MuleSoft MCD-Level-1 Questions Answers
MuleSoft Certified Developer - Level 1 (Mule 4)- 235 Questions & Answers
- Update Date : May 18, 2026
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Related Exams
MuleSoft MCD-Level-1 Sample Questions
Question # 1A function named newProdCode needs to be defined thataccepts two input parameters, an integer value for itemID and a string value for productCategory, and returns a new product code.What is the correct DataWeave code to define the newProdCode function?
A. fun newProdCode{itemID: Number, productCategory: String) —> "PC-" ++ productCategory ++ (itemID as String)
B. fun newProdCode(itemID: Number, productCategory: String) = "PC-" ++productCategory ++ (itemID as String)
C. function newProdCode(itemID: Number, productCategory: String) ="PC-" ++ productCategory++ (itemID as String)
D. var newProdCode(itemID: Number, productCategory: String) ->"PC-" ++ productCategory ++ (itemID as String)
Question # 2
A web client submits a request tohttp://localhost:8081/books/0471767840. The value"0471767840" is captured by a Set Variable transformer to a variable named booklSBN.What is the DataWeave expression to access booklSBN later in the flow?
A. booklSBN
B. attributes.booklSBN
C. flowVars.booklSBN
D. vars. booklSBN
Question # 3
Why would a Muleapplication use the ${http.port} property placeholder for its HTTPListener port when it is deployed to CloudHub?
A. Allows CloudHub to automatically change the HTTP port to allow external clients to connect to the HTTP Listener
B. Allows CloudHub to automatically register the application with API Manager
C. Allows MuleSoft Support to troubleshoot the application by connecting directly to the HTTP Listener
D. Allows clients to VPN directly to the application at the Mule application's configured HTTP port
Question # 4
What is the output type of the DataWeave map operator?
A. String
B. Array
C. Map
D. Object
Question # 5
A web client submits a request to http://localhost:8081?accountType=personal. The query parameter is captured using a Set Variable transformer to a variable named accountType.What is the correct DataWeave expression to log accountType?
A. Account Type: #[flowVars.accountType]
B. Account Type: #[message.inboundProperties.accountType]
C. Account Type: # [attributes.accountType]
D. Account Type: #[vars.accountType]
Question # 6
A Database On Table Row listener retrieves data from a CUSTOMER table that contains a primary key userjd column and an increasing kxjin_date_time column. Neither columnallows duplicate values.How should the listener be configured so it retrieves each row at most one time?
A. Set the watermark column to the bgin_date_time column
B. Set the target value to the last retrieved login_date_time value
C. Set the target value to the last retrieved user_jd value
D. Set the watermark column to the user_Id column
Question # 7
An HTTP Request operation sends an HTTP request with a non-empty JSON object payload to an external HTTP endpoint.The response from the external HTTP endpoint returns an XML body. The result is stored in a target named the Result.What is the payload at the event processor after the HTTP Request?
A. The XML response body
B. null
C. The original JSON request body
D. Anon-empty Java object
Question # 8
In an application network. If the implementation but not the interface of a product API changes, what needs to be done to the other APIs that consume the product API?
A. The applicationsassociated with the other APIs must be restarted
B. The applications associated with the other APIs must be recoded
C. The other APIs must be updated to consume the updated product API
D. Nothing needs to be changed in the other APIs or their associated applications
Question # 9
A Mule application contains a global error handler configured tocatch any errors.Where must the global error handler be specified so that the global error handler catches all errors from flows without their own error handlers?
A. A configuration properties file
B. Nowhere, the global error handler is automatically used
C. A global element
D. The pom.xml file
Question # 10
A web client sends a request to http;//localhost:8081?dept=sales. What is the correct DataWeave expression to access the value of dept?
A. attributes.queryParams.dept
B. attributes.dept
C. message.queryParams.dept
D. vars.dept
Question # 11
A web client submits a request to http://localhost:8081?flrstName=john. What is the correctDataWeave expression to access the firstName parameter?
A. #[attributes.queryParams.firstName]
B. #[message.queryParams.hrstName]
C. #[message.inboundProperties.'http.query.params'.firstName]
D. #[attributes.'http.query.params'.firstName]
Question # 12
An On Table Row Database listener retrieves data from a table that contains record_id, an increasing numerical column.How should the listener be configured so it retrieves new rows at most one time?
A. Set the target tostore the last retrieved record_id value
B. Set the ObjectStore to store the last retrieved record_id value
C. Set the target to the record_id column
D. Set the watermark column to the record id column
Question # 13
By default, what happens to a file after it is read using an FTP connector Read operation?
A. The file is deleted from the folder
B. The file is moved to a different folder
C. The file stays in the same folder unchanged
D. The file is renamed in the same folder
Question # 14
An API specification is designed using RAML. What is the next step to create a REST Connector from this API specification?
A. Download the API specification and build the interface using APIkit
B. Publish the API specification to Any pointExchange
C. Implement the API specification using flow designer in Design Center
D. Add the specification to a Mule project's src/main/resources/api folder
Question # 15
A flow needs to combine and return data from two different data sources. It contains a Database SELECT operation followed by an HTTP Request operation.What is the method to capture both payloads so the payload from the second request does not overwrite that fromthe first?
A. Put the Database SELECT operation inside a Cache scope
B. Put the Database SELECT operation inside a Message Enricher scope
C. Nothing, previous payloads are combined into the next payload
D. Save the payload from the Database SELECT operation to a variable