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Developing Windows Azure and Web Services

Question No: 11 – (Topic 1)

Errors occasionally occur when saving data using the FlightInfoContext ADO.NET Entity Framework context. Updates to the data are being lost when an error occurs.

You need to ensure that data is still saved when an error occurs by retrying the operation. No more than five retries should be performed.

Which code segment should you use as the body of the SaveChanges() method in the FlightInfoContext.es file?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: A

Question No: 12 – (Topic 1)

Transformed historical flight information provided by the RemoteDataStream() method must be written to the response stream as a series of XML elements named Flight within a root element named Flights. Each Flight element has a child element named FlightName that contains the flight name that starts with the two-letter airline prefix.

You need to implement the StreamHistoricalFlights() method so that it minimizes the amount of memory allocated.

Which code segment should you use as the body of the StreamHistoricalFlights() method in the HistoricalDataLoader.es file?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: D

Explanation: http://msdn.microsoft.com/en- us/library/system.xml.linq.xstreamingelement.aspx and http://msdn.microsoft.com/en- us/library/bb551307.aspx

Question No: 13 DRAG DROP – (Topic 1)

Flight information data provided by Margie#39;s Travel is updated both locally and remotely. When the data is synced, all changes need to be merged together without causing any data loss or corruption.

You need to implement the Sync() method in the MargiesTravelSync.es file.

What should you do? (To answer, drag the appropriate code segments to the correct location or locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

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Answer:

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Explanation:

Ensurepass 2018 PDF and VCE

http://msdn.microsoft.com/en-us/library/ms135424.aspx

Question No: 14 DRAG DROP – (Topic 1)

You need to parse flight information from Blue Yonder Airlines. The content of the XML file is shown below.

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Some airlines do not specify the timezone of the arrival time. If the timezone is not specified, then it should be interpreted per the business requirements.

You need to implement the LoadFlights() and Parse() methods of the BlueYonderLoader class.

What should you do? (To answer, drag the appropriate code segments to the correct location in the answer area. Each segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

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Answer:

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Question No: 15 – (Topic 1)

Data provided by Consolidated Messenger is cached in the HttpContext.Cache object. You need to ensure that the cache is correctly updated when new data arrives.

What should you do?

  1. Ensure that the EffectivePrivateBytesLimit value is greater than the size of the database file.

  2. Change the sliding expiration of the cache item to 12 hours.

  3. Use the SqlCacheDependency type configured with a connection string to the database file.

  4. Use the CacheDependency type configured to monitor the SFTP target folder.

Answer: D

Question No: 16 – (Topic 1)

You need to recommend a data access technology to the contractor to retrieve data from the new data source.

Which data access technology should you recommend?

  1. LINQ to XML

  2. ADO.NET Entity Framework

  3. ADO.NET DataSets

  4. WCF Data Services

Answer: D

Topic 2, ASP.NET MVC

Background

You are developing an ASP.NET MVC application in Visual Studio 2012 that will be used to process orders.

Business Requirements

The application contains the following three pages:

->A page that queries an external database for orders that are ready to be processed. The user can then process the order.

->A page to view processed orders.

->A page to view vendor information.

The application consumes three WCF services to retrieve external data.

Technical Requirements Visual Studio Solution:

The solution contains the following four projects.

->ExternalQueue: A WCF service project used to communicate with the external order database.

->OrderProcessor: An ASP.NET MVC project used for order processing and logging order metadata.

->OrderUpload: A WCF service project used to submit order data to an external data source.

->Shipping: A WCF service project used to acquire shipping information.

ExternalQueue Project:

Entity Framework is used for data access. The entities are defined in the ExternalOrders.edmx file as shown in the following diagram.

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The project contains two services defined in the following files.

->IExternalQueueService.es

->ExternalQueueService.svc.

The ExternalQueue.Helpers namespace contains a definition for a class named OrderNotFound Exception.

OrderProcessor Project:

Entity Framework is used for data access. The entities are defined in the ProcessedOrders.edmx file as shown in the following diagram.

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The classes are contained in the OrderProcessor.Entities namespace. The project contains the following two controllers.

->InboundQueueController.es

->ProcessedOrderController.es

WCF service proxies to the ExternalQueue, Shipping and OrderUpload services have been generated by using the command prompt. The ExecuteCommandProcedure() method in the ExternalQueueService.svc file must run asynchronously.

The ProcessedOrderController controller has the following requirements.

The GetVendorPolicy() method must enforce a 10 minute absolute cache expiration policy. The GetProcessedOrders() method must return a view of the 10 most recently processed orders.

OrderUpload Project:

The project contains two services defined in the following files:

->IUploadCallbackService.es

->UploadCallbackService.svc

Data Access is maintained in a file named UploadOrder.es.

Shipping Project:

Entity Framework is used for data access. The entities are defined in the ExternalOrders.edmx file as shown in the following diagram.

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The Custom Tool property for ExternalOrders.edmx has been removed.

POCO classes for the Entity Model are located in the ShippingAddress.es file. The POCO entity must be loaded by using lazy loading.

The project contains two services defined in the following files.

->IShippingService.es

->ShippingService.svc.

The IShippingService contract must contain an operation that receives an order number as a parameter. The operation must return a class named ShippingInfo that inherits from a class named State.

Application Structure

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Question No: 17 DRAG DROP – (Topic 2)

The GetVendorPolicy() private method in the ProcessedOrderController controller is returning a

CacheItemPolicy object with default values. The returned policy must expire if the external file located at C:\Triggers\VendorTrigger.txt has been modified or the timeout outlined in the technical requirements is reached.

You need to return the policy.

How should you build the method? (To answer, drag the appropriate code segments to the correct location or locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

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Answer:

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Explanation:

Ensurepass 2018 PDF and VCE

http://msdn.microsoft.com/en-us/library/system.runtime.caching.cacheitempolicy.aspx

Question No: 18 – (Topic 2)

TION NO: 2

The GetExternalOrder() method in the ExternalQueueService service is throwing a runtime error. The method must query the database for a record that matches the orderNum parameter passed to the method.

You need to modify the queryString string to retrieve the record. With which code segment should you replace line EQ64?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: C

Question No: 19 DRAG DROP – (Topic 2)

You need to complete the GetProcessedOrders() action in the ProcessedOrderController controller to meet the requirements.

What should you do? (To answer, drag the appropriate code segments to the correct location or locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

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Answer:

Ensurepass 2018 PDF and VCE

Question No: 20 DRAG DROP – (Topic 2)

You add a class named ShippingInfo.

You need to modify the IShippingService interface and the ShippingInfo class to meet the technical requirements.

What should you do? (To answer, drag the appropriate code segments to the correct location or locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

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Answer:

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Explanation:

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http://msdn.microsoft.com/en-us/library/system.servicemodel.servicecontractattribute.aspx

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