###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

You need to configure the Windows 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.)
Select and Place:

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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.
With which code segment should you replace the body of the SaveChanges() method in the
FlightInfoContext.es file?

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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?

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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.)

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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?

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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?

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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?

###BeginCaseStudy###

Topic 1, Flight Information
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 Windows 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 thirdparty
assemblies must have strong names.
Application Structure

###EndCaseStudy###

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?