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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) 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) Insert a random time interval between updates.
D) Move the update method calls to a separate BackgroundWorker thread.

2. 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 an observable collection of objects.
C) Create typed DataSets.
D) Create persistent-aware objects.

3. You are designing a Windows Presentation Foundation (WPF) client application that requests reports from a Windows Communication Foundation (WCF) Web service.
Users must be able to perform other tasks while the WCF Web service generates the report.
You need to recommend a message exchange pattern for the communication between the WPF application and the WCF Web service.
What are two possible message exchange patterns that will meet the requirements? (Each correct answer presents a complete solution, Choose two.)

A) Duplex
B) Datagram without session
C) Request-Response
D) Datagram with session

4. You are designing a Windows Presentation Foundation (WPF) application that uses .NET Framework 4. The application uses a subset of the functionality provided by a third-party COM component that will be replaced later.
The application developers must have access to only the required subset of functionality.
You need to recommend a solution that meets the requirements.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) In the adapter assembly, use a standard interop reference.
B) Create an adapter assembly that exposes the entire functionality of the COM component.
C) In the adapter assembly, use an embedded interop reference.
D) Create an adapter assembly that exposes the required subset of the COM component functionality.

5. You are modifying an existing Windows Presentation Foundation (WPF) application that uses .NET Framework 4. The WPF application uses a wizard to capture data and insert the data into a database. The database includes one parent table and many child tables.
Inserting captured data in the database locks many database tables and delays application access.
You have the following requirements:
-
Reduce delays when saving datA.
--
Ensure that other application users are not blocked from reading datA. Ensure that captured data is available only after all child tables are updated.
You need to recommend an approach for inserting captured data into the database.
What should you recommend?

A) Insert captured data by using a single transaction as the user completes each wizard page.
B) Insert captured data by using non-transactional operations when the user completes the wizard.
C) Insert all captured data in a single transaction when the user completes the wizard.
D) Insert captured data by using optimistic concurrency as the user completes each wizard page.

Solutions: