Mulesoft MuleSoft Certified Developer MCD-LEVEL-2 Questions & Answers

• Question 11:

  Refer to the exhibit.

  

  What is the result of the Mule Maven Plugin configuration of the value of property its,keystorePassoword in CloudHub 2.0?

  A. CloudHub encrypts the value

  B. The Mule server encrypts the value

  C. Anypoint Studio secures the value

  D. Runtime Manager masks the value

  Correct Answer: D

  The result of the Mule Maven Plugin configuration of the value of property its,keystorePassword in CloudHub 2.0 is that Runtime Manager masks the value. This means that Runtime Manager hides or obscures the value from anyone who views it in Runtime Manager or Anypoint Platform.

  References:https://docs.mulesoft.com/runtime-manager/runtime-manager-agent-for-mule4#properties-tab

• Question 12:

  A Flight Management System publishes gate change notification events whenever a flight's arrival gate changes. Other systems, including Baggage Handler System. Inflight Catering System and Passenger Notifications System, must each asynchronously receive the same gate change notification to process the event according.

  Which configuration is required in Anypoint MQ to achieve this publish/subscribe model?

  A. Publish each client subscribe directly to the exchange. Have each client subscribe directly to the queue.

  B. Publish the gate change notification to an Anypoint MC queue Have each client subscribe directly to the queue

  C. Publish the gate change notification to an Anypoint MQ queue. Create different anypoint MQ exchange meant for each of the other subscribing systems Bind the queue with each of the exchanges

  D. Publish the gate change notification to an Anypoint MQ exchanhe. Create different Anypoint MQ queues meant for each of the other subscribing systems. Bind the exchange with each of the queues.

  Correct Answer: D

  To achieve a publish/subscribe model using Anypoint MQ, where each system receives the same gate change notification event, the developer should publish the gate change notification to an Anypoint MQ exchange, create different Anypoint MQ queues meant for each of the other subscribing systems, and bind the exchange with each of the queues. An exchange is a message routing agent that can send messages to different queues based on predefined criteria. By binding an exchange with multiple queues, each queue receives a copy of every message sent to that exchange. Therefore, each system can subscribe to its own queue and receive every gate change notification event. References:https:// docs.mulesoft.com/anypoint-mq/3.x/anypoint-mq-exchanges

• Question 13:

  An API has been built to enable scheduling email provider. The front-end system does very little data entry validation, and problems have started to appear in the email that go to patients. A validate-customer'' flow is added validate the data.

  What is he expected behavior of the `validate-customer'' flow?

  

  A. If only the email address Is invalid a VALIDATION.INVALID_EMAIL error is raised

  B. If the email address is invalid, processing continues to see if the appointment data and customer name are also invalid

  C. If the appointment date and customer name are invalid, a SCHEDULE:INVALID_APPOINTMENT_DATE error is raised

  D. If all of the values are invalid the last validation error is raised:SCHEDULE:INVALID_CUSTOMER_NAME

  Correct Answer: A

  The validate-customer flow uses an until-successful scope to validate each field of the customer data. The until-successful scope executes its processors until they succeed or exhausts the maximum number of retries. If any processor fails, it raises an error and stops executing the remaining processors. Therefore, if only the email address is invalid, a VALIDATION.INVALID_EMAIL error is raised and the validation of appointment date and customer name is skipped.

  References:https://docs.mulesoft.com/mule-runtime/4.3/until-successful-scope

• Question 14:

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

  A. Write-through invalidation

  B. White-behind invalidation

  C. Time to live

  D. Notification-based invalidation

  Correct Answer: C

  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

• Question 15:

  Refer to the exhibit.

  What required changes can be made to give a partial successful response in case the United Airlines API returns with a timeout?

  

  A. Add a Scatter-gather component inside a Try scope. Set the payload to a default value `Error' inside the error handler using the On Error Propagate scope.

  B. Add Flow Reference components inside a Try scope. Set the payload to a default value'' insider the error handler using the ON Error Continue scope

  C. Add Flow Reference components inside a Try scope Set the payload to a default value `' inside the error handler using the On Error Propagate scope

  D. Add a Scatter-Gather component inside a Try scope. Set the payload to a default value `Error'' inside the error handler using the On Error Continue scope.

  Correct Answer: D

  To give a partial successful response in case the United Airlines API returns with a timeout, the developer should add a Scatter-Gather component inside a Try scope, and set the payload to a default value `Error' inside the error handler using the On Error Continue scope. A Scatter-Gather component allows sending multiple requests concurrently and aggregating the responses into an array. A Try scope allows handling errors that occur within it using an error handler. An On Error Continue scope allows continuing the flow execution after handling an error. Therefore, by using these components, the developer can send requests to both APIs in parallel, handle any timeout errors from United Airlines API, and return a partial response with a default value for that API. References: https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-concept https://docs.mulesoft.com/mule-runtime/4.3/try-scope-concept https://docs.mulesoft.com/mule-runtime/4.3/on-error-continue-concept

• Question 16:

  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

  Correct Answer: C

  When the HTTP Request operation raises an HTTP CONNECTIVITY error, it triggers an on-error-continue handler that sets a payload with `Error in processing your request'. Since no status code is explicitly set in this handler, it defaults to 500 (INTERNAL SERVER ERROR). Therefore, the web client receives an HTTP response with status code 500 and body `Error in processing your request'. References:https://docs.mulesoft.com/mule-runtime/4.3/error-handling#on-error-continue

• Question 17:

  Refer to the exhibits.

  Bioinfo System API is implemented and published to Anypoint Exchange. A developer wants to invoke this API using its REST Connector.

  What should be added to the POM?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: E

  To invoke Bioinfo System API using its REST Connector, option E should be added to the pom.xml file. This option adds a dependency for Bioinfo System API REST Connector with its group ID, artifact ID, version, classifier, and type. The classifier specifies that it is a REST Connector (raml-client), and the type specifies that it is a Mule plugin (mule-plugin). References:https://docs.mulesoft.com/apikit/4.x/apikit-4-generate-from-rest-api-task#add-the-api-dependency-to-thepom-file

• Question 18:

  Multiple individual Mute application need to use the Mule Maven plugin to deploy to CloudHub.

  The plugin configuration should .. reused where necessary and anything project,specific should be property-based.

  Where should the Mule Maven details be configured?

  A. A parent pom.xml

  B. Settings, xml

  C. Pom, xml

  D. A Bill of Materials (BOM) parent pm

  Correct Answer: A

  To reuse Mule Maven plugin configuration across multiple individual Mule applications, the developer should use a parent pom.xml file. A parent pom.xml file defines common configuration for one or more child projects that inherit from it. The developer can specify common properties and dependencies for all child projects in the parent pom.xml file, such as Mule Maven plugin configuration, and then reference them in each child project's pom.xml file using placeholders. References: https://docs.mulesoft.com/mule-runtime/4.3/mmp-concept#parent-pom https://maven.apache.org/guides/introduction/introduction-to-the-pom.html#Project_Inheritance

• Question 19:

  Mule application A is deployed to CloudHub and is using Object Store v2. Mute application B is also deployed to CloudHub.

  Which approach can Mule application B use to remove values from Mule application A'S Object Store?

  A. Object Storev2 REST API

  B. CloudHub Connector

  C. Object Store Connector

  D. CloudHub REST API

  Correct Answer: A

  To remove values from Mule application A's Object Store v2, Mule application B can use Object Store v2 REST API. This API allows performing operations on Object Store v2 resources using HTTP methods, such as GET, POST, PUT, and DELETE. Mule application B can use the DELETEmethod to remove values from Mule application A's Object Store v2 by specifying the object store ID and the key of the value to delete. References:https://docs.mulesoft.com/object-store/ osv2-apis

• Question 20:

  A company deploys 10 public APIs to CloudHub. Each API has its individual health endpoint defined. The platform operation team wants to configure API Functional Monitoring to monitor the health of the APIs periodically while minimizing operational overhead and cost.

  How should API Functional Monitoring be configured?

  A. From one public location with each API in its own schedule

  B. From one private location with all 10 APIs in a single schedule

  C. From one public location with all 10 APIs in a single schedule

  D. From 10 public locations with each API in its own schedule

  Correct Answer: C

  To configure API Functional Monitoring to monitor the health of 10 public APIs periodically while minimizing operational overhead and cost, the developer should use one public locationwith all 10 APIs in a single schedule. A public location is a worker that runs in a CloudHub shared environment, which is cheaper and easier to maintain than a private location. A single schedule allows running all 10 APIs tests at the same time and frequency, which reduces complexity and resource consumption. References:https://docs.mulesoft.com/functional-monitoring/fm-create-monitor#create-a-monitor