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Microsoft Designing & Developing Web Apps Using MS .NET Frmwk 4 Sample Questions:

1. You are conducting an architectural review of an existing ASP.NET Web application. The Web application uses only full-page postbacks, which degrades its performance. You have the following requirements:
Extend existing controls by using AJAX functionality.
Reduce the size of postbacks without modifying the existing controls. You need to recommend an approach for meeting the requirements. What should you recommend?

A) Create a user control that implements the IExtenderProvider interface.
B) Create a server control derived from the ExtenderControl class.
C) Create a user control that implements the IAsyncActionlnvoker interface.
D) Create a server control derived from the Substitution class.

2. You are designing an exception-handling strategy for an ASP.NET Web Forms application.
The Web application will use Windows authentication. The Web application must meet the following requirements:
Display a user-friendly error message to users.
Display a detailed error message to server administrators.
You need to recommend an approach for handling exceptions.
What should you recommend?

A) In the Application_Error event handler, wrap the exception in an ExternalException exception. Re-throw the exception if the user is not a member of the Administrators group.
B) Add a HandleError attribute to each controller class.
C) In the custom Errors element of the Web.config file, set the mode attribute to remoteOnly.
D) On the assembly, add a SecureRules attribute with the security rule set configured to level 2.

3. An ASP.NET Web application contains a class named Money. The Money class has properties named Value and Currency.
The Locals window of the Microsoft Visual Studio 2010 IDE currently displays the Value and Currency properties only when the Money object is expanded.
You have the following requirements:
Display the Value and Currency property values in the Locals window.
Display the property values without requiring the developer to expand the Money object.
You need to recommend an approach for modifying the Money class to meet the requirements.
What should you do?

A) In the constructor, create a new instance of the LocalsItemDescription class for each of the Value and Currency properties.
B) In the Value and Currency property setters, call the Debug.WriteLine() method.
C) Apply the DebuggerDisplay attribute to the class.
D) Modify the class to inherit from the LocalVariableInfo class. Override the IsPinned property to return true.

4. You are designing a method for collecting information regarding usage of new functionality within an ASP.NET Web application.
You have the following requirements:
You need to design a strategy that meets the requirements.
Which approach should you recommend?

A) Use ASP.NET tracing
B) Use the RequestStartedmethod
C) Use remote debugging
D) Use ASP.NET health monitoring

5. An ASP.NET Web application connects to a Microsoft SQL Server 2008 database. Multiple users access the database. The Web.config file includes a database connection string. The Web application uses Windows authentication and impersonation. Anonymous access is turned off.
You need to recommend an approach for pooling database connections between users.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A) In the connection string, set the Integrated Security parameter to true.
B) Do not explicitly close connections.
C) In the connection string, specify a user name and password.
D) Explicitly close connections.

Solutions:

Question # 1 Answer: B

Question # 2 Answer: C

Question # 3 Answer: C

Question # 4 Answer: D

Question # 5 Answer: A,B