiration, and query the database when the Cache object expires.
C) Implement OneWay binding between the controls in the WPF application and objects in the data layer.
D) Implement OneWayToSource binding between the controls in the WPF application and objects in the data layer.

5. You are packaging updates for multiple Windows Presentation Foundation (WPF) applications by using Microsoft .NET Framework 4.
Updates to the applications and to third-party control files are available. Updates to the applications have dependencies upon updates to the third-party control files. An update script is run at logon that allows only a single command to be executed.
You need to package the application updates and updates to the third party controls to ensure that they are successfully installed.
What should you do?

A) Package application updates as a single installer. Package third-party control files as a merge module.
B) Package application updates as a single installer. Package third-party control files as a
separate installer.
C) Prepare the installers for individual application updates and include the third-party control files as individual files.
D) Prepare the installers for individual application updates and include the third-party control files as a merge module.

Solutions: