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Lesson Review
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You can use the following questions to test your knowledge of the information in Lesson 3, Creating and Consuming WCF Services. The questions are also available on the companion CD as a practice test, if you prefer to review them in electronic form.
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Note
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AnsWERs
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Answers to these questions and explanations of why each answer choice is correct or incorrect are located in the Answers section at the end of the book.
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You want to write a WCF service application. You intend to host the service in IIS and use ASP.NET to build the service. What type of project should you create
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A. A WCF Service library B. A WCF service application c. An ASP.NET Web Service application D. A Windows Service application
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Lesson 3: Creating and Consuming WCF Services
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ChAPTER 10
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You define your own custom type to be used with your WCF service. This type represents a product at your company. It contains several public properties. You want to expose this type so that it can be serialized and defined by an XML Schema Definition (XSD) schema. What actions should you take (Choose all that apply.)
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A. Mark your product class with the DataContract attribute. B. Mark your product class with the ServiceContract attribute. c. Mark the public members of your product class with the OperationContract attribute. D. Mark the public members of your product class with the DataMember attribute.
3. 4.
You want to expose a portion of your data model as a service by using OData. Which actions should you take (Choose all that apply.)
A. Create a service class that inherits from DataService. B. Create a service class that inherits from DataContract. c. Indicate what the service should expose inside the InitializeService method. D. Indicate what the service should expose inside the Init method.
You want to write a client to work with a WCF Data Service. Which actions should you take (Choose all that apply.)
A. Set a web reference to the data service. B. Set a service reference to the data service. c. Create an instance of the data service proxy and pass a URI object to point to the
data service.
D. Use the classes in System.Data.Services.Client to write code to access the data
exposed by the service.
Case scenarios
In the following case scenarios, you apply what you ve learned in this chapter. If you have difficulty completing this work, review the material in this chapter before beginning the next chapter. You can find answers to these questions in the Answers section at the end of this book.
Case Scenario 1: Working with HTTP Requests
You are a web developer working for Contoso, Ltd, a financial services company. You have been asked to create a feature that returns a custom-generated financial document based on a request made for a report. Requests are made to the reports by using the format report.xps. The data is time sensitive, so it needs to be generated dynamically upon request and then returned to the user as an XPS document. This feature needs to be secured by a custom security model implemented in code. In fact, all requests to the site that hosts the feature should be authenticated based on this model and logged to a custom event log.
620 ChAPTER 10 Writing and Working with HTTP Modules and Web Services
Thinking about how you will build this feature, answer the following questions:
1. 2.
How would you intercept requests for all XPS documents, execute the code to dynamically create the report, and return the results to the user What would you do to implement the custom security and logging feature for all requests to the site
Case Scenario 2: Selecting a Service Model
You are a web developer for Fabrikam Inc., a specialty retail company. You have been asked to write a set of services that allow your partners to view your product catalog and inventory. This information updates daily and is shared across partners. You and your partners work exclusively over the web and have no special communication infrastructure outside of the Internet. You should also expose services that allow these partners to process a user through the shopping experience: cart, checkout, shipping, order history, and so on. You need to be able to track users through the process without committing their details to the transaction system until they submit their order. Thinking about how you will build these services, answer the following questions:
1. 2. 3. 4.
What type of service programming model should you implement Where should you host your service application How might you manage access to common data such as catalog and product information How might you handle user information through the checkout process
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