Question # 1
Which pattern should be used to invoke multiple HTTP APIs in parallel and roll back failed requests in sequence? | A. A database as a transactional outbox and an Until Successful router to retry any requests | B. A Parallel for Each scope with each HTTP request wrapped in a Try scope | C. Scatter-Gather as central Saga orchestrator for all API request with compensating actions for failing routes | D. VM queues as a reliability pattern with error handlers to roll back any requests |
C. Scatter-Gather as central Saga orchestrator for all API request with compensating actions for failing routes
Explanation: To invoke multiple HTTP APIs in parallel and roll back failed requests in sequence, the developer should use a Scatter-Gather router as a central Saga orchestrator for all API requests with compensating actions for failing routes. A Scatter-Gather router executes multiple routes concurrently and aggregates the results. A Saga orchestrator coordinates a series of actions across different services and handles failures by executing compensating actions. Therefore, using a Scatter-Gather router as a Saga orchestrator allows invoking multiple HTTP APIs in parallel and rolling back any failed requests in sequence.
References: https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-concept https://docs.mulesoft.com/mule-runtime/4.3/saga
Question # 2
What is the MuleSoft recommended method to encrypt sensitive property data? | A. The encryption key and sensitive data should be different for each environment | B. The encryption key should be identical for all environments | C. The encryption key should be identical for all environments and the sensitive data should be different for each environment | D. The encryption key should be different for each environment and the sensitive data should be the same for all environments |
A. The encryption key and sensitive data should be different for each environment
Explanation: The MuleSoft recommended method to encrypt sensitive property data is to use the Secure Properties Tool that comes with Anypoint Studio. This tool allows encrypting properties files with a secret key and then decrypting them at runtime using the same key. The encryption key and sensitive data should be different for each environment to ensure security and avoid accidental exposure of sensitive data.
References: https://docs.mulesoft.com/mule-runtime/4.3/secure-configuration-properties
Question # 3
A Mule application uses API autodiscovery to access and enforce policies for a RESTful implementation. | A. Northing because flowRef is an optional attribute which can be passed runtime | B. The name of the flow that has APlkit Console to receive all incoming RESTful operation requests. | C. Any of the APIkit generate implement flows | D. The name of the flow that has HTTP listener to receive all incoming RESTful operation requests |
D. The name of the flow that has HTTP listener to receive all incoming RESTful operation requests
Explanation: To use API autodiscovery to access and enforce policies for a RESTful implementation, flowRef must be set to the name of the flow that has HTTP listener to receive all incoming RESTful operation requests. This way, API autodiscovery can identify the API implementation and associate it with the corresponding API specification and policies in API Manager. The flow that has HTTP listener is usually the main flow that contains the APIKit Router.
References: https://docs.mulesoft.com/api-manager/2.x/api-auto-discovery-new-concept#flowref
Question # 4
API response is slow, so the developer reconfigures the API so that the out-of-the-box HTTP Caching policy is applied first, and the OAuth API policy is applied second. What will happen when an HTTP request is received? | A. In case of a cache hit, both the OAuth and HTTP Caching policies are evaluated; then the cached response is returned to the caller | B. In case of a cache it, only the HTTP Caching policy is evaluating; then the cached response is returned to the caller | C. In case of a cache miss, only the HTTP Caching policy is evaluated; then the API retrieves the data from the API implementation, and the policy stores the data to be cached in Object Store | D. In case of a cache miss, both the OAuth and HTTP Caching policies are evaluated; then the API retrieves the data from the API implementation, and the policy does not store the data in Object Store |
B. In case of a cache it, only the HTTP Caching policy is evaluating; then the cached response is returned to the caller
Explanation: When an HTTP request is received and the HTTP Caching policy is applied first, it checks if there is a cached response for that request in Object Store. If there is a cache hit, meaning that a valid cached response exists, then only the HTTP Caching policy is evaluated and the cached response is returned to the caller without invoking the OAuth policy or the API implementation. If there is a cache miss, meaning that no valid cached response exists, then both the HTTP Caching policy and the OAuth policy are evaluated before invoking the API implementation.
References: https://docs.mulesoft.com/api-manager/2.x/http-caching-policy#policy-ordering
Question # 5
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 Store v2 REST API | B. CloudHub Connector | C. Object Store Connector | D. CloudHub REST API |
A. Object Store v2 REST API
Explanation 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 DELETE method 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 # 6
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? | A. 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. | B. Create a common-global-error-handler flow in all Mule Applications Refer to it flow-ref wherever needed. | C. 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 | D. Create a Mule daman project. Create a common-global-error-handler flow inside the domain project. Use this domain project as a dependency. |
C. 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
Question # 7
An order processing system is composed of multiple Mule application responsible for warehouse, sales and shipping. Each application communication usingAnypoint MQ. Each message must be correlated against the original order ID for observability and tracing.
How should a developer propagate the order ID as the correlation ID across each message? | A. Use the underlying HTTP request of Anypoint MQ to set the‘X-CORRELATION_ID’ header to the orderID | B. Set a custom Anypoint MQ user propertyto propagate the order ID and set the correlation ID in the receiving applications. | C. Use the default correlation ID, Anypoint MQ will sutomatically propagate it. | D. Wrap all Anypoint MQ Publish operations within a With CorrelationID scope from the Tracing module, setting the correlation ID to the order ID |
D. Wrap all Anypoint MQ Publish operations within a With CorrelationID scope from the Tracing module, setting the correlation ID to the order ID
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FAQs of MCD-Level-2 Exam
What topics are covered in the MuleSoft MCD-Level-2 Exam?
The MCD-Level-2 exam covers a range of topics including designing and building APIs, implementing and managing APIs, app development with Anypoint Platform™, data transformation and logic, and troubleshooting. This ensures a comprehensive understanding of MuleSoft tools and practices.
Who is the target audience for the MuleSoft MCD-Level-2 Exam?
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The duration of the MCD-Level-2 exam is set to ensure candidates have adequate time to thoroughly answer all questions. The MuleSoft MCD-Level-2 exam duration is 120 minutes. For More Information visit: https://training.mulesoft.com/certification/developer-mule4-level2
What is the passing score for the MuleSoft MCD-Level-2 Exam?
To pass the MCD-Level-2 exam, candidates must achieve a
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