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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Implement Performant and Reliable Mule Applications | 27% | - Validate messages and payloads - Use ObjectStore for persistence - Optimize performance and throughput - Implement reliable messaging patterns - Handle HTTP API invocations and errors |
| Topic 2: Implement Monitorable Mule Applications | 15% | - Implement logging and log management - Expose health check endpoints - Implement message correlation - Monitor applications and runtimes |
| Topic 3: Design and Implement API-led Connectivity | 13% | - Implement API autodiscovery - Implement HTTP callbacks/webhooks - Implement server-side caching |
| Topic 4: Implement Maintainable and Modular Mule Applications and Maven Builds | 25% | - Implement automated deployment - Create reusable libraries - Modularize applications and builds - Execute tests with Maven - Build custom policies and processors |
| Topic 5: Secure Data at Rest and in Transit | 20% | - Manage secure environment properties - Implement security policies - Expose and invoke APIs over HTTPS - Manage keys and certificates |
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NEW QUESTION # 47
Refer to the exhibits.
The HTTP Request operation raises an HTTP:CONNECTIVITY error.
Which HTTP status code and body are returned to the web client?
Exhibit:
Answer: A
Explanation:
The HTTP Request raises HTTP:CONNECTIVITY, so processing moves to the flow's On Error Propagate handler. Inside that handler, the variable httpStatus is explicitly set to 200, and the payload is changed to
"Error in processing your request."
However, because the handler is On Error Propagate, the Mule event remains in an error state after the handler completes. Therefore, the HTTP Listener uses its configured Error Response, not its normal Response configuration.
The exhibit shows that the Error Response status code is:
#[vars.httpStatus]
and its body is explicitly:
output text/plain --- error.description
Consequently, the status code is 200 because the error handler assigned that value to vars.httpStatus, while the body comes from error.description, which contains the description of the HTTP:CONNECTIVITY error. The payload set inside the error handler is not the expression used by the listener's configured Error Response.
MuleSoft documents that unsuccessful listener executions use the error-response definition and that status, body, headers, and other fields can use flow variables and DataWeave expressions.
Reference topics: HTTP Listener Error Response; On Error Propagate; Mule error object; error.description; response status variables.
Official documentation: https://docs.mulesoft.com/http-connector/latest/http-listener-ref
NEW QUESTION # 48
A healthcare portal needs to validate the token that it sends to a Mule API. The developer plans to implement a custom policy using the HTTP Policy Transform Extension to match the token received in the header from the healthcare portal.
Which files does the developer need to create in order to package the custom policy?
Answer: C
Explanation:
For the Mule 4 custom-policy development model represented by this question, the policy's runtime behavior is implemented in an XML template, while the policy's configurable parameters and metadata are described in a YAML configuration file.
The XML template uses Mule's XML configuration language and policy-specific elements such as http-policy:
proxy, http-policy:source, http-policy:operation, and http-policy:execute-next. In this scenario, the developer can place the header-token inspection and validation behavior in this implementation layer. The accompanying YAML file exposes configurable policy parameters to API Manager and provides the metadata needed for policy configuration.
MuleSoft's custom-policy development reference identifies an XML template and YAML file as core policy project artifacts; the complete project additionally contains its POM, Mule artifact descriptor, and any optional resources.
A ZIP file is not the source artifact pair used to define the policy. Similarly, a generic JSON properties file is not a replacement for the implementation template in this Mule 4 custom-policy model.
Thus, among the available combinations, the XML policy template together with the YAML configuration file is the required pair.
Reference topics: Mule Gateway custom policies; XML policy templates; YAML policy configuration; HTTP Policy Transform Extension.
Official documentation: https://docs.mulesoft.com/mule-gateway/policies-custom-mule-4-reference
NEW QUESTION # 49
A custom policy needs to be developed to intercept all outbound HTTP requests made by Mule applications.
Which XML element must be used to intercept outbound HTTP requests?
Answer: B
Explanation:
In Mule Gateway custom policies, inbound and outbound interception are represented by different policy blocks. The http-policy:source block surrounds processing that begins at an HTTP Listener and is therefore associated with incoming requests. To intercept HTTP requests generated by an application through an HTTP Request connector, the policy must instead define an http-policy:operation block.
MuleSoft explicitly documents outbound policies as policies that operate on outgoing HTTP requests. Within a custom policy, http-policy:operation allows policy logic to execute immediately before Mule reaches an HTTP Requester and again after that requester returns. An http-policy:execute-next element can be placed within the operation block to delimit pre-request and post-response processing.
This mechanism is appropriate for functionality such as adding outbound headers, enforcing outbound security rules, modifying requests, collecting telemetry, or inspecting downstream responses. http-policy:
source cannot provide equivalent outbound interception because it applies around the inbound source and application flow. http-policy:processor is not the Mule Gateway construct used for this purpose.
Therefore, the required element is http-policy:operation.
Reference topics: Mule Gateway Custom Policies; Outbound Policies; http-policy:operation; http-policy:
execute-next; HTTP Request interception.
Official documentation: https://docs.mulesoft.com/mule-gateway/policies-custom-mule-4-reference
NEW QUESTION # 50
Which type of cache invalidation does the Cache scope support without having to write any additional code?
Answer: C
Explanation:
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. Reference: https://docs.mulesoft.com/mule-runtime/4.3/cache-scope#cache_invalidation
NEW QUESTION # 51
A developer is working on a project that requires encrypting all data before sending it to a backend application. To accomplish this, the developer will use PGP encryption in the Mule 4 Cryptography module.
What is required to encrypt the data before sending it to the backend application?
Answer: D
Explanation:
PGP uses asymmetric cryptography for establishing confidentiality between a sender and a recipient. When the Mule application sends encrypted information to the backend service, it encrypts the content using the recipient's public key. Only the corresponding private key, retained by the backend recipient, can subsequently be used to decrypt that content.
MuleSoft's Cryptography Module documentation explicitly identifies the two principal PGP scenarios:
outgoing encryption uses another party's public key, while incoming decryption uses the receiver's own private key. In a Mule application, the backend's public key is normally imported into a PGP public keyring, and the Cryptography Module's PGP Encrypt operation references the appropriate key or fingerprint.
The sender does not need the backend's private key. In fact, distributing the recipient's private key would defeat the fundamental security model of public-key cryptography. Both keys would be relevant for certain combined operations such as encryption plus signing, but ordinary encryption for confidentiality requires the recipient's public key. HTTPS/TLS may additionally protect transport, but it is separate from PGP payload encryption.
Reference topics: Cryptography Module; PGP Encryption; Public and Private Keyrings; PGP Encrypt Operation.
Official documentation: https://docs.mulesoft.com/cryptography-module/latest/cryptography-module-pgp
NEW QUESTION # 52
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