MuleSoft MCD-Level-2 Exam Questions


Vendor Name: MuleSoft
Certification Name:MuleSoft Certified Developer
Exam Name:MuleSoft Certified Developer - Level 2 (Mule 4)

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MCD-Level-2 Exam Sample Questions:



An organization uses CloudHub to deploy all of its applications. How can a common-global-handler flow be configured so that it can be reused across all of the organization’s deployed applications?

 

Create a Mule plugin project
Create a common-global-error-handler flow inside the plugin project.
Use this plugin as a dependency in all Mute applications.
Import that configuration file in Mute applications.

 

Create a common-global-error-handler flow in all Mule Applications Refer to it flow-ref wherever needed.

 

Create a Mule Plugin project
Create a common-global-error-handler flow inside the plugin project.
Use this plugin as a dependency in all Mule applications

 

Create a Mule daman project.
Create a common-global-error-handler flow inside the domain project.
Use this domain project as a dependency.


Create a Mule Plugin project
Create a common-global-error-handler flow inside the plugin project.
Use this plugin as a dependency in all Mule applications


Explanation:
To configure a common-global-handler flow that can be reused across all of the organization’s deployed applications, the developer should create a Mule Plugin project, create a common-global-error-handler flow inside the plugin project, and use this plugin as a dependency in all Mule applications. This way, the developer can import the common-global-error-handler flow in any application that needs it and avoid duplicating the error handling logic. 

References:
https://docs.mulesoft.com/mule-runtime/4.3/error-handling#global-error-handler





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?

 

For nay type of queue, the message will be processed after the system comes online

 

For persistent queues, the message will be processed after the system comes online

 

For transient queues, the message will be processed after the system comes online

 

For any type of queue, the message will be lost


For persistent queues, the message will be processed after the system comes online


Explanation:
In case of a system failure, in-flight messages in persistent VM queues that have been consumed will be processed after the system comes online. This is because persistent VM queues store messages on disk and guarantee delivery even if there is a system crash or restart. Therefore, any in-flight messages that have been consumed but not processed will be recovered from disk and processed when the system is back online.

References:
https://docs.mulesoft.com/mule-runtime/4.3/vm-connector#persistent-queues





Which statement is true when using XML SDK for creating custom message processors?

 

Properties are fields defined by an end user of the XML SDK component and serve as a global configuration for the entire Mule project in which they are used

 

An XML SDK provides both inbound and outbound operations

 

Operations can be reused in recursive calls

 

All operations are public


All operations are public


Explanation:
When using XML SDK for creating custom message processors, all operations are public by default and can be used by any Mule application that imports them. There is no way to make an operation private or protected in XML SDK.

References: https://docs.mulesoft.com/mule-sdk/1.1/xml-sdk#operations





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?

 

Configure retrying until a MULERETRY_EXHAUSTED error is raised or the API responds back with a successful response.

 

In Until Successful configuration, set the retry count to 1 for error type HTTP: UNAUTHORIZED.

 

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.

 

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.


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.


Explanation:
To handle a permanent error response like HTTP:UNAUTHORIZED inside Until Successful, the developer should put the HTTP Request inside a try scope in Unit Successful, and use On Error Continue to catch permanent errors like HTTP UNAUTHORIZED in the error handler. This way, the developer can avoid retrying requests that will always fail due to a permanent error, and reduce latency. On Error Continue allows the flow to continue processing after handling the error.

References:
https://docs.mulesoft.com/mule-runtime/4.3/until-successful-scope
https://docs.mulesoft.com/mule-runtime/4.3/on-error-continue-concept





Which type of cache invalidation does the Cache scope support without having to write any additional code?

 

Write-through invalidation

 

White-behind invalidation

 

Time to live

 

Notification-based invalidation


Time to live


The Cache scope supports time to live (TTL) as a cache invalidation strategy without having to write any additional code. TTL specifies how long the cached response is valid before it expires and needs to be refreshed. The Cache scope also supports custom invalidation strategies using MEL or DataWeave expressions.

References: https://docs.mulesoft.com/mule-runtime/4.3/cache-scope#cache_invalidation



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