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MuleSoft Certified Developer - Level 2 (Mule 4) Sample Questions:

1. A Mule application deployed to a standardalone Mule runtime uses VM queues to publish messages to be consumed asynchronously by another flow.
In the case of a system failure, what will happen to in-flight messages in the VM queues that have been consumed?

A) For any type of queue, the message will be lost
B) For transient queues, the message will be processed after the system comes online
C) For persistent queues, the message will be processed after the system comes online
D) For nay type of queue, the message will be processed after the system comes online

2. A Mule implementation uses a HTTP Request within an Unit Successful scope to connect to an API.
How should a permanent error response like HTTP:UNAUTHORIZED be handle inside Until Successful to reduce latency?

A) Put the HTTP Request inside a try scope in Unit Successful.
In the error handler, use On Error Propagate to catch permanent errors like HTTP UNAUTHORIZED.
B) Put the HTTP Request inside a try scope in Unit Successful.
In the error handler, use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED.
C) Configure retrying until a MULERETRY_EXHAUSTED error is raised or the API responds back with a successful response.
D) In Until Successful configuration, set the retry count to 1 for error type HTTP: UNAUTHORIZED.

3. A Mule application includes a subflow containing a Scatter.Gather scope. Within each log of the Scatter.Gatter. an HTTP connector calls a PUT endpoint to modify records in different upstream system. The subflow is called inside an Unit successful scope to retry if a transitory exception is raised.
A technical spike is being performed to increase reliability of the Mule application.
Which steps should be performed within the Mule flow above the ensure idempontent behavior?

A) None, the flow already exhibits idempotent behavior
B) Remove the Put requests from the Scatter-Getter and perform them sequentially
C) Change the PUT requests inside the Scatter-Gather to POST requests
D) Ensure an error-handling flow performs corrective actions to roll back all changes if any leg of the Scatter-Gather fails

4. Which plugin or dependency is required to unit test modules created with XML SDK?

A) XMLUnit
B) MUnit Maven plugin
C) Junit
D) MUnit Extensions Maven plugin

5. When implementing a synchronous API where the event source is an HTTP Listener, a developer needs to return the same correlation ID back to the caller in the HTTP response header.
How can this be achieved?

A) Configure a custom correlation policy
B) Enable the auto-generate CorrelationID option when scaffolding the flow
C) Enable the CorrelationID checkbox in the HTTP Listener configuration
D) NO action is needed as the correlation ID is returned to the caller in the response header by default

Solutions: