Mulesoft MCIA-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCIA-LEVEL1 Online Questions & Answers

• Question 131:

  Which Mule component is best suited for processing very large datasets asynchronously?

  A. Flow reference
  B. Cache scope
  C. Batch Job
  D. VM connector
  C. Batch Job

  ---

  Batch Jobs are designed for high-volume, asynchronous processing of large datasets in Mule applications.

• Question 132:

  An integration team follows MuleSoft's recommended approach to full lifecycle API development.

  Which activity should this team perform during the API implementation phase?

  A. Validate the API specification
  B. Use the API specification to build the MuleSoft application
  C. Design the API specification
  D. Use the API specification to monitor the MuleSoft application
  B. Use the API specification to build the MuleSoft application

• Question 133:

  An external API frequently invokes an Employees System API to fetch employee data from a MySQL database. The architect must design a caching strategy to query the database only when there Is an update to the Employees table or else return a cached response in order to minimize the number of redundant transactions being handled by the database.

  A. Use an On Table Row operation configured with the Employees table, call invalidate cache, and hardcode the new Employees data to cache. Use an object-store-caching-strategy and set the expiration interval to 1 hour.
  B. Use an On Table Row operation configured with the Employees table and cail invalidate cache. Use an object-store-caching-strategy and the default expiration interval.
  C. Use a Scheduler with a fixed frequency set to every hour to trigger an invalidate cache flow. Use an object-store-caching-strategy and the default expiration interval.
  D. Use a Scheduler with a fixed frequency set to every hour, triggering an invalidate cache flow. Use an object-store-caching-strategy and set the expiration interval to 1 hour.
  B. Use an On Table Row operation configured with the Employees table and cail invalidate cache. Use an object-store-caching-strategy and the default expiration interval.

  ---

  To design a caching strategy that queries the database only when there is an update to the Employees table, follow these steps:

  On Table Row Operation: Configure an On Table Row operation to monitor the Employees table for updates.

  Invalidate Cache: When the On Table Row operation detects an update, trigger the invalidate cache operation to clear the cache.

  Object Store Caching Strategy: Use an object-store-caching-strategy to store the cached responses.

  Default Expiration Interval: Use the default expiration interval for the cache, which ensures that cached data is invalidated based on the detection of changes in the Employees table rather than a fixed time interval.

  This strategy ensures that the cache is only invalidated when there are actual changes in the Employees table, thereby minimizing redundant transactions and optimizing database performance.

  References

  MuleSoft Documentation on Caching Strategies Best Practices for Database Integration with MuleSoft

• Question 134:

  According to MuleSoft, what Action should an IT organization take regarding its technology assets in order to close the IT delivery.

  A. Make assets easily discoverable via a central repository
  B. Focus project delivery efforts on custom assets that meet the specific requirements of each individual line of business
  C. Create weekly meetings that all members of IT attend to present justification and request approval to use existing assets
  D. Hire additional staff to meet the demand for asset creation required for approved projects and timelines
  B. Focus project delivery efforts on custom assets that meet the specific requirements of each individual line of business

• Question 135:

  A Mule application contains a Batch Job scope with several Batch Step scopes. The Batch Job scope is configured with a batch block size of 25.

  A payload with 4,000 records is received by the Batch Job scope.

  When there are no errors, how does the Batch Job scope process records within and between the Batch Step scopes?

  A. The Batch Job scope processes multiple record blocks in parallel, and a block of 25 records can jump ahead to the next Batch Step scope over an earlier block of records Each Batch Step scope is invoked with one record in the payload of the received Mule event For each Batch Step scope, all 25 records within a block are processed in parallel All the records in a block must be completed before the block of 25 records is available to the next Batch Step scope
  B. The Batch Job scope processes each record block sequentially, one at a time Each Batch Step scope is invoked with one record in the payload of the received Mule event For each Batch Step scope, all 25 records within a block are processed sequentially, one at a time All 4000 records must be completed before the blocks of records are available to the next Batch Step scope
  C. The Batch Job scope processes multiple record blocks in parallel, and a block of 25 records can jump ahead to the next Batch Step scope over an earlier block of records Each Batch Step scope is invoked with one record in the payload of the received Mule event For each Batch Step scope, all 25 records within a block are processed sequentially, one record at a time All the records in a block must be completed before the block of 25 records is available to the next Batch Step scope
  D. The Batch Job scope processes multiple record blocks in parallel Each Batch Step scope is invoked with a batch of 25 records in the payload of the received Mule event For each Batch Step scope, all 4000 records are processed in parallel Individual records can jump ahead to the next Batch Step scope before the rest of the records finish processing in the current Batch Step scope
  A. The Batch Job scope processes multiple record blocks in parallel, and a block of 25 records can jump ahead to the next Batch Step scope over an earlier block of records Each Batch Step scope is invoked with one record in the payload of the received Mule event For each Batch Step scope, all 25 records within a block are processed in parallel All the records in a block must be completed before the block of 25 records is available to the next Batch Step scope

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  https://docs.mulesoft.com/mule-runtime/4.4/batch-processing-concept

• Question 136:

  What is true about automating interactions with Anypoint Platform using tools such as Anypoint Platform REST API's, Anypoint CLI or the Mule Maven plugin?

  A. By default, the Anypoint CLI and Mule Maven plugin are not included in the Mule runtime
  B. Access to Anypoint Platform API;s and Anypoint CLI can be controlled separately thruough the roles and permissions in Anypoint platform, so that specific users can get access to Anypoint CLI while others get access to the platform API's
  C. Anypoint Platform API's can only automate interactions with CloudHub while the Mule maven plugin is required for deployment to customer hosted Mule runtimes
  D. API policies can be applied to the Anypoint platform API's so that only certain LOS's has access to specific functions
  A. By default, the Anypoint CLI and Mule Maven plugin are not included in the Mule runtime

  ---

  Correct answer is By default, the Anypoint CLI and Mule Maven plugin are not included in the Mule runtime Maven is not part of runtime though it is part of studio. You do not need it to deploy in order to deploy your app. Same is the case with CLI.

• Question 137:

  An organization is designing an integration Mule application to process orders by submitting them to a back-end system for offline processing. Each order will be received by the Mule application through an HTTPS POST and must be acknowledged immediately. Once acknowledged, the order will be submitted to a back-end system. Orders that cannot be successfully submitted due to rejections from the back-end system will need to be processed manually (outside the back-end system).

  The Mule application will be deployed to a customer-hosted runtime and is able to use an existing ActiveMQ broker if needed. The ActiveMQ broker is located inside the organization's firewall. The back-end system has a track record of unreliability due to both minor network connectivity issues and longer outages.

  What idiomatic (used for their intended purposes) combination of Mule application components and ActiveMQ queues are required to ensure automatic submission of orders to the back-end system while supporting but minimizing manual order processing?

  A. An Until Successful scope to call the back-end system One or more ActiveMQ long-retry queues One or more ActiveMQ dead-letter queues for manual processing
  B. One or more On Error scopes to assist calling the back-end system An Until Successful scope containing VM components for long retries A persistent dead-letter VM queue configured in CloudHub
  C. One or more On Error scopes to assist calling the back-end system One or more ActiveMQ long-retry queues A persistent dead-letter object store configured in the CloudHub Object Store service
  D. A Batch Job scope to call the back-end system An Until Successful scope containing Object Store components for long retries A dead-letter object store configured in the Mule application
  A. An Until Successful scope to call the back-end system One or more ActiveMQ long-retry queues One or more ActiveMQ dead-letter queues for manual processing

• Question 138:

  A Mule application uses the Database connector.

  What condition can the Mule application automatically adjust to or recover from without needing to restart or redeploy the Mule application?

  A. One of the stored procedures being called by the Mule application has been renamed
  B. The database server was unavailable for four hours due to a major outage but is now fully operational again
  C. The credentials for accessing the database have been updated and the previous credentials are no longer valid
  D. The database server has been updated and hence the database driver library/JAR needs a minor version upgrade
  B. The database server was unavailable for four hours due to a major outage but is now fully operational again

  ---

  # Any change in the application will require a restart except when the issue outside the app. For below situations , you would need to redeploy the code after doing necessary changes -- One of the stored procedures being called by the Mule application has been renamed. In this case, in the Mule application you will have to do changes to accommodate the new stored procedure name.

  -- Required redesign of Mule applications to follow microservice architecture principles. As code is changed, deployment is must

  -- If the credentials changed and you need to update the connector or the properties.

  -- The credentials for accessing the database have been updated and the previous credentials are no longer valid. In this situation you need to restart or redeploy depending on how credentials are configured in Mule application.

  # So Correct answer is The database server was unavailable for four hours due to a major outage but is now fully operational again as this is the only external issue to application.

• Question 139:

  A system API EmployeeSAPI is used to fetch employee's data from an underlying SQL database.

  The architect must design a caching strategy to query the database only when there is an update to the employees stable or else return a cached response in order to minimize the number of redundant transactions being handled by the database.

  What must the architect do to achieve the caching objective?

  A. Use an On Table Row on employees table and call invalidate cache Use an object store caching strategy and expiration interval to empty
  B. Use a Scheduler with a fixed frequency every hour triggering an invalidate cache flow Use an object store caching strategy and expiration interval to empty
  C. Use a Scheduler with a fixed frequency every hour triggering an invalidate cache flow Use an object store caching strategy and set expiration interval to 1-hour
  D. Use an on table rule on employees table call invalidate cache and said new employees data to cache Use an object store caching strategy and set expiration interval to 1-hour
  A. Use an On Table Row on employees table and call invalidate cache Use an object store caching strategy and expiration interval to empty

• Question 140:

  A project team is working on an API implementation using the RAML definition as a starting point. The team has updated the definition to include new operations and has published a new version to exchange. Meanwhile another team is working on a mule application consuming the same API implementation. During the development what has to be performed by the mule application team to take advantage of the newly added operations?

  A. Scaffold the client application with the new definition
  B. Scaffold API implementation application with the new definition
  C. Update the REST connector from exchange in the client application
  D. Update the API connector in the API implementation and publish to exchange
  C. Update the REST connector from exchange in the client application