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70-494 | You are developing an application that uses…

Question: 5

You are developing an application that uses many small images.
When the images load, the application runs slowly.
You need to improve the performance of the application.
What should you do?

A. Preload all the images when the application starts to ensure that the images are cached.
B. Convert the images to ICO file format and stream all images on a single connection.
C. Host all images on a Microsoft Azure web role with multiple instances.
D. Combine all the images into a single image and use CSS to create sprites.

Answer: D

Explanation/Reference:

Because browsers limit how many concurrent HTTP requests they make to a website, a web page with many small icon images can result in a longer load time.
You can combine many small images into a single larger image – a CSS sprite – using the free ASP.NET Sprite and Image Optimization Library available from
Microsoft.

70-494 | You need to choose the appropriate data access…

Question: 4

You need to choose the appropriate data access technology for the cookbook area of the web application. Which data access technology should you choose?

A. WCF Data Services
B. LINQ to SQL
C. Entity Framework
D. ADO.NET

Answer: A

Explanation/Reference:

* Scenario: The cookbook functionality is contained within a client-side application that must connect to the server using HTTP and requires access to the data using JavaScript.

* WCF Data Services (formerly known as “ADO.NET Data Services”) is a component of the .NET Framework that enables you to create services that use the Open
Data Protocol (OData) to expose and consume data over the Web or intranet by using the semantics of representational state transfer (REST). OData exposes data as resources that are addressable by URIs. Data is accessed and changed by using standard HTTP verbs of GET, PUT, POST, and DELETE.

* WCF Data Services uses the OData protocol for addressing and updating resources. In this way, you can access these services from any client that supports
OData. OData enables you to request and write data to resources by using well-known transfer formats: Atom, a set of standards for exchanging and updating data as XML, and JavaScript Object Notation (JSON), a text-based data exchange format used extensively in AJAX application.

70-494 | You need to return the list of the top…

Question: 3

You need to return the list of the top 100 books for the GetTopBooks() method. Which type should you use to retrieve the data?

A. SqlDataReader
B. DataSet
C. DataTable
D. Data View

Answer: A

70-494 | You are creating a new authentication….

Question: 2

You are creating a new authentication system that uses an HTTP header value.
The existing authentication system must continue to operate normally.
You need to implement the custom authentication.
What should you do? (Each correct answer presents a complete solution. Choose all that apply.)

A. Create a class derived from ActionResult and check for a valid HTTP header value in the ExecuteResult method. Change all actions to return this new class.
B. Create an HttpHandler to check for a valid HTTP header value in the ProcessRequest method.
C. Create an HttpModule and check for a valid HTTP header value in the AuthenticateRequest event.
D. Create a class derived from AuthorizeAttribute and check for a valid HTTP header value in the AuthorizeCore method. Change usages of the existing AuthorizeAttribute to use the new class.

Answer: C,D

70-494 | You need to choose the appropriate….

Question: 1

You need to choose the appropriate data access strategy for the college textbook area of the web application. Which data access technology should you implement?

A. WCF Data Services
B. ADO.NET
C. Entity Data Model (EDM)
D. LINQ to SQL

Answer: D