Case Study: 2
Scenario 2
Background
You are developing an online shopping web application.
Business Requirements
A user is not required to provide an email address. If a user enters an email address, it must be verified to be
a valid email address.
Information about the first product on the product page must fade out over time to encourage the user to
continue browsing the catalog. Administrators must be able to edit information about existing customers.
Administrators also must be able to specify a default product on the product page.
Technical Requirements
General:
The web store application is in a load-balanced web farm. The load balancer is not configured to useserver
affinity.
The web store application is an ASP.NET MVC application written in Visual Studio 2012.

Products:
The value of the productId property must always be greater than 0. The Products page for mobile devices
must display to mobile users. The Products page fordesktop devices must display to desktop users.
Storage:
The data must be stored in a serialized XML data format.
Serialized objects must be schema-independent.
Exception handling:
Exceptions originating from IIS must display a page with support contact information.
Some page links expire, and users who access these links encounter 404 errors. Exceptions must be
logged by using the WriteLog method of the Utility class.
Browser and device support:
The application must support image format conversions from .bmp to .jpeg for mobile devices.
The application must support image format conversions from .bmp to .png for desktop devices.
Application Structure


********************************************************************
You need to configure session storage in the web.config file to meet the technical requirements for scalability.
Which SessionState mode should you use? (Each correct answer presents a complete solution. Choose all
that apply.)

Case Study: 2
Scenario 2
Background
You are developing an online shopping web application.
Business Requirements
A user is not required to provide an email address. If a user enters an email address, it must be verified to be
a valid email address.
Information about the first product on the product page must fade out over time to encourage the user to
continue browsing the catalog. Administrators must be able to edit information about existing customers.
Administrators also must be able to specify a default product on the product page.
Technical Requirements
General:
The web store application is in a load-balanced web farm. The load balancer is not configured to useserver
affinity.
The web store application is an ASP.NET MVC application written in Visual Studio 2012.

Products:
The value of the productId property must always be greater than 0. The Products page for mobile devices
must display to mobile users. The Products page fordesktop devices must display to desktop users.
Storage:
The data must be stored in a serialized XML data format.
Serialized objects must be schema-independent.
Exception handling:
Exceptions originating from IIS must display a page with support contact information.
Some page links expire, and users who access these links encounter 404 errors. Exceptions must be
logged by using the WriteLog method of the Utility class.
Browser and device support:
The application must support image format conversions from .bmp to .jpeg for mobile devices.
The application must support image format conversions from .bmp to .png for desktop devices.
Application Structure


********************************************************************
You need to update the routes to ensure that a product is always displayed on the product page.
Which code segment should you use?

Case Study: 2
Scenario 2
Background
You are developing an online shopping web application.
Business Requirements
A user is not required to provide an email address. If a user enters an email address, it must be verified to be
a valid email address.
Information about the first product on the product page must fade out over time to encourage the user to
continue browsing the catalog. Administrators must be able to edit information about existing customers.
Administrators also must be able to specify a default product on the product page.
Technical Requirements
General:
The web store application is in a load-balanced web farm. The load balancer is not configured to useserver
affinity.
The web store application is an ASP.NET MVC application written in Visual Studio 2012.

Products:
The value of the productId property must always be greater than 0. The Products page for mobile devices
must display to mobile users. The Products page fordesktop devices must display to desktop users.
Storage:
The data must be stored in a serialized XML data format.
Serialized objects must be schema-independent.
Exception handling:
Exceptions originating from IIS must display a page with support contact information.
Some page links expire, and users who access these links encounter 404 errors. Exceptions must be
logged by using the WriteLog method of the Utility class.
Browser and device support:
The application must support image format conversions from .bmp to .jpeg for mobile devices.
The application must support image format conversions from .bmp to .png for desktop devices.
Application Structure


********************************************************************
The GetDealPrice method must be called by using Ajax. You need to get the price of a product by using the
GetDealPrice method of the ProductController. Whichcode segment should you use? (Each correct answer
presents a complete solution. Choose all that apply.)

Case Study: 2
Scenario 2
Background
You are developing an online shopping web application.
Business Requirements
A user is not required to provide an email address. If a user enters an email address, it must be verified to be
a valid email address.
Information about the first product on the product page must fade out over time to encourage the user to
continue browsing the catalog. Administrators must be able to edit information about existing customers.
Administrators also must be able to specify a default product on the product page.
Technical Requirements
General:
The web store application is in a load-balanced web farm. The load balancer is not configured to useserver
affinity.
The web store application is an ASP.NET MVC application written in Visual Studio 2012.

Products:
The value of the productId property must always be greater than 0. The Products page for mobile devices
must display to mobile users. The Products page fordesktop devices must display to desktop users.
Storage:
The data must be stored in a serialized XML data format.
Serialized objects must be schema-independent.
Exception handling:
Exceptions originating from IIS must display a page with support contact information.
Some page links expire, and users who access these links encounter 404 errors. Exceptions must be
logged by using the WriteLog method of the Utility class.
Browser and device support:
The application must support image format conversions from .bmp to .jpeg for mobile devices.
The application must support image format conversions from .bmp to .png for desktop devices.
Application Structure


********************************************************************

HOTSPOT
You need to implement the mobile device support requirements. How should you build the ProcessRequest
method? (To answer, select the appropriate options in the answer area.)

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

You need to ensure that developers can connect to aWindows Azure role by using RDP. What should you do?

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

Customers download videos by using HTTP clients that support various content encodings. You need to
configure caching on the DownloadVideo action to maximize performance. Which attribute should you add?

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

You need to ensure that all the MVC controllers aresecure. Which code segment should you use as the body
for the CreateController method in AdminVerifierFactory.es?

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

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 shouldyou
do? (Each correct answer presents a complete solution. Choose all that apply.)

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

HOTSPOT
The designer for the website gave you the followingimage as the design for the page.

The normal color for the tab is *2da4c2, and the color when the mouse is over the tab is #ffd800. The HTML
that implements the navigation tab is as follows.

You need to implement the design. What should you do? (To answer, select the appropriate options in the
answer area.)

Case Study: 3
Scenario 3
Background
You are developing a video transcoding service. This service is used by customers to upload video files,
convert video to other formats, and view the converted files. This service is used by customers all over the
world.
Business Requirements
The user-facing portion of the application is an ASP.NET MVC application. It provides an interface for
administrators to upload video and schedule transcoding. It also enables administrators and users to download
the transcoded videos.
When videos are uploaded, they are populated with metadata used to identify the video. The video metadata is
gathered by only one system when the video upload is complete. Customers require support for Microsoft
Internet Explorer 7 and later. The application contains a header that is visible on every page. If thelogged-on
user is an administrator, then the header will contain links to administrative functions. This information is read
from a cookie that is set on the server. The administrative links must not be present if an error condition is
present.
Technical Requirements
User Experience:
The front-end web application enables a user to view a list of videos. The main view of the application is the
web page that displays the list of videos. HTML elements other than the list of videos are changed with every
request requiring the page to reload.
Compatibility:
Some customers use browsers that do not support the HTTP DELETE verb. These browsers send a POST
request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
The video transcoding occurs on a set of Windows Azure worker roles. The transcoding is performed by a
third-party command line tool named transcode.exe. When the tool is installed, an Environment variable
named transcode contains the path to the utility.
A variable named license contains the license key. The license for the transcoding utility requires that it be
unregistered when it is not in use. The transcoding utility requires a significant amount of resources. A
maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process
an additional video, it must not prevent any other roles from processing that video.
The utility logs errors to a Logs directory underthe utilities path. A local Azure directory resource named perf
is used to capture performance data.
Development:
Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.
exe utility.
An x509 certificate has been created and distributed to the developers for this purpose.
Developers must be able to use only RDP and not any other administrative functions.
Application Structure



********************************************************************

You need to maximize performance of video delivery.Which code segment should you use as the body of the
GetVideoStream function in the Video-Controller class?