Salesforce Mule-Dev-301 Exam Practice Material in Three Diverse Versions

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Salesforce Mule-Dev-301 Exam Syllabus Topics:

SectionWeightObjectives
Implement Monitorable Mule Applications15%- Implement logging and log management
- Monitor applications and runtimes
- Implement message correlation
- Expose health check endpoints
Secure Data at Rest and in Transit20%- Implement security policies
- Manage keys and certificates
- Manage secure environment properties
- Expose and invoke APIs over HTTPS
Implement Maintainable and Modular Mule Applications and Maven Builds25%- Create reusable libraries
- Implement automated deployment
- Execute tests with Maven
- Build custom policies and processors
- Modularize applications and builds
Design and Implement API-led Connectivity13%- Implement HTTP callbacks/webhooks
- Implement API autodiscovery
- Implement server-side caching
Implement Performant and Reliable Mule Applications27%- Implement reliable messaging patterns
- Optimize performance and throughput
- Validate messages and payloads
- Use ObjectStore for persistence
- Handle HTTP API invocations and errors

>> Hot Mule-Dev-301 Questions <<

2026 Mule-Dev-301: The Best Hot Salesforce Certified MuleSoft Developer II Questions

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Salesforce Certified MuleSoft Developer II Sample Questions (Q28-Q33):

NEW QUESTION # 28
An API has been built to enable scheduling email provider. The front-end system does very little data entry validation, and problems have started to appear in the email that go to patients. A validate-customer'' flow is added validate the data.
What is he expected behavior of the 'validate-customer'' flow?

Answer: B

Explanation:
The validate-customer flow uses an until-successful scope to validate each field of the customer data. The until-successful scope executes its processors until they succeed or exhausts the maximum number of retries. If any processor fails, it raises an error and stops executing the remaining processors. Therefore, if only the email address is invalid, a VALIDATION.INVALID_EMAIL error is raised and the validation of appointment date and customer name is skipped. Reference: https://docs.mulesoft.com/mule-runtime/4.3/until-successful-scope


NEW QUESTION # 29
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:

Answer: A

Explanation:
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


NEW QUESTION # 30
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?

Answer: C


NEW QUESTION # 31
Refer to the exhibit.
What is the result if ''Insecure'' selected as part of the HTTP Listener configuration?

Answer: D

Explanation:
Based on the exhibit below, if 'Insecure' is selected as part of the HTTP Listener configuration, the HTTP listener will only accept HTTP requests. This means that no TLS context will be configured for this listener and no encryption or authentication will be applied to incoming requests. The protocol attribute of this listener will be set to HTTP instead of HTTPS. Reference: https://docs.mulesoft.com/http-connector/1.6/http-listener-ref#insecure


NEW QUESTION # 32
Refer to the exhibit.
A Mute Object Store is configured with an entry TTL of one second and an expiration interval of 30 seconds.
What is the result of the flow if processing between os'store and os:retrieve takes 10 seconds?

Answer: C

Explanation:
The result of the flow is nullPayload if processing between os:store and os:retrieve takes 10 seconds. This is because the entry TTL of the object store is one second, which means that any stored value expires after one second and is removed from the object store. The expiration interval of 30 seconds only determines how often the object store checks for expired values, but it does not affect the TTL. Therefore, when os:retrieve tries to get the value after 10 seconds, it returns nullPayload because the value has already expired and been removed. Reference: https://docs.mulesoft.com/object-store/osv2-faq#how-does-the-time-to-live-work


NEW QUESTION # 33
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