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Salesforce Mule-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Secure Data at Rest and in Transit	20%	- Implement security policies - Expose and invoke APIs over HTTPS - Manage secure environment properties - Manage keys and certificates
Topic 2: Design and Implement API-led Connectivity	13%	- Implement server-side caching - Implement API autodiscovery - Implement HTTP callbacks/webhooks
Topic 3: Implement Performant and Reliable Mule Applications	27%	- Implement reliable messaging patterns - Validate messages and payloads - Optimize performance and throughput - Use ObjectStore for persistence - Handle HTTP API invocations and errors
Topic 4: Implement Maintainable and Modular Mule Applications and Maven Builds	25%	- Create reusable libraries - Implement automated deployment - Modularize applications and builds - Build custom policies and processors - Execute tests with Maven
Topic 5: Implement Monitorable Mule Applications	15%	- Expose health check endpoints - Monitor applications and runtimes - Implement logging and log management - Implement message correlation

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

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

Antwort: D

Begründung:
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

28. Frage
Refer to the exhibit.
A developer generates the base scaffolding for an API in Anypoint Studio.
Which HTTP status code is returned while testing using the API Kit console if no values are entered in client- id and client-secret?
Exhibit:

A. HTTP status code: 403
B. HTTP status code: 500
C. HTTP status code: 400
D. HTTP status code: 200

Antwort: C

Begründung:
The RAML trait shown in the exhibit declares client_id and client_secret as headers and applies that trait to the /customers resource. Because these headers form part of the API contract, APIkit Router validates the inbound request against the specification before routing it to the generated implementation flow.
If the required request structure is not honored, APIkit raises an APIKIT:BAD_REQUEST error. MuleSoft's APIkit error-handling reference maps APIKIT:BAD_REQUEST directly to HTTP 400, and APIkit scaffolding generates the corresponding error-handling logic with httpStatus set to 400.
A 403 response would normally represent a request that was understood but rejected because of authorization.
That is not what is happening here: the request fails API contract validation before successful routing because required request information is absent. A 500 indicates an internal server failure, which is also inappropriate for malformed client input.
Therefore, when the API Console submits the request without the required header values, the APIkit- generated implementation treats it as a bad request and returns HTTP 400.
Reference topics: APIkit Router validation; RAML traits; required headers; APIKIT:BAD_REQUEST; APIkit-generated error handling.
Official documentation: https://docs.mulesoft.com/apikit/latest/apikit-error-handling-reference

29. Frage
A Mule application defines an SSL/TLS keystore property "tls.keystore.keyPassword" as secure.
How can this property be referenced to access its value within the application?

A. ${secure::tls.keystore.keyPassword}
B. p(secure::tls.keystore.keyPassword)
C. #[secure::tls.keystore.keyPassword]
D. $(secure::tls.keystore.keyPassword)

Antwort: A

Begründung:
Mule Secure Configuration Properties uses the secure:: prefix when an application references a property stored in a secure configuration properties file. Therefore, a property named tls.keystore.keyPassword is referenced using:
${secure::tls.keystore.keyPassword}
MuleSoft's Secure Configuration Properties documentation specifically states that the secure:: prefix is required when loading values from a secure properties file. The same syntax is used whether the property is consumed by a TLS configuration, connector configuration, global element, or another Mule component.
The ${...} syntax represents Mule configuration-property resolution. By contrast, DataWeave runtime expressions use the #[...] form; simply placing a secure-property identifier inside that syntax does not constitute the documented secure configuration-property reference. Likewise, the other alternatives do not use the required Mule configuration-property syntax.
This distinction is particularly important for TLS credentials. A keystore key password should be maintained externally from Mule XML, encrypted in the secure properties source, and resolved through the Secure Configuration Properties module at runtime.
Therefore, the correct reference is ${secure::tls.keystore.keyPassword}.
Reference topics: Secure Configuration Properties; secure:: prefix; encrypted application properties; TLS keystore credentials.
Official documentation: https://docs.mulesoft.com/mule-runtime/4.9/secure-configuration-properties

30. Frage
Which statement is true when working with correlation IDS?

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

Antwort: B

Begründung:
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

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

Antwort: C

32. Frage
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