Salesforce MuleSoft Salesforce-MuleSoft-Developer-II試験と認定テストエンジン [Q20-Q44]

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質問 # 20
A Mule implementation uses a HTTP Request within an Unit Successful scope to connect to an API.
How should a permanent error response like HTTP:UNAUTHORIZED be handle inside Until Successful to reduce latency?

• A. Put the HTTP Request inside a try scope in Unit Successful.
  In the error handler, use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED.
• B. In Until Successful configuration, set the retry count to 1 for error type HTTP: UNAUTHORIZED.
• C. Configure retrying until a MULERETRY_EXHAUSTED error is raised or the API responds back with a successful response.
• D. Put the HTTP Request inside a try scope in Unit Successful.
  In the error handler, use On Error Propagate to catch permanent errors like HTTP UNAUTHORIZED.

正解：A

解説：
To handle a permanent error response like HTTP:UNAUTHORIZED inside Until Successful, the developer should put the HTTP Request inside a try scope in Unit Successful, and use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED in the error handler. This way, the developer can avoid retrying requests that will always fail due to a permanent error, and reduce latency. On Error Continue allows the flow to continue processing after handling the error. Reference: https://docs.mulesoft.com/mule-runtime/4.3/until-successful-scope https://docs.mulesoft.com/mule-runtime/4.3/on-error-continue-concept

質問 # 21
A Mule application uses API autodiscovery to access and enforce policies for a RESTful implementation.

• A. Any of the APIkit generate implement flows
• B. The name of the flow that has APlkit Console to receive all incoming RESTful operation requests.
• C. Northing because flowRef is an optional attribute which can be passed runtime
• D. The name of the flow that has HTTP listener to receive all incoming RESTful operation requests

正解：D

解説：
To use API autodiscovery to access and enforce policies for a RESTful implementation, flowRef must be set to the name of the flow that has HTTP listener to receive all incoming RESTful operation requests. This way, API autodiscovery can identify the API implementation and associate it with the corresponding API specification and policies in API Manager. The flow that has HTTP listener is usually the main flow that contains the APIKit Router. Reference: https://docs.mulesoft.com/api-manager/2.x/api-auto-discovery-new-concept#flowref

質問 # 22
Which plugin or dependency is required to unit test modules created with XML SDK?

• A. Junit
• B. MUnit Maven plugin
• C. XMLUnit
• D. MUnit Extensions Maven plugin

正解：D

解説：
To unit test modules created with XML SDK, the developer needs to use the MUnit Extensions Maven plugin. This plugin allows testing XML SDK modules using MUnit by adding a dependency to the module under test and using a custom processor tag to invoke it. Reference: https://docs.mulesoft.com/mule-sdk/1.1/xml-sdk#testing

質問 # 23
A system API that communicates to an underlying MySQL database is deploying to CloudHub. The DevOps team requires a readiness endpoint to monitor all system APIs.
Which strategy should be used to implement this endpoint?

• A. Create a dedicated endpoint that responds with the API status and reachability of the underlying systems
• B. Create a dedicated endpoint that responds with the API status and health of the server
• C. Create a dedicated endpoint that responds with the API status only
• D. Use an existing resource endpoint of the API

正解：A

解説：
To implement a readiness endpoint to monitor all system APIs, the developer should create a dedicated endpoint that responds with the API status and reachability of the underlying systems. This way, the DevOps team can check if the system API is ready to receive requests and if it can communicate with its backend systems without errors. Reference: https://docs.mulesoft.com/mule-runtime/4.3/deployment-strategies#readiness-probes

質問 # 24
Refer to the exhibit.

When creating a new project, which API implementation allows for selecting the correct API version and scaffolding the flows from the API specification?

• A. Import RAML from local file
• B. Download RAML from Design Center
• C. Generate a local RAML from anypoint Studio
• D. Import a published API

正解：B

解説：
To create a new project that selects the correct API version and scaffolds the flows from the API specification, the developer should import a published API. This option allows importing an API specification that has been published to Anypoint Exchange or Design Center, and selecting a specific version of that API specification. The developer can also choose to scaffold flows based on that API specification. Reference: https://docs.mulesoft.com/apikit/4.x/apikit-4-new-project-task

質問 # 25
A developer is working on a project that requires encrypting all data before sending it to a backend application. To accomplish this, the developer will use PGP encryption in the Mule 4 Cryptography module.
What is required to encrypt the data before sending it to the backend application?

• A. The application needs the public key from the backend service to encrypt the data
• B. The application needs to both the private and public keys to encrypt the data
• C. The application needs to configure HTTPS TLS context information to encrypt the data
• D. The application needs the private key from the backend service to encrypt the data

正解：A

解説：
To encrypt the data before sending it to the backend application using PGP encryption, the application needs the public key from the backend service. PGP encryption uses a public-key cryptography system, which means that each party has a pair of keys: a public key and a private key. The public key is used to encrypt data, and the private key is used to decrypt data. Therefore, to encrypt data for a specific recipient (the backend service), the application needs to use the recipient's public key. The recipient can then use its own private key to decrypt the data. Reference: https://docs.mulesoft.com/mule-runtime/4.3/cryptography-pgp

質問 # 26
In a Mule project, Flow-1 contains a flow-ref to Flow-2 depends on data from Flow-1 to execute successfully.
Which action ensures the test suites and test cases written for Flow-1 and Flow-2 will execute successfully?

• A. Chain together the test suites and test cases for Flow-1 and Flow-2
• B. Use ''Set Event to pass the input that is needed, and keep the test cases for Flow-1 and Flow-2 independent
• C. Use ''Before Test Case'' To collect data from Flow-1 test cases before running Flow-2 test cases
• D. Use 'After Test Case' to produce the data needed from Flow-1 test cases to pass to Flow-2 test cases

正解：B

解説：
To ensure the test suites and test cases written for Flow-1 and Flow-2 will execute successfully, the developer should use a Set Event processor to pass the input that is needed by Flow-2, and keep the test cases for Flow-1 and Flow-2 independent. This way, the developer can isolate the testing of each flow and avoid coupling them together. Reference: https://docs.mulesoft.com/munit/2.3/munit-test-flow

質問 # 27
When a client and server are exchanging messages during the mTLS handshake, what is being agreed on during the cipher suite exchange?

• A. An encryption algorithm
• B. A protocol
• C. The Public key format
• D. The TLS version

正解：A

解説：
A cipher suite is a set of cryptographic algorithms that are used to secure the communication between a client and a server. A cipher suite consists of four components: a key exchange algorithm, an authentication algorithm, an encryption algorithm, and a message authentication code (MAC) algorithm. During the cipher suite exchange, the client and the server agree on which encryption algorithm to use for encrypting and decrypting the data. Reference: https://docs.mulesoft.com/mule-runtime/4.3/tls-configuration#cipher-suites

質問 # 28
A developer deploys an API to CloudHub and applies an OAuth policy on API Manager. During testing, the API response is slow, so the developer reconfigures the API so that the out-of-the-box HTTP Caching policy is applied first, and the OAuth API policy is applied second.
What will happen when an HTTP request is received?

• A. In case of a cache it, only the HTTP Caching policy is evaluating; then the cached response is returned to the caller
• B. In case of a cache miss, only the HTTP Caching policy is evaluated; then the API retrieves the data from the API implementation, and the policy stores the data to be cached in Object Store
• C. In case of a cache miss, both the OAuth and HTTP Caching policies are evaluated; then the API retrieves the data from the API implementation, and the policy does not store the data in Object Store
• D. In case of a cache hit, both the OAuth and HTTP Caching policies are evaluated; then the cached response is returned to the caller

正解：A

解説：
When an HTTP request is received and the HTTP Caching policy is applied first, it checks if there is a cached response for that request in Object Store. If there is a cache hit, meaning that a valid cached response exists, then only the HTTP Caching policy is evaluated and the cached response is returned to the caller without invoking the OAuth policy or the API implementation. If there is a cache miss, meaning that no valid cached response exists, then both the HTTP Caching policy and the OAuth policy are evaluated before invoking the API implementation. Reference: https://docs.mulesoft.com/api-manager/2.x/http-caching-policy#policy-ordering

質問 # 29
A Mule implementation uses a HTTP Request within an Unit Successful scope to connect to an API.
How should a permanent error response like HTTP:UNAUTHORIZED be handle inside Until Successful to reduce latency?

• A. Put the HTTP Request inside a try scope in Unit Successful.
  In the error handler, use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED.
• B. In Until Successful configuration, set the retry count to 1 for error type HTTP: UNAUTHORIZED.
• C. Configure retrying until a MULERETRY_EXHAUSTED error is raised or the API responds back with a successful response.
• D. Put the HTTP Request inside a try scope in Unit Successful.
  In the error handler, use On Error Propagate to catch permanent errors like HTTP UNAUTHORIZED.

正解：A

解説：
To handle a permanent error response like HTTP:UNAUTHORIZED inside Until Successful, the developer should put the HTTP Request inside a try scope in Unit Successful, and use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED in the error handler. This way, the developer can avoid retrying requests that will always fail due to a permanent error, and reduce latency. On Error Continue allows the flow to continue processing after handling the error. Reference: https://docs.mulesoft.com/mule-runtime/4.3/until-successful-scope https://docs.mulesoft.com/mule-runtime/4.3/on-error-continue-concept

質問 # 30
A Mule application need to invoice an API hosted by an external system to initiate a process. The external API takes anywhere between one minute and 24 hours to compute its process.
Which implementation should be used to get response data from the external API after it completes processing?

• A. Use a Scheduler to check for a response every minute
• B. Use an HTTP Connector inside Async scope to invoice the API and wait for a response
• C. Use an HTTP Connector to invoke the API and wait for a response
• D. Expose an HTTP callback API in Mule and register it with the external system

正解：D

解説：
To get response data from the external API after it completes processing, the developer should expose an HTTP callback API in Mule and register it with the external system. This way, the external API can invoke the callback API with the response data when it is ready, instead of making the Mule application wait for a long time or poll for a response repeatedly. Reference: https://docs.mulesoft.com/mule-runtime/4.3/http-listener-ref#callback

質問 # 31
A company with MuleSoft Titanium develops a Salesforce System API using MuleSoft out-of-the-box Salesforce Connector and deploys the API to CloudHub.
Which steps provide the average number of requests and average response time of the Salesforce Connector?

• A. Access Anypoint Monitoring built-in dashboard.
  Select a resource.
  Locate the information under Log Manager < Raw Data.
• B. Change the API Implementation to capture the information in the log.
  Retrieve the information from the log file.
• C. Access Anypoint Monitoring's built-in dashboard. Select a resource.
  Locate the information under the Connectors tab.
• D. Access Anypoint Monitoring's built-in dashboard
  Seclect a resource.
  Create a custom dashboard to retrieve the information.

正解：C

解説：
To get the average number of requests and average response time of the Salesforce Connector, the developer should access Anypoint Monitoring's built-in dashboard, select a resource (such as an application or an API), and locate the information under the Connectors tab. The Connectors tab shows metrics for each connector used by the resource, such as average requests per minute, average response time, and failures. Reference: https://docs.mulesoft.com/monitoring/built-in-dashboard-reference

質問 # 32
A healthcare portal needs to validate the token that it sends to a Mule API. The developer plans to implement a custom policy using the HTTP Policy Transform Extension to match the token received in the header from the heathcare portal.
Which files does the developer need to create in order to package the custom policy?

• A. JSON properties file, XML template file
• B. Deployable ZIP file, YAML configuration file
• C. XML template file, YAML configuration file
• D. JSON properties file, YAML configuration file

正解：C

解説：
To package a custom policy using the HTTP Policy Transform Extension, the developer needs to create an XML template file and a YAML configuration file. The XML template file defines the policy logic using Mule components and placeholders for user-defined properties. The YAML configuration file defines the metadata of the policy, such as its name, description, category, parameters, and dependencies. Reference: https://docs.mulesoft.com/api-manager/2.x/http-policy-transform#packaging-the-policy

質問 # 33
A new Mule project has been created in Anypoint Studio with the default settings.
Which file inside the Mule project must be modified before using Maven to successfully deploy the application?

• A. Pom.xml
• B. Settings.xml
• C. Config.yaml
• D. Mule.artificact.json

正解：A

解説：
To use Maven to successfully deploy the application, the developer needs to modify the pom.xml file inside the Mule project. The pom.xml file contains the configuration and dependencies of the Mule application, as well as the deployment information such as the CloudHub region, environment, and worker size. The developer needs to specify these properties in the pom.xml file before using Maven to deploy the application. Reference: https://docs.mulesoft.com/mule-runtime/4.3/mmp-concept#application-deployment-descriptor

質問 # 34
A Mule application deployed to multiple Cloudhub 2.0 replicas needs to temporarily persist large files over 10MB between flow executions, and routinely needs to query whether the file data exists on separate executions.
How can this be achieved?

• A. Store the key and full contents of the file, caching the filename and location between requests
• B. Store the contents of the file on separate storage, and store the key and location of the file Object using Object Store v2
• C. Store the key and full contents of the file in an Object Store
• D. Use an in-memory Object Store

正解：B

解説：
To temporarily persist large files over 10MB between flow executions, and routinely query whether the file data exists on separate executions, the developer should store the contents of the file on separate storage, and store the key and location of the file object using Object Store v2. This way, the developer can avoid storing large files in memory or exceeding the size limit of Object Store v2 (10MB per object). The developer can also use Object Store v2 operations to query, retrieve, or delete the file object by its key. Reference: https://docs.mulesoft.com/object-store/osv2-faq#can-i-store-files-in-object-store-v2

質問 # 35
A Mule application for processing orders must log the order ID for every log message output.
What is a best practice to enrich every log message with the order ID?

• A. Set a flow variable and edit the log4/2.xml file to output the variable as part of the message pattern
• B. Use flow variables within every logger processor to log the order ID
• C. Create a custom XML SDK component to wrap the logger processor and automatically add the order ID within the connector
• D. Use the Tracing module to set logging variables with a Mapped Diagnostic Context

正解：D

解説：
To enrich every log message with the order ID, the developer should use the Tracing module to set logging variables with a Mapped Diagnostic Context (MDC). The Tracing module allows adding custom key-value pairs to log messages using MDC variables. The developer can use Set Logging Variables operation to set the order ID as an MDC variable and then use it in any logger processor within the same thread or event. Reference: https://docs.mulesoft.com/tracing-module/1.0/tracing-module-reference#set-logging-variables

質問 # 36
Which statement is true when working with correlation IDS?

• A. The HTTP Listener generates correlation IDS unless a correlation ID is received in the HTTP request
• B. The HTTP Listener regenerates correlation IDs regardless of the HTTP request
• C. The VM Connector does not automatically propagate correction IDs
• D. The Anypoint MQ Connector automatically propagates correlation IDS

正解：A

解説：
When working with correlation IDs, the HTTP Listener generates correlation IDs unless a correlation ID is received in the HTTP request. In that case, it propagates the received correlation ID throughout the flow execution. Correlation IDs are used to track events across different flows or applications. Reference: https://docs.mulesoft.com/mule-runtime/4.3/about-mule-message#message-attributes

質問 # 37
Refer to the exhibit.
What is the result of the Mule Maven Plugin configuration of the value of property its,keystorePassoword in CloudHub 2.0?

• A. CloudHub encrypts the value
• B. The Mule server encrypts the value
• C. Anypoint Studio secures the value
• D. Runtime Manager masks the value

正解：D

解説：
The result of the Mule Maven Plugin configuration of the value of property its,keystorePassword in CloudHub 2.0 is that Runtime Manager masks the value. This means that Runtime Manager hides or obscures the value from anyone who views it in Runtime Manager or Anypoint Platform. Reference: https://docs.mulesoft.com/runtime-manager/runtime-manager-agent-for-mule4#properties-tab

質問 # 38
A Mule application includes a subflow containing a Scatter.Gather scope. Within each log of the Scatter.Gatter. an HTTP connector calls a PUT endpoint to modify records in different upstream system. The subflow is called inside an Unit successful scope to retry if a transitory exception is raised.
A technical spike is being performed to increase reliability of the Mule application.
Which steps should be performed within the Mule flow above the ensure idempontent behavior?

• A. None, the flow already exhibits idempotent behavior
• B. Change the PUT requests inside the Scatter-Gather to POST requests
• C. Ensure an error-handling flow performs corrective actions to roll back all changes if any leg of the Scatter-Gather fails
• D. Remove the Put requests from the Scatter-Getter and perform them sequentially

正解：C

解説：
To ensure idempotent behavior within a Mule flow that contains a subflow with a Scatter-Gather scope, the developer should ensure an error-handling flow performs corrective actions to roll back all changes if any leg of the Scatter-Gather fails. Idempotency means that multiple identical requests have the same effect as a single request. Therefore, if one of the HTTP requests inside the Scatter-Gather fails, the error-handling flow should undo any changes made by other successful requests to ensure consistency and avoid partial updates. Reference: https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-concept https://docs.mulesoft.com/mule-runtime/4.3/error-handling

質問 # 39
Which pattern should be used to invoke multiple HTTP APIs in parallel and roll back failed requests in sequence?

• A. Scatter-Gather as central Saga orchestrator for all API request with compensating actions for failing routes
• B. A database as a transactional outbox and an Until Successful router to retry any requests
• C. A Parallel for Each scope with each HTTP request wrapped in a Try scope
• D. VM queues as a reliability pattern with error handlers to roll back any requests

正解：A

解説：
To invoke multiple HTTP APIs in parallel and roll back failed requests in sequence, the developer should use a Scatter-Gather router as a central Saga orchestrator for all API requests with compensating actions for failing routes. A Scatter-Gather router executes multiple routes concurrently and aggregates the results. A Saga orchestrator coordinates a series of actions across different services and handles failures by executing compensating actions. Therefore, using a Scatter-Gather router as a Saga orchestrator allows invoking multiple HTTP APIs in parallel and rolling back any failed requests in sequence. Reference: https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-concept https://docs.mulesoft.com/mule-runtime/4.3/saga

質問 # 40
When implementing a synchronous API where the event source is an HTTP Listener, a developer needs to return the same correlation ID back to the caller in the HTTP response header.
How can this be achieved?

• A. Configure a custom correlation policy
• B. Enable the CorrelationID checkbox in the HTTP Listener configuration
• C. NO action is needed as the correlation ID is returned to the caller in the response header by default
• D. Enable the auto-generate CorrelationID option when scaffolding the flow

正解：C

解説：
When implementing a synchronous API where the event source is an HTTP Listener, Mule automatically propagates some message attributes between flows via outbound and inbound properties. One of these attributes is correlation ID, which is returned to the caller in the response header by default as MULE_CORRELATION_ID. Reference: https://docs.mulesoft.com/mule-runtime/4.3/about-mule-message#message-attributes

質問 # 41
Refer to the exhibit.

A Mule application pom.xml configures the Maven Resources plugin to exclude parsing binary files in the project's src/main/resources/certs directory.
Which configuration of this plugin achieves a successful build?

• A.
• B.
• C.
• D.

正解：C

解説：
To configure the Maven Resources plugin to exclude parsing binary files in the project's src/main/resources/certs directory, option C should be used. This option specifies that any files with .cer or .jks extensions under the certs directory should be excluded from filtering. Filtering is a process of replacing placeholders with actual values in resource files during the build process. Binary files should not be filtered because they may become corrupted or unusable. Reference: https://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html https://maven.apache.org/plugins/maven-resources-plugin/examples/include-exclude.html

質問 # 42
A scatter-gather router is configured with four routes:Route A, B, C and D.
Route C false.

• A. Payload ['2']
• B. Error,errorMessage,payload.failures['2']
• C. Error,errorMesage.payload.results ['2']
• D. Payload failures['2']

正解：C

解説：
The result of accessing route C failure is Error,errorMessage,payload.failures['2']. This is because a scatter-gather router returns an aggregated message that contains an array of results from each route and an array of failures from each route. The failures array contains error objects with information about each failed route execution. To access route C failure, which is the third route (index 2), the developer needs to use Error.errorMessage.payload.failures['2'] expression. Reference: https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-reference#scatter-gather-output

質問 # 43
A heathcare customer wants to use hospital system data, which includes code that was developed using legacy tools and methods. The customer has created reusable Java libraries in order to read the data from the system.
What is the most effective way to develop an API retrieve the data from the hospital system?

• A. Create the Java code in your project and invoice the data from the code
• B. Refer to JAR files in the code
• C. Install libraries in a local repository and refer to it in the pm.xml file
• D. Include the libraries writes deploying the code into the runtime

正解：C

解説：
To develop an API that retrieves data from a hospital system using reusable Java libraries, the developer should install libraries in a local repository and refer to it in the pom.xml file. This way, the developer can use Maven to manage dependencies and invoke Java code from Mule applications using Java Module operations. Reference: https://docs.mulesoft.com/mule-runtime/4.3/java-module-reference#add-the-java-module-to-your-project https://docs.mulesoft.com/mule-runtime/4.3/java-module-reference#invoke-java-code

質問 # 44
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