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Salesforce Mule-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Implement Performant and Reliable Mule Applications	27%	- Implement reliable messaging patterns - Optimize performance and throughput - Handle HTTP API invocations and errors - Validate messages and payloads - Use ObjectStore for persistence
Design and Implement API-led Connectivity	13%	- Implement HTTP callbacks/webhooks - Implement server-side caching - Implement API autodiscovery
Secure Data at Rest and in Transit	20%	- Expose and invoke APIs over HTTPS - Manage keys and certificates - Manage secure environment properties - Implement security policies
Implement Monitorable Mule Applications	15%	- Expose health check endpoints - Implement logging and log management - Implement message correlation - Monitor applications and runtimes
Implement Maintainable and Modular Mule Applications and Maven Builds	25%	- Build custom policies and processors - Execute tests with Maven - Modularize applications and builds - Implement automated deployment - Create reusable libraries

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Salesforce Certified MuleSoft Developer II 認定 Mule-Dev-301 試験問題 (Q10-Q15):

質問 # 10
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. Use ''Set Event to pass the input that is needed, and keep the test cases for Flow-1 and Flow-2 independent
B. Use 'After Test Case' to produce the data needed from Flow-1 test cases to pass to Flow-2 test cases
C. Chain together the test suites and test cases for Flow-1 and Flow-2
D. Use ''Before Test Case'' To collect data from Flow-1 test cases before running Flow-2 test cases

正解：A

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 # 11
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. Remove the Put requests from the Scatter-Getter and perform them sequentially
B. None, the flow already exhibits idempotent behavior
C. Change the PUT requests inside the Scatter-Gather to POST requests
D. Ensure an error-handling flow performs corrective actions to roll back all changes if any leg of the Scatter-Gather fails

正解：D

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 # 12
A Mule application uses API autodiscovery to access and enforce policies for a RESTful implementation.
What needs to be configured for the flowRef attribute of the autodiscovery global element?

A. The name of the flow that has HTTP Listener to receive all incoming RESTful operation requests
B. The name of the flow that has APIkit Console to receive all incoming RESTful operation requests
C. Any of the APIkit generated implementation flows
D. Nothing because flowRef is an optional attribute which can be passed during runtime

正解：A

解説：
API Autodiscovery pairs a Mule API implementation with an API instance managed in API Manager. The global autodiscovery element requires the API instance identifier and a flowRef that identifies the flow where API Gateway policy enforcement begins.
MuleSoft explicitly states that flowRef must reference a flow containing an HTTP Listener. The referenced flow represents the inbound API entry point receiving the requests against which API Manager policies are enforced. Connectors that merely use HTTP internally are not sufficient for this requirement.
In an APIkit-generated application, the appropriate flow is typically the main API flow that contains the HTTP Listener and APIkit Router. Individual generated resource/operation flows execute later after routing; they are not the primary inbound policy-enforcement point. Similarly, the APIkit Console flow is intended for interactive API documentation/testing and should not be used as the flowRef for production policy enforcement.
The attribute is not simply supplied dynamically at runtime. It is part of the Mule application's Autodiscovery configuration and identifies the exact listener-based flow paired to API Manager.
Therefore, flowRef must identify the flow containing the HTTP Listener that receives the REST API's incoming requests.
Reference topics: API Autodiscovery; api-gateway:autodiscovery; flowRef; HTTP Listener; API Manager policy enforcement.
Official documentation: https://docs.mulesoft.com/mule-gateway/mule-gateway-config-autodiscovery-mule4

質問 # 13
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 the Tracing module to set logging variables with a Mapped Diagnostic Context
C. Use flow variables within every logger processor to log the order ID
D. Create a custom XML SDK component to wrap the logger processor and automatically add the order ID within the connector

正解：B

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 # 14
A healthcare 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 to retrieve the data from the hospital system?

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

正解：C

解説：
Reusable Java libraries should be managed as Maven dependencies, not manually embedded or referenced through arbitrary filesystem locations. Installing the legacy library artifacts into an accessible Maven repository and declaring their Maven coordinates in the application's pom.xml gives the Mule project a deterministic and maintainable dependency model.
Mule applications use Maven as their build/dependency-management mechanism. MuleSoft's external-library guidance supports adding dependencies through Maven coordinates or local library artifacts, with those dependencies represented in the project's POM. This enables consistent resolution during development and CI
/CD builds and avoids environment-specific hard-coded JAR paths.
Directly referring to JAR files from application code creates brittle coupling to local filesystem structure.
Supplying libraries manually only at deployment time also weakens reproducibility because the application build no longer fully declares its dependencies. Re-creating existing Java integration logic within every Mule application defeats reuse and adds unnecessary maintenance.
Once the Java library is available as a Maven dependency, the Mule Java Module or an appropriate custom module can invoke its functionality while Maven manages versioning and packaging.
Reference topics: Maven dependency management; reusable Java libraries; external libraries; pom.xml; Java Module integration.
Official documentation: https://docs.mulesoft.com/anypoint-code-builder/acb-external-libraries

質問 # 15
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