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| Section | Weight | Objectives |
|---|---|---|
| Implement Monitorable Mule Applications | 15% | - Expose health check endpoints - Implement logging and log management - Implement message correlation - Monitor applications and runtimes |
| Implement Performant and Reliable Mule Applications | 27% | - Implement reliable messaging patterns - Optimize performance and throughput - Handle HTTP API invocations and errors - Validate messages and payloads - Use ObjectStore for persistence |
| Implement Maintainable and Modular Mule Applications and Maven Builds | 25% | - Implement automated deployment - Modularize applications and builds - Build custom policies and processors - Create reusable libraries - Execute tests with Maven |
| Secure Data at Rest and in Transit | 20% | - Manage keys and certificates - Implement security policies - Manage secure environment properties - Expose and invoke APIs over HTTPS |
| Design and Implement API-led Connectivity | 13% | - Implement API autodiscovery - Implement server-side caching - Implement HTTP callbacks/webhooks |
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質問 # 25
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?
正解：D
解説：
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. Reference: https://docs.mulesoft.com/mule-runtime/4.3/vm-connector#persistent-queues
質問 # 26
What is the MuleSoft recommended method to encrypt sensitive property data?
正解：D
解説：
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. Reference: https://docs.mulesoft.com/mule-runtime/4.3/secure-configuration-properties
質問 # 27
Refer to the exhibit.
A Mule Object Store is configured with an entry TTL of one second and an expiration interval of 30 seconds.
What is the result of the flow if processing between os:store and os:retrieve takes 10 seconds?
Exhibit:
正解：D
解説：
The distinction between entry TTL and expiration interval is the key to this question. entryTtl="1" specifies that an Object Store entry becomes eligible for expiration after one second. However, expirationInterval="30" determines how frequently Mule's expiration process checks the Object Store and removes expired entries.
MuleSoft describes the expiration interval as the frequency at which the expiration thread runs. Therefore, expiration is not equivalent to immediate physical removal at precisely the TTL boundary.
The flow first sets the payload to originalPayload, then stores "testPayload" under the key testKey. Ten seconds subsequently elapse before the Retrieve operation executes. Although this exceeds the configured one-second TTL, only 10 seconds have elapsed since storage, while the expiration process is configured to run at 30-second intervals. The entry has therefore not yet been evicted when retrieval occurs.
Because testKey remains available, os:retrieve returns the stored value, testPayload. The configured default value nullPayload would be used only if the key were unavailable according to the Retrieve operation's behavior.
Reference topics: Object Store Connector; entry TTL; expiration interval; expiration thread; Store and Retrieve operations.
Official documentation: https://docs.mulesoft.com/object-store-connector/latest/object-store-connector- reference
質問 # 28
Which command is used to convert a JKS keystore to PKCS12?
正解：B
解説：
Java keytool -importkeystore converts a keystore by explicitly defining both the source keystore and its format and the destination keystore and its required format. To convert JKS # PKCS12, the source must therefore be the JKS file with -srcstoretype JKS, while the destination must be the .p12 file with - deststoretype PKCS12.
MuleSoft provides the same conversion pattern in its TLS-related documentation. Its example for converting a JKS client keystore to P12 uses -srckeystore ...jks, -srcstoretype JKS, followed by -destkeystore ...p12 and - deststoretype PKCS12.
Mule supports JKS, PKCS12, and other keystore types for TLS configurations, but the configured file type must correspond correctly to the actual keystore encoding.
Option A reverses the declared store types even though the filenames suggest JKS-to-P12 conversion. Option C performs the opposite conversion, PKCS12 to JKS. Option D incorrectly identifies a .p12 source as JKS and does not correctly express the required source/destination relationship.
Thus, option B contains the correct source and destination formats.
Reference topics: TLS configuration; Java Keytool; JKS; PKCS12; keystore conversion.
Official documentation: https://docs.mulesoft.com/runtime-manager/rtm-agent-REST-connections Official documentation: https://docs.mulesoft.com/mule-runtime/4.9/tls-configuration
質問 # 29
When implementing a synchronous API where the event source is an HTTP Listener, a developer needs to return the same correlation ID back to the caller in the HTTP response header.
How can this be achieved?
正解：A
解説：
When implementing a synchronous API where the event source is an HTTP Listener, Mule automatically propagates some message attributes between flows via outbound and inbound properties. One of these attributes is correlation ID, which is returned to the caller in the response header by default as MULE_CORRELATION_ID. Reference: https://docs.mulesoft.com/mule-runtime/4.3/about-mule-message#message-attributes
質問 # 30
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