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Salesforce Mule-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Expose Production-Ready Anypoint Platform Managed APIs	13%	- Manage APIs with Anypoint Platform 1. Configure API policies 2. Implement server-side API caching 3. Implement API versioning 4. Request and manage API access 5. Implement HTTP callbacks
Implement Performant and Reliable Mule Applications	27%	- Optimize reliability and performance 1. Implement performant API invocations 2. Implement ObjectStore persistence 3. Implement asynchronous processing 4. Build fault-tolerant message processing 5. Validate assertions using validation modules
Implement Monitorable Mule Applications	15%	- Implement monitoring and logging 1. Change log levels dynamically 2. Implement monitoring dashboards and alerts 3. Configure and evaluate application logs 4. Expose health check endpoints
Secure Data at Rest and in Transit	20%	- Implement security best practices 1. Implement TLS mutual authentication 2. Expose APIs over HTTPS 3. Secure sensitive data in Mule applications 4. Create and distribute certificates and keys 5. Implement secure property management
Implement Maintainable and Modular Mule Applications and Their Maven Builds	25%	- Implement modular Mule application structures 1. Execute MUnit tests with Maven 2. Implement unit testing with MUnit framework 3. Optimize Maven build configurations 4. Implement Maven-based automated deployments 5. Create custom API rules

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Salesforce Certified MuleSoft Developer II Mule-Dev-301 Prüfungsfragen mit Lösungen (Q22-Q27):

22. Frage
Which statement is true about using mutual TLS to secure an application?

A. Mutual TLS ensures only authorized end users are allowed to access an endpoint
B. Mutual TLS requires a hardware security module to be used
C. Mutual TLS authenticates the identity of the server before the identity of the client
D. Mutual TLS increases the encryption strength versus server-side TLS alone

Antwort: C

Begründung:
Standard TLS authenticates the server to the client through the server's public certificate. The client validates that certificate against its configured trusted certificate authorities. Mutual TLS extends this process by requiring the client to present its own certificate so that the server can authenticate the client's identity as well.
MuleSoft describes a TLS-enabled server as exposing its public certificate while retaining its private key, and states that TLS clients validate the server certificate against their trusted certificates. For two-way TLS, both keystore and truststore material are configured so that the server can additionally validate certificates presented by clients.
Accordingly, server identity authentication is part of the TLS handshake before completion of the mutual client-authentication exchange. This makes option C the valid statement in the context of the question.
mTLS does not inherently increase the symmetric encryption strength; cipher-suite strength is independent of whether one-way or two-way authentication is used. A hardware security module can be useful for protecting keys but is not mandatory for mTLS. Finally, mTLS authenticates certificate-bearing client identities, not necessarily individual application end users or their business authorization.
Reference topics: TLS; mutual TLS; two-way authentication; keystore; truststore; client certificate authentication.
Official documentation: https://docs.mulesoft.com/mule-runtime/4.3/tls-configuration

23. Frage
When a client and server are exchanging messages during the mTLS handshake, what is being agreed on during the cipher suite exchange?

A. A protocol
B. An encryption algorithm
C. The TLS version
D. The Public key format

Antwort: B

Begründung:
A cipher suite is a set of cryptographic algorithms that are used to secure the communication between a client and a server. A cipher suite consists of four components: a key exchange algorithm, an authentication algorithm, an encryption algorithm, and a message authentication code (MAC) algorithm. During the cipher suite exchange, the client and the server agree on which encryption algorithm to use for encrypting and decrypting the data. Reference: https://docs.mulesoft.com/mule-runtime/4.3/tls-configuration#cipher-suites

24. Frage
Which statement is true when using XML SDK for creating custom message processors?

A. An XML SDK provides both inbound and outbound operations
B. Properties are fields defined by an end user of the XML SDK component and serve as a global configuration for the entire Mule project in which they are used
C. All operations are public
D. Operations can be reused in recursive calls

Antwort: B

Begründung:
When using XML SDK for creating custom message processors, all operations are public by default and can be used by any Mule application that imports them. There is no way to make an operation private or protected in XML SDK. Reference: https://docs.mulesoft.com/mule-sdk/1.1/xml-sdk#operations

25. Frage
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?

A. The application needs the private key from the backend service to encrypt the data
B. The application needs both the private and public keys to encrypt the data
C. The application needs to configure HTTPS TLS context information to encrypt the data
D. The application needs the public key from the backend service to encrypt the data

Antwort: D

Begründung:
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

26. Frage
An order processing system is composed of multiple Mule application responsible for warehouse, sales and shipping. Each application communication using Anypoint 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. Set a custom Anypoint MQ user property to propagate the order ID and set the correlation ID in the receiving applications.
B. Use the underlying HTTP request of Anypoint MQ to set the 'X-CORRELATION_ID' header to the order ID
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

Antwort: D

Begründung:
To propagate the order ID as the correlation ID across each message using Anypoint MQ, the developer should wrap all Anypoint MQ Publish operations within a With CorrelationID scope from the Tracing module, setting the correlation ID to the order ID. The With CorrelationID scope allows setting a custom correlation ID for any event that occurs within it. The Tracing module also enables distributed tracing across different Mule applications and services using Anypoint Monitoring. Reference: https://docs.mulesoft.com/tracing-module/1.0/tracing-module-reference#with-correlation-id-scope https://docs.mulesoft.com/tracing-module/1.0/tracing-module-concepts

27. Frage
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