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Salesforce Salesforce MuleSoft Mule-Dev-301

Mule-Dev-301

Exam Code: Mule-Dev-301

Exam Name: Salesforce Certified MuleSoft Developer II

Updated: Aug 28, 2026

Q & A: 62 Questions and Answers

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Salesforce Mule-Dev-301 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Design and Implement API-led Connectivity13%- Implement API autodiscovery
- Implement server-side caching
- Implement HTTP callbacks/webhooks
Topic 2: Implement Maintainable and Modular Mule Applications and Maven Builds25%- Execute tests with Maven
- Build custom policies and processors
- Create reusable libraries
- Implement automated deployment
- Modularize applications and builds
Topic 3: Implement Performant and Reliable Mule Applications27%- Validate messages and payloads
- Use ObjectStore for persistence
- Handle HTTP API invocations and errors
- Implement reliable messaging patterns
- Optimize performance and throughput
Topic 4: Implement Monitorable Mule Applications15%- Implement logging and log management
- Implement message correlation
- Expose health check endpoints
- Monitor applications and runtimes
Topic 5: Secure Data at Rest and in Transit20%- Manage secure environment properties
- Manage keys and certificates
- Expose and invoke APIs over HTTPS
- Implement security policies

Salesforce Certified MuleSoft Developer II Sample Questions:

1. 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) XML template file, YAML configuration file
B) Deployable ZIP file, YAML configuration file
C) JSON properties file, XML template file
D) JSON properties file, YAML configuration file


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


3. A Mule API receives a JSON payload and updates the target system with the payload. The developer uses JSON schemas to ensure the data is valid.
How can the data be validation before posting to the target system?

A) Use a DataWeave 2.09 transform operation, and at the log of the DataWeave script, add:
%dw 2.0
Import.json-moduls
B) Apply the JSON Schema policy in API Manager and reference the correct schema in the policy configuration
C) Using the DataWeave if Else condition test the values of the payload against the examples included in the schema
D) Add the JSON module dependency and add the validate-schema operation in the flow, configured to reference the schema


4. The HTTP Request operation raises an HTTP CONNECTIVITY error.
Which HTTP status code and body are returned to the web client?

A) HTTP Status Code:200.
Body 'Error in processing your request
B) HTTP Status Code:500.
Body 'The HTTP CONNECTIVITY Error description
C) HTTP Status Code:500.
Body 'Error in processing your request
D) HTTP Status Code:500.
Body 'Error in processing your request


5. An order processing system is composed of multiple Mule application responsible for warehouse, sales and shipping. Each application communication using Anypoint MQ. Each message must be correlated against the original order ID for observability and tracing.
How should a developer propagate the order ID as the correlation ID across each message?

A) Use the default correlation ID, Anypoint MQ will sutomatically propagate it.
B) Wrap all Anypoint MQ Publish operations within a With CorrelationID scope from the Tracing module, setting the correlation ID to the order ID
C) Use the underlying HTTP request of Anypoint MQ to set the 'X-CORRELATION_ID' header to the order ID
D) Set a custom Anypoint MQ user property to propagate the order ID and set the correlation ID in the receiving applications.


Solutions:

Question # 1
Answer: A
Question # 2
Answer: C
Question # 3
Answer: D
Question # 4
Answer: D
Question # 5
Answer: B

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