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Microsoft MCSD: App Builder 70-487 certification exam

Competitors yearning for the Microsoft 70-487 confirmation should have exhaustive information and involvement with the accompanying zones.

Essentials for the test

• Accessing Data (20-25%)
• Querying and Manipulating Data by Using the Entity Framework (20-25%)
• Creating and Consuming Web API-based services (20-25%)
• Designing and Implementing Web Services (15-20%)
• Deploying Web Applications and Services (15-20%)

See also https://docs.microsoft.com/en-us/learn/certifications/exams/70-487

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Microsoft MCSD: App Builder 70-487 practice question 1-13

QUESTION 1
DRAG DROP
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.)

QUESTION 2
You develop an application. You are using the ServiceModel Metadata Utility Tool (svcutil.exe) to generate service
bindings.
The service bindings must use stringent security and require full control over the Windows Communication Foundation
(WCF) messaging stack.
You need to configure the service bindings.
Which values should you use? To answer, configure the appropriate options in the dialog box in the answer area;
NOTE: Each correct selection is worth one point.
Hot Area:

Correct Answer:

Box 1: WSHttpBinding
A secure and interoperable binding that is suitable for non-duplex service contracts.
Incorrect: Always select a binding that includes security. By default, all bindings except the element have security
enabled.
Box 2: Sign
Sign. The protected part is digitally signed. This ensures detection of any tampering with the protected message part.
Box 3:
References:
https://docs.microsoft.com/en-us/dotnet/framework/wcf/system-provided-bindings
https://docs.microsoft.com/en-us/dotnet/framework/wcf/understanding-protection-level

QUESTION 3
You are creating an application that retrieves Microsoft SQL Server data from two tables named Product and
ProductModel.
You need to store in two separate lists all the names of the products and the product models for later use by the
application.
How should you complete the code? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:

Correct Answer:

QUESTION 4
You develop an ASP.NET Core microservice on a Windows Docker image. The code for this resides in a VSTS Git
repository.
You create an Azure Service Fabric cluster connection. Your build engineer requires that all continuous integration build
definitions must be approved before release definitions are created.
You need to enable continuous integration for the microservice.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions
to answer area and arrange them in the correct order.
Select and Place:

Correct Answer:

Step 1: Enable the Continuous Integration trigger To make sure that DevOps picks up new commits and builds them, go
to the Triggers tab and enable the Enable continuous integration checkbox. Step 2: Create a build definition by using the
Service Fabric Application template Developers and testers can easily and quickly provision production-like dev and test
environments based on Docker by using templates from Azure. Step 3: Add a task with the command “docker deploy” in
the build definition Thanks to the Microsoft VSTS Docker Deploy task shown in figure, you can now also deploy to
DC/OS by just using your familiar docker-compose.yml file because Microsoft will be performing that “translation” for
you (from your dockercompose.yml file to other formats needed by DC/OS).

QUESTION 5
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains
a unique solution that might meet the stated goals. Some question sets might have more than one correct solution,
while
others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not
appear in the review screen.
You have a web application in a Docker container image. You set the tag for the image as myApp. You plan to deploy
the application to Azure Container Services.
You run the following commands. All commands complete successfully.

You need to ensure that the image can be run on an Azure Container Service cluster. Solution: You run the following
commands:

Does the solution meet the goal?
A. Yes
B. No
Correct Answer: B
First tag the image, and the push it into your private registry.
References: https://medium.com/@pjbgf/azure-kubernetes-service-aks-pulling-private-container-images-from-azurecontainer-registry-acr-9c3e0a0a13f2

QUESTION 6
You are developing a Windows Communication Foundation (WCF) service for a company. The service will be used for
bidirectional communications between the company\\’s physical offices.
You plan to implement Azure Service Bus.
You need to configure the WCF service.
Which type of binding should you use?
A. BasicHttpBinding
B. NetTcpRelayBinding
C. NetTcpBinding
D. NetEventRelayBinding
Correct Answer: B
References: https://docs.microsoft.com/en-us/azure/service-busrelay/service-bus-relay-tutorial

QUESTION 7
You have a Microsoft Visual Studio project named Project1 that is deployed as an Azure web app. The Azure web app
uses an Azure SQL Database.
You plan to deploy updates to the Azure web app by using a Web Deploy Package.
The password for the Azure SQL Database was changed since you first published the Azure web app.
You need to deploy the package by using Windows PowerShell.
Which file should you modify before running the PowerShell deployment script?
A. WebApiConfig.cs from the App_Start folder
B. IdentityConfig.cs from the App_Start folder
C. App.config from the Web Application folder
D. Project1-waws-dev.json from the Configurations folder
Correct Answer: A

QUESTION 8
You are updating an existing multitenant ASP.NET MVC application for medical clinics. The application aggressively
uses output caching to improve performance by caching content for 36 hours. The application uses a query string
parameter
named “clinicID” that contains the clinic that the user is currently viewing.
Users report that they are occasionally seeing data for the wrong clinic. Users also report that sensitive data is stored in
the browser cache folder on their computers.
You need to configure web.config to resolve the reported problems.
You have the following markup:

Which markup segments should you include in Target 1, Target 2 and Target 3 to complete the markup? (To answer,
select the correct markup segment from each drop-down list in the answer area.)
Hot Area:

The application must be deployed from Team Foundation Server after a successful build is completed. The Process tab
of the Build Definition screen is shown in the exhibit. (Click the Exhibit button.)

QUESTION 9
You are developing an ASP.NET MVC application that reads and writes data from a SQL Server database.
You need to prevent the application from reading data that is locked by other transactions. You also need to prevent
exclusive range locks.
Which isolation level should you use?
A. ReadCommitted
B. Serializable
C. Repeatable
D. ReadUncommitted
Correct Answer: A

QUESTION 10
You are developing an ASP.NET MVC application. The application has a page that updates an image stored in a
database. Members of the EntityClient namespace are used to access an Entity Framework data model. Images and
associated
metadata are stored in a single database table.
You need to run a single query that updates an image and associated metadata in the database while returning only the
number of affected rows.
Which method of the EntityCommand type should you use?
A. ExecuteScalar()
B. ExecuteDbDataReader()
C. ExecuteReader()
D. ExecuteNonQuery()
Correct Answer: D
EntityCommand.ExecuteNonQuery method executes the current command, and returns the number of rows affected.
Incorrect Answers:
A: ExecuteScalar() executes the command, and returns the first column of the first row in the result set. Additional
columns or rows are ignored.
References: https://docs.microsoft.com/en-us/dotnet/api/system.data.entityclient.entitycommand.executenonquery
https://docs.microsoft.com/en-us/dotnet/api/system.data.entityclient.entitycommand.executescalar

QUESTION 11
You deploy a RESTful ASP.NET Web API to manage order processing.
You are developing an Azure App Services Web App to consume the API and allow customers to order products. You
use the HttpClient object to process order entries. The API throws SocketException errors when the Web App
experiences
a high volume of concurrent users.
You need to resolve the errors.
What should you do?
A. Implement a Using statement block when declaring the HttpClient object.
B. Increase the value of the Timeout property when declaring the HttpClient object.
C. Use the static modifier to declare the HttpClient object.
D. Create a new HttpClient instance for each API request and use asynchronous method calls.
Correct Answer: C
If the class that wraps the external resource is shareable and thread-safe, create a shared singleton instance or a pool
of reusable instances of the class.
The following example uses a static HttpClient instance, thus sharing the connection across all requests.
public class SingleHttpClientInstanceController : ApiController {
private static readonly HttpClient httpClient;
static SingleHttpClientInstanceController()
{
httpClient = new HttpClient();
}
// This method uses the shared instance of HttpClient for every call to GetProductAsync. public async Task
GetProductAsync(string id) {
var hostName = HttpContext.Current.Request.Url.Host; var result = await
httpClient.GetStringAsync(string.Format(“http://{0}:8080/api/…”, hostName));
return new Product { Name = result };
}
}
References: https://docs.microsoft.com/en-us/azure/architecture/antipatterns/improper-instantiation/

QUESTION 12
You are creating a WCF service.
The service endpoints must be exposed to the Windows Azure Service Bus. The service bus has a namespace named
RestaurantSB. The key provider is “owner”.
You need to modify the web.config file to expose the endpoints.
How should you modify the file? (To answer, drag the appropriate attributes to the correct location or locations in the
answer area. Each attribute 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:

Correct Answer:

QUESTION 13
You are configuring a web application for deployment.
You need to create a SetParameters.xml file to configure the IIS application pool.
You have the following markup:

Which configuration values should you include in Target 1 and Target 2 to complete the markup? (To answer, drag the
appropriate configuration values to the correct targets in the answer area. Each configuration value 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:

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