Mule-Dev-301 Musterprüfungsfragen & Mule-Dev-301 Examsfragen

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Salesforce Mule-Dev-301 Exam Syllabus Topics:

Section	Objectives
Security and Governance	- API policies and security enforcement - Authentication and authorization mechanisms
Error Handling and Troubleshooting	- Exception handling strategies in Mule applications - Debugging and logging techniques
Integration and API-led Connectivity	- API-led connectivity principles - System, Process, and Experience APIs design
Anypoint Platform Development	- Anypoint Studio usage and project structure - Mule application development
DataWeave and Data Transformation	- Mapping, filtering, and payload manipulation - DataWeave scripting and transformations
Deployment and Testing	- Unit testing and integration testing approaches - Deployment strategies across environments

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Salesforce Certified MuleSoft Developer II Mule-Dev-301 Prüfungsfragen mit Lösungen (Q27-Q32):

27. Frage
An API has been developed and deployed to CloudHub. Among the policies applied to this API is an allowlist of IP addresses. A developer wants to run a test in Anypoint Studio and does not want any policies applied because their workstation is not included in the allowlist.
What must the developer do in order to run this test locally without the policies applied?

A. Pass in the runtime parameter "-Danypoint.platform.gatekeeper=disabled"
B. Create a properties file specifically for local development and set the API instance ID to a value that is not used in API Manager
C. Run the test as-is, with no changes, because the Studio runtime will not attempt to connect to API Manager
D. Deactivate the API in API Manager so the Autodiscovery element will not find the application when it runs in Studio

Antwort: B

Begründung:
API Autodiscovery is what pairs a Mule application with a particular API Manager instance. The apiId in the Autodiscovery configuration identifies the managed API from which the runtime obtains API configuration and policies. Therefore, using an environment-specific configuration for local development prevents the locally running application from binding to the production API instance and consequently prevents those production policies from governing local test traffic.
This is different from setting anypoint.platform.gatekeeper=disabled. Gatekeeper controls whether a managed API is blocked while policy information is unavailable or being synchronized; disabling Gatekeeper is not equivalent to disabling API Manager policies. Policies can still be downloaded and applied when the application remains paired through Autodiscovery.
Running the application unchanged is also incorrect because a locally executed Mule runtime can connect to API Manager when Autodiscovery and platform credentials are configured. MuleSoft explicitly documents local Autodiscovery for policy testing. Deactivating the shared API is likewise inappropriate because it modifies centrally managed configuration rather than isolating the developer's local environment.
Reference topics: API Autodiscovery; API Instance ID; Environment-specific Configuration; Mule Gateway Gatekeeper.
Official documentation: https://docs.mulesoft.com/mule-gateway/mule-gateway-autodiscovery-overview

28. Frage
Which plugin or dependency is required to unit test modules created with XML SDK?

A. MUnit Extensions Maven plugin
B. MUnit Maven plugin
C. XMLUnit
D. JUnit

Antwort: A

Begründung:
Modules and connectors are extensions to the Mule runtime rather than ordinary Mule applications. Their tests therefore require the extension-oriented MUnit test infrastructure, represented by the MUnit Extensions Maven Plugin (munit-extensions-maven-plugin).
MuleSoft's XML SDK documentation shows that an XML SDK project includes MUnit tests under src/test
/munit, and building the module runs those tests as part of the module build lifecycle. MuleSoft's connector- testing documentation explicitly references munit-extensions-maven-plugin when configuring tests for Mule extensions and modules.
The standard MUnit Maven Plugin is principally associated with executing MUnit suites for Mule applications in Maven/CI environments. XML SDK modules require testing in the extension/module context, which is why the extensions variant is the relevant plugin.
JUnit is a Java testing framework and does not by itself provide the Mule runtime and extension environment required to execute XML SDK module operations. XMLUnit, meanwhile, is designed for XML comparison and validation; it is not the Mule module-testing framework.
Therefore, the correct Maven component for unit testing XML SDK-created modules is the MUnit Extensions Maven Plugin.
Reference topics: XML SDK; MUnit; module testing; munit-extensions-maven-plugin; Mule extension build lifecycle.
Official documentation: https://docs.mulesoft.com/mule-sdk/latest/xml-sdk Official documentation: https://docs.mulesoft.com/mule-sdk/latest/partner-connector-upgrade

29. Frage
Refer to the exhibits.
A Mule application's 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?
Exhibits - Options A and B:

Exhibits - Options C and D:

A. Configuration shown in Exhibit B
B. Configuration shown in Exhibit C
C. Configuration shown in Exhibit A
D. Configuration shown in Exhibit D

Antwort: B

Begründung:
Resource filtering is designed primarily for textual resources in which Maven substitutes property expressions. Binary files such as PKCS#12 keystores and certificate files must not be passed through text filtering because filtering can corrupt their binary representation.
The Maven Resources Plugin provides the dedicated configuration element nonFilteredFileExtensions. Each additional extension is declared using a nested nonFilteredFileExtension. The plugin documentation specifically defines this parameter as the list of additional file extensions to which filtering must not be applied.
Option C correctly uses the documented structure:
< nonFilteredFileExtensions >
< nonFilteredFileExtension > p12 < /nonFilteredFileExtension >
< nonFilteredFileExtension > crt < /nonFilteredFileExtension >
< nonFilteredFileExtension > pem < /nonFilteredFileExtension >
< /nonFilteredFileExtensions >
This is important because the application's normal resource configuration can still use < filtering > true <
/filtering > for textual files while Maven leaves the listed certificate/keystore formats untouched.
The alternative constructs visible in the other exhibits, such as excludeFileExtensions or excludeBinaryFiles, are not the Maven Resources Plugin parameter used for this purpose.
Reference topics: Maven Resources Plugin; resource filtering; binary resources; nonFilteredFileExtensions; Mule Maven builds.
Official documentation: https://maven.apache.org/plugins/maven-resources-plugin/resources-mojo.html

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

Antwort: C

Begründung:
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

31. Frage
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 healthcare 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. JSON properties file, YAML configuration file
D. XML template file, YAML configuration file

Antwort: D

Begründung:
For the Mule 4 custom-policy development model represented by this question, the policy's runtime behavior is implemented in an XML template, while the policy's configurable parameters and metadata are described in a YAML configuration file.
The XML template uses Mule's XML configuration language and policy-specific elements such as http-policy:
proxy, http-policy:source, http-policy:operation, and http-policy:execute-next. In this scenario, the developer can place the header-token inspection and validation behavior in this implementation layer. The accompanying YAML file exposes configurable policy parameters to API Manager and provides the metadata needed for policy configuration.
MuleSoft's custom-policy development reference identifies an XML template and YAML file as core policy project artifacts; the complete project additionally contains its POM, Mule artifact descriptor, and any optional resources.
A ZIP file is not the source artifact pair used to define the policy. Similarly, a generic JSON properties file is not a replacement for the implementation template in this Mule 4 custom-policy model.
Thus, among the available combinations, the XML policy template together with the YAML configuration file is the required pair.
Reference topics: Mule Gateway custom policies; XML policy templates; YAML policy configuration; HTTP Policy Transform Extension.
Official documentation: https://docs.mulesoft.com/mule-gateway/policies-custom-mule-4-reference

32. Frage
......

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