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Exam Developing Windows Azure and Web Services
Number 70-487
File Name Developing Windows Azure and Web Services.CertDump.70-487.2020-02-04.1e.122q.vcex
Size 42.9 Mb
Posted February 04, 2020
Downloads 80



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Demo Questions

Question 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?

  • A: LINQ to XML
  • B: Entity Framework
  • C: ADO.NET DataSets
  • D: WCF Data Services



Question 2
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? 

  

  

  • A: Option A
  • B: Option B
  • C: Option C
  • D: Option D



Question 3
You are adding a new REST service endpoint to the FlightDataController controller. It returns flights from the consolidated data sources only for flights that are late. 
You need to write a LINQ to Entities query to extract the required data. 
Which code segment should you use? 

  

  • A: Option A
  • B: Option B
  • C: Option C
  • D: Option D



Question 4
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?

  • A: Ensure that the EffectivePrivateBytesLimit value is greater than the size of the database file.
  • B: Change the sliding expiration of the cache item to 12 hours.
  • C: Use the SqlCacheDependency type configured with a connection string to the database file.
  • D: Use the CacheDependency type configured to monitor the SFTP target folder.



Question 5
You need to load flight information provided by Consolidated Messenger.  
Which should you use?

  • A: SQL Server Data Transformation Services (DTS)
  • B: EntityTransaction and EntityCommand
  • C: Office Open XML
  • D: OleDbConnection and OleDbDataReader



Question 6
You are adding a new REST service endpoint to the FlightDataController controller that returns the total number of seats for each airline. 
You need to write a LINQ to Entities query to extract the required data. 
Which code segment should you use? 

  

  • A: Option A
  • B: Option B
  • C: Option C
  • D: Option D



Question 7
You need to load flight information provided by Consolidated Messenger.  
What should you use?

  • A: Office Open XML
  • B: COM interop
  • C: OleDbConnection and OleDbDataReader
  • D: EntityConnection and EntityDataReader



Question 8
Historical flight information data will be stored in Windows Azure Table Storage using the FlightInfo class as the table entity. 
There are millions of entries in the table. Queries for historical flight information specify a set of airlines to search and whether the query should return only late flights. Results should be ordered by flight name. 
You need to specify which properties of the FlightInfo class should be used at the partition and row keys to ensure that query results are returned as quickly as possible. 
What should you do? (Each correct answer presents part of the solution. Choose all that apply.)

  • A: Use the WasLate property as the row key.
  • B: Use the Airline property as the row key.
  • C: Use the WasLate property as the partition key
  • D: Use the Arrival property as the row key.
  • E: Use the Airline property as the partition key.
  • F: Use the Flight property as the row key.



Question 9
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? 

  

  • A: Option A
  • B: Option B
  • C: Option C
  • D: Option D



Question 10
Errors occasionally occur when saving data using the FlightlnfoContext 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. 
With which code segment should you replace the body of the SaveChanges() method in the FlightInfoContext.cs file? 

  

  • A: Option A
  • B: Option B
  • C: Option C
  • D: Option D








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