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Exam Code: 70-494
Exam Name: Recertification for MCSD: Web Applications
Certification Provider: Microsoft
Corresponding Certification: MCSD: Web Applications

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QUESTION 21
The transcode.exe utility activates its license online when it is installed.
You need to ensure that the registration of the transcode utility is handled as specified in its license.
Which method should you add to the TranscodeWorkerRole class?


A.    Option A
B.    Option B
C.    Option C
D.    Option D

Answer: D

Case Study 4 – Scenario 4 (Question 22 – Question 28)
Background
You are developing a flight information consolidation service. The service retrieves flight information from a number of sources and combines them into a single data set.
The consolidated flight information is stored in a SQL Server database.
Customers can query and retrieve the data by using a REST API provided by the service.
The service also offers access to historical flight information. The historical flight information can be filtered and queried in an ad hoc manner.
The service runs on a Microsoft Azure Web Role. SSL is not used.
Business Requirements
– A new data source for historical flight information is being developed by a contractor located on another continent.
– If a time zone is not specified, then it should be interpreted as Coordinated Universal Time (UTC).
– When you upgrade a service from a staging deployment to a production deployment, the time that the service is unavailable must be minimized.
– The default port must be used for HTTP.
Technical Requirements
The existing sources of flight information and the mechanism of exchange are listed below.
– Blue Yonder Airlines provides flight information in an XML file.
– Consolidated Messenger provides flight information in a Microsoft Access database that is uploaded every 12 hours to the service using SFTP. The company uses port 22 for SFTP.
– Margie’s Travel provides and consumes flight information using serialized ADO.NET DataSets. Data is periodically synced between the service and Margie’s Travel.
– Trey Research provides data from multiple sources serialized in proprietary binary formats. The data must be read by using .NET assemblies provided by Trey Research. The assemblies use a common set of dependencies.
– The current version of the Trey Research assemblies is 1.2.0.0. All assemblies provided by Trey Research are signed with a key pair contained in a file named Trey.snk, which Trey Research also supplies.
– The application specification requires that any third-party assemblies must have strong names.
Application Structure
FlightInfo.cs

BlueYonderLoader.cs

HistoricalDataLoader.cs

MargiesTravelSync.cs

FlightInfoContext.cs

FlightDataController.cs

QUESTION 22
Drag and Drop Question
The service has been deployed to Windows Azure.
Trey Research has provided version 1.3.0.0 of the assembly to support a change in the serialization format.
The service must remain available during the transition to the new serialization format.
You need to ensure that the service is using the new assembly.
Which configuration setting should you add to the web.config? (To answer, drag the appropriate configuration elements to the correct location or locations in the answer area. Each configuration element 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.)

Answer:

QUESTION 23
Drag and Drop Question
You need to configure the Microsoft Azure service definition to enable Consolidated Messenger to upload files.
What should you do? (To answer, drag the appropriate configuration items to the correct location or locations. Each configuration item 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.)

Answer:

QUESTION 24
Drag and Drop Question
You need to parse flight information from Blue Yonder Airlines.
The content of the XML file is shown below.

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.)

Answer:

QUESTION 25
Drag and Drop Question
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? (To answer, drag the appropriate properties to the correct location or locations in the answer area. Each property 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.)

Answer:

QUESTION 26
Errors occasionally occur when saving data using the FlightlnfoContext 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.
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

Answer: C
Explanation:
EntitySqlException: Represents errors that occur when parsing Entity SQL command text.
This exception is thrown when syntactic or semantic rules are violated.
SqlException: The exception that is thrown when SQL Server returns a warning or error.
This class cannot be inherited.
EntityCommandExecutionException : Represents errors that occur when the underlying storage provider could not execute the specified command.
This exception usually wraps a provider-specific exception.

QUESTION 27
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

Answer: D

QUESTION 28
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.    WCF Data Services
B.    ADO.NET Entity Framework
C.    UNQ to XML
D.    ADO.NET DataSets

Answer: A

Mix Questions
QUESTION 29
You are developing an ASP.NET MVC application.
The application provides a RESTful API for third-party applications.
This API updates the information for a contact by embedding the information in the URL of an HTTP POST.
You need to save the Contact type when third-party applications use the EditContact method.
Which code segment should you use? (Each correct answer presents a complete solution.
Choose all that apply.)


A.    Option A
B.    Option B
C.    Option C
D.    Option D

Answer: AB

QUESTION 30
You are developing an ASP.NET MVC application that enables you to edit and save a contact.
The application must not save contacts on an HTTP GET request.
You need to implement the controller.
Which code segment should you use? (Each correct answer presents a complete solution.
Choose all that apply.)


A.    Option A
B.    Option B
C.    Option C
D.    Option D

Answer: AC


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