70 486 exam [Oct 2021]

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Q71. - (Topic 2) 

You are designing a Windows Communication Foundation (WCF) service that uses the Product class. 

You need to update the class to meet the storage requirement. 

What should you do? (Each correct answer presents part of the solution. Choose all that apply.) 

A. Mark the Product class with the DataContract attribute. 

B. Mark the public members of the Product class with the DataContractFormat attribute. 

C. Mark the Product class with the CollectionDataContract attribute. 

D. Mark the public members of the Product class with the DataMember attribute. 

Answer: A,D 

Explanation: So as of .NET 3.5 SP1, you don't have to add data contract or data member 

attributes anymore - if you don't then the data contract serializer will serialize all public 

properties on your class, just like the XML serializer would. 

HOWEVER: by not adding those attributes, you lose a lot of useful capabilities: 

. without [DataContract], you cannot define an XML namespace for your data to live 

in . without [DataMember], you cannot serialize non-public properties or fields . without [DataMember], you cannot define an order of serialization (Order=) and the 

DCS will serialize all properties alphabetically . without [DataMember], you cannot define a different name for your property (Name=) . without [DataMember], you cannot define things like IsRequired= or other useful attributes . without [DataMember], you cannot leave out certain public properties - all public properties will be serialized by the DCS 

Q72. - (Topic 4) 

You are developing an ASP.NET MVC web application for viewing a photo album. The application is designed for devices that support changes in orientation, such as tablets and smartphones. The application displays a grid of photos in portrait mode. 

When the orientation changes to landscape, each tile in the grid expands to include a description. The HTML that creates the gallery interface resembles the following markup. 

If this CSS is omitted, the existing CSS displays the tiles in landscape mode. 

You need to update the portrait mode CSS to apply only to screens with a width less than 500 pixels. 

Which code segment should you use? 

A. @media resolution(max-width: 500px) { 

. . . 

} 

B. @media screen(min-width: Opx, max-width: 500px) { 

. . . 

} 

C. @media screen and (width <= 500px) { 

. . . 

} 

D. @media screen and (max-width: 500px) { 

. . . 

} 

Answer: D 

Q73. - (Topic 4) 

You are developing an ASP.NET MVC web application in Visual Studio 2012. The application requires several thousand content files. All content is hosted on the same IIS instance as the application. 

You detect performance issues when the application starts. 

You need to resolve the performance issues. 

What should you do? 

A. Implement HTTP caching in the ASP.NET MVC controllers. 

B. Combine the content files by using ASP.NET MVC bundling. 

C. Install a second IIS instance. 

D. Move the content to a Windows Azure CDN. 

Answer: B 

Q74. - (Topic 4) 

You are developing an ASP.NET MVC application by using Visual Studio 2012. 

The application throws and handles exceptions when it runs. 

You need to examine the state of the application when exceptions are thrown. 

What should you do? 

A. From the Debug menu in Visual Studio 2012, select Exceptions. Enable the Thrown 

check box for Common Language Runtime Exceptions. 

B. From the Debug menu in Visual Studio 2012, select Exceptions. Disable the User-unhandled check box for Common Language Runtime Exceptions. 

C. Add the following code to the web.config file of the application. 

<customErrors mode="On" > 

<error statusCode="500" redirect="CustomErrors.html" /> 

</customErrors> 

D. Add the following code to the web.config file of the application. 

<customErrors mode="On" > 

<error statusCode="404" redirect="CustomErrors.html" /> 

</customErrors> 

Answer: A 

Q75. HOTSPOT - (Topic 1) 

You need to ensure that only valid parameters are passed to the EditLog action. 

How should you build the route? (To answer, select the appropriate options in the answer area.) 

Answer: 

Q76. - (Topic 3) 

You need to ensure that all customers can delete videos regardless of their browser capability. 

Which code segment should you use as the body of the SendAsync method in the DeleteHandler class? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: B 

Q77. - (Topic 4) 

You are developing an ASP.NET MVC application that uses forms authentication against an Oracle database. 

You need to authenticate the users. Which code segment should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: D 

Explanation: When implementing a custom membership provider, you are required to inherit the MembershipProvider abstract class. There are two primary reasons for creating a custom membership provider. You need to store membership information in a data source that is not supported by the membership providers included with the .NET Framework, such as a FoxPro database, an Oracle database, or other data source. You need to manage membership information using a database schema that is different from the database schema used by the providers that ship with the .NET Framework. A common example of this would be membership data that already exists in a SQL Server database for a company or Web site. 

Reference: MembershipProvider Class 

https://msdn.microsoft.com/en-us/library/system.web.security.membershipprovider(v=vs.110).aspx 

Q78. - (Topic 4) 

You are developing a new ASP.NET MVC application that will be hosted on Microsoft Azure. You need to implement caching. 

The caching solution must support the following: 

The cache must be able to store out-of-process ASP.NET session state. 

The cache must be able to store a variety of data types. 

The cache must offer a large amount of space for cached content. 

You must be able to share output cache content across web server instances. 

You need to select a cache solution. 

Which caching solution should you choose? 

A. ASP.NET Caching 

B. Azure In-Role Cache 

C. Azure Redis Cache 

D. Azure Managed Cache Service 

Answer: C 

Reference: How to Use Azure Redis Cache 

https://azure.microsoft.com/sv-se/documentation/articles/cache-dotnet-how-to-use-azure-redis-cache/ 

Q79. HOTSPOT - (Topic 4) 

You are developing an ASP.NET MVC application. The layout page of the application references the jQuery library. You develop a view that uses the layout page. The view includes the following markup: 

The application includes the following class: 

When a user clicks the button, an AJAX call must retrieve the partial view and append it to the newBooks div element. 

You need to implement the AJAX request. 

How should you complete the relevant code? To answer, select the appropriate code segment from each list in the answer area. 

Answer: 

Q80. - (Topic 4) 

You are developing an ASP.NET MVC web application for viewing a list of contacts. The application is designed for devices that support changes in orientation, such as tablets and smartphones. The application displays a grid of contact tiles in portrait mode. 

When the orientation changes to landscape, each tile in the grid expands to include each contact's details. The HTML that creates the tiled interface resembles the following markup. 

The CSS used to style the tiles in landscape mode is as follows. 

If this CSS is omitted, the existing CSS displays the tiles in portrait mode. 

You need to update the landscape-mode CSS to apply only to screens with a width greater than or equal to 500 pixels. 

Which code segment should you use? 

A. @media screen and (width >= 500px) { … } 

B. @media screen and (min-width: 500px) { … } 

C. @media screen(min-width: 500px, max-width: 1000px) { … } 

D. @media resolution(min-width: 500px) { … } 

Answer: B 

Explanation: http://www.javascriptkit.com/dhtmltutors/cssmediaqueries.shtml