Mule-Dev-201 Sample Questions & Answers
Free MuleSoft Developer practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.
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- Question 1Intermediate
Transforming Data with DataWeave · Data Transformation
An integration developer needs to transform an XML payload containing customer data into a JSON format. The source XML has a root element
Show answer & explanation
Correct answer: A
The multi-value selector
.*Customerretrieves all Customer elements as an array. Themapfunction then iterates over this array to transform each item into the target JSON structure. This is the correct way to handle repeated XML elements in DataWeave 2.0. - Question 2Advanced
Routing Events · Scatter-Gather
A financial application uses a
Scatter-Gatherrouter to send a loan application to three different banks simultaneously. If the second route fails with an error while the first and third routes succeed, what happens to the execution of the flow immediately after the Scatter-Gather scope?Show answer & explanation
Correct answer: C
In a Scatter-Gather router, if any route fails, the router catches the exception and, after all routes complete (or timeout), throws a
MULE:COMPOSITE_ROUTINGerror. The flow processing stops and transfers to the error handler, where the composite error object contains results from successful routes and exceptions from failed ones. - Question 3Intermediate
Using Connectors · HTTP Connector
You are developing a Mule application that consumes a third-party REST API. You need to configure the HTTP Request connector to include a dynamic 'Authorization' header in every call, where the value comes from a variable named
authToken. How should you configure this in the HTTP Request operation?Show answer & explanation
Correct answer: B
The Headers section of the HTTP Request configuration allows DataWeave expressions. Using
#[vars.authToken]dynamically retrieves the value from the Mule variable and assigns it to theAuthorizationheader key. - Question 4Intermediate
Processing Records · For Each Scope
A developer needs to iterate over a collection of 5,000 records. For each record, a call to an external API must be made. If one API call fails, the process should continue with the next record, but the failure must be logged. Which scope is best suited for this requirement?
Show answer & explanation
Correct answer: D
The
For Eachscope processes records sequentially. To ensure the loop continues after a failure, the processing logic inside the loop must be wrapped in aTryscope configured withOn Error Continue. This catches the error for that single iteration, logs it, and allows theFor Eachloop to proceed to the next record. - Question 5Beginner
Deploying and Managing APIs and Integrations · CloudHub Deployment
When deploying a Mule application to CloudHub, you need to ensure that a specific property
db.portis configured differently for the Production environment compared to the Sandbox environment. What is the recommended approach to achieve this?Show answer & explanation
Correct answer: D
CloudHub allows you to define environment-specific application properties in the Runtime Manager. These properties override any default values defined in the application's local property files, allowing for environment-specific configurations without changing code.
- Question 6Advanced
Handling Errors · Reliability Patterns
Case Study:
GlobalLogistics Corp is implementing a new shipment tracking API. The API receives a JSON payload with shipment details.
Requirement 1: The system must validate that the 'shipmentId' field exists and is not empty.
Requirement 2: It must then query an external SOAP web service to get the current status.
Requirement 3: Finally, it must transform the SOAP response into a simplified JSON format for the client.During testing, the SOAP service occasionally times out. The architect wants to ensure that temporary network glitches don't cause immediate failure for the client.
Which combination of components and scopes provides the most robust solution for Requirement 2?
Show answer & explanation
Correct answer: D
The
Until Successfulscope is designed to retry an operation that fails due to connectivity or timeout issues. Wrapping the SOAP call in this scope ensures that temporary network glitches are handled by retrying the request according to the configured policy before failing.
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