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| Section | Objectives |
|---|---|
| Topic 1: Anypoint Platform Architecture | - Runtime Fabric architecture overview - Deployment models (CloudHub, hybrid, on-premises) - Anypoint Platform components and capabilities |
| Topic 2: API Management and Governance | - API lifecycle management - Governance frameworks and best practices - API security policies and enforcement |
| Topic 3: Security and Compliance | - Secure API exposure and threat protection - Authentication and authorization mechanisms |
| Topic 4: Integration Architecture Strategy | - System, process, and experience APIs - Designing enterprise integration architecture - API-led connectivity principles |
| Topic 5: Performance and Scalability | - High availability design patterns - Scaling Mule applications |
| Topic 6: Data Integration and Transformation | - Data mapping and transformation strategies - Batch vs real-time integration patterns |
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問題 #130
An API implementation is being designed that must invoke an Order API, which is known to repeatedly experience downtime.
For this reason, a fallback API is to be called when the Order API is unavailable.
What approach to designing the invocation of the fallback API provides the best resilience?
答案：D
解題說明：
Correct Answe r: Search Anypoint exchange for a suitable existing fallback API, and then implement invocations to this fallback API in addition to the order API
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>> It is not ideal and good approach, until unless there is a pre-approved agreement with the API clients that they will receive a HTTP 3xx temporary redirect status code and they have to implement fallback logic their side to call another API.
>> Creating separate entry of same Order API in API manager would just create an another instance of it on top of same API implementation. So, it does NO GOOD by using clone od same API as a fallback API. Fallback API should be ideally a different API implementation that is not same as primary one.
>> There is NO option currently provided by Anypoint HTTP Connector that allows us to invoke a fallback API when we receive certain HTTP status codes in response.
The only statement TRUE in the given options is to Search Anypoint exchange for a suitable existing fallback API, and then implement invocations to this fallback API in addition to the order API.
問題 #131
What best explains the use of auto-discovery in API implementations?
答案：C
解題說明：
Correct Answe r: It makes API Manager aware of API implementations and hence enables it to enforce policies.
*****************************************
>> API Autodiscovery is a mechanism that manages an API from API Manager by pairing the deployed application to an API created on the platform.
>> API Management includes tracking, enforcing policies if you apply any, and reporting API analytics.
>> Critical to the Autodiscovery process is identifying the API by providing the API name and version.
Reference:
https://docs.mulesoft.com/api-manager/2.x/api-auto-discovery-new-concept
https://docs.mulesoft.com/api-manager/1.x/api-auto-discovery
https://docs.mulesoft.com/api-manager/2.x/api-auto-discovery-new-concept
問題 #132
An organization requires several APIs to be secured with OAuth 2.0, and PingFederate has been identified as the identity provider for API client authorization, The PingFederate Client Provider is configured in access management, and the PingFederate OAuth 2.0 Token Enforcement policy is configured for the API instances required by the organization. The API instances reside in two business groups (Group A and Group B) within the Master Organization (Master Org).
What should be done to allow API consumers to access the API instances?
答案：C
解題說明：
OAuth 2.0 and PingFederate Setup:
The organization uses PingFederate as the identity provider, integrated with Anypoint Platform for OAuth 2.0 authentication and authorization.
The PingFederate OAuth 2.0 Token Enforcement policy is applied to the API instances, requiring clients to be registered and authenticated via PingFederate.
Accessing Secured APIs:
API consumers need to register their client applications in Anypoint Exchange to request access to the secured APIs.
The API administrator then reviews and approves the access request in API Manager. This grants the client application a contract, allowing it to access the API using OAuth 2.0 tokens issued by PingFederate.
Evaluating the Options:
Option A: Configuring the client discovery URL in child business groups is not relevant to granting access; this is part of setting up PingFederate, not managing consumer access.
Option B: While creating contracts in API Manager is necessary, this option lacks the detail about the process in Anypoint Exchange, where consumers request access.
Option C (Correct Answer): API consumers must create a client application in Anypoint Exchange to request access to the API, and the API administrator then approves the request in API Manager.
Option D: The access request and approval process happens within Anypoint Platform (Exchange and API Manager), not directly in Ping Identity.
Conclusion:
Option C is the correct answer as it accurately describes the process within Anypoint Platform where API consumers request access through Exchange, and the API administrator approves it.
Refer to MuleSoft's documentation on OAuth 2.0 setup with PingFederate and managing API client access in Exchange and API Manager.
問題 #133
A circuit breaker strategy is planned in order to meet the goal of improved response time and demand on a downstream API.
* Circuit Open: More than 10 errors per minute for three minutes
* Circuit Half-Open: One error per minute
* Circuit Closed: Less than one error per minute for five minutes
Out of several proposals from the engineering team, which option will meet this goal?
答案：B
解題說明：
Understanding Circuit Breaker Policy:
A circuit breaker is a design pattern used to detect failures and prevent an application from continually trying to execute a failing operation. In this case, it will help improve response time and reduce demand on the downstream API.
The specified configuration includes conditions for opening, half-opening, and closing the circuit based on error rates over time:
Circuit Open: Triggered if there are more than 10 errors per minute for three consecutive minutes.
Circuit Half-Open: The circuit transitions to half-open if there is one error per minute.
Circuit Closed: The circuit closes if the error rate is less than one error per minute for five minutes.
Evaluating the Options:
Option A: Creating a custom policy with template expressions could work, but it would require custom development. Since the Anypoint Platform already has a Circuit Breaker policy available, this would be a less efficient and more complex solution.
Option B: Anypoint Monitoring alerts can be used for monitoring the API, but they do not provide circuit-breaking functionality. Additionally, implementing a retry strategy for the half-open state is not sufficient to achieve the required circuit breaker behavior.
Option C (Correct Answer): Adding the Circuit Breaker policy to the API instance on Anypoint Platform allows you to set up circuit-breaking conditions directly. This approach uses the built-in Circuit Breaker policy, where you can configure parameters such as error thresholds and time intervals to match the requirements. This solution is efficient, reliable, and leverages Anypoint's out-of-the-box capabilities.
Option D: Implementing the strategy within a Mule application with a YAML configuration could be complex and less manageable. Additionally, it does not leverage Anypoint Platform's built-in Circuit Breaker policy, which is more suited to this scenario.
Conclusion:
Option C is the correct choice, as it leverages Anypoint Platform's Circuit Breaker policy. This solution allows for configuring thresholds and time intervals as specified, improving response time and reducing demand on the downstream API while utilizing Anypoint's managed policy feature.
Refer to MuleSoft's documentation on implementing the Circuit Breaker policy in API Manager for detailed configuration guidance.
問題 #134
An API has been updated in Anypoint exchange by its API producer from version 3.1.1 to 3.2.0 following accepted semantic versioning practices and the changes have been communicated via the APIs public portal. The API endpoint does NOT change in the new version. How should the developer of an API client respond to this change?
答案：A
問題 #135
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