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MuleSoft MCIA-Level-1-Maintenance Exam Syllabus Topics:

Topic	Details
Topic 1	Design Mule applications using core routers available to all Mule applications Design Mule applications using common features of core connectors
Topic 2	Select deployment options of the Anypoint Platform control plane and runtime plane Initiating integration solutions on Anypoint Platform
Topic 3	Analyze and counteract potential security vulnerabilities of Mule applications Designing integration solutions to meet security requirements
Topic 4	Select alternatives to traditional transactions (local or XA) where appropriate and beneficial Design unit test suites using MUnit and Studio's related features
Topic 5	Design secure access to the Anypoint Platform control plane and APIs Recognize the audit logging capabilities of Anypoint Platform
Topic 6	Designing integration solutions to meet reliability requirements Design Mule applications and integration solutions to meet performance and capacity goals
Topic 7	Create high-level integration architectures using event-driven APIs and message brokers Create high-level integration architectures using API-led Connectivity
Topic 8	Describe the characteristics and implications of the Mule 4 reactive event processing model Designing for the runtime plane technology architecture

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MuleSoft Certified Integration Architect - Level 1 MAINTENANCE Sample Questions (Q23-Q28):

NEW QUESTION # 23
A global, high-volume shopping Mule application is being built and will be deployed to CloudHub. To improve performance, the Mule application uses a Cache scope that maintains cache state in a CloudHub object store. Web clients will access the Mule application over HTTP from all around the world, with peak volume coinciding with business hours in the web client's geographic location. To achieve optimal performance, what Anypoint Platform region should be chosen for the CloudHub object store?

• A. Choose the geographically closest available region for each web client
• B. Choose the US-West region, the only supported region for CloudHub object stores
• C. Choose the same region as to where the Mule application is deployed
• D. Choose a region that is the traffic-weighted geographic center of all web clients

Answer: C Explanation:
Explanation
CloudHub object store should be in same region where the Mule application is deployed. This will give optimal performance.
Before learning about Cache scope and object store in Mule 4 we understand what is in general Caching is and other related things.
WHAT DOES "CACHING" MEAN?
Caching is the process of storing frequently used data in memory, file system or database which saves processing time and load if it would have to be accessed from original source location every time.
In computing, a cache is a high-speed data storage layer which stores a subset of data, so that future requests for that data are served up faster than is possible by accessing the data's primary storage location. Caching allows you to efficiently reuse previously retrieved or computed data.
How does Caching work?
The data in a cache is generally stored in fast access hardware such as RAM (Random-access memory) and may also be used in correlation with a software component. A cache's primary purpose is to increase data retrieval performance by reducing the need to access the underlying slower storage layer.
Caching in MULE 4
In Mule 4 caching can be achieved in mule using cache scope and/or object-store. Cache scope internally uses Object Store to store the data.
What is Object Store
Object Store lets applications store data and states across batch processes, Mule components, and applications, from within an application. If used on cloud hub, the object store is shared between applications deployed on Cluster.
Cache Scope is used in below-mentioned cases:
Need to store the whole response from the outbound processor
Data returned from the outbound processor does not change very frequently As Cache scope internally handle the cache hit and cache miss scenarios it is more readable Object Store is used in below-mentioned cases:
Need to store custom/intermediary data
To store watermarks
Sharing the data/stage across applications, schedulers, batch.
If CloudHub object store is in same region where the Mule application is deployed it will aid in fast access of data and give optimal performance.
NEW QUESTION # 24
An organization has several APIs that accept JSON data over HTTP POST. The APIs are all publicly available and are associated with several mobile applications and web applications. The organization does NOT want to use any authentication or compliance policies for these APIs, but at the same time, is worried that some bad actor could send payloads that could somehow compromise the applications or servers running the API implementations. What out-of-the-box Anypoint Platform policy can address exposure to this threat?

• A. Apply an IP blacklist policy to all APIs; the blacklist will Include all bad actors
• B. Apply a JSON threat protection policy to all APIs to detect potential threat vectors
• C. Apply a Header injection and removal policy that detects the malicious data before it is used
• D. Shut out bad actors by using HTTPS mutual authentication for all API invocations

Answer: B Explanation:
Explanation
We need to note few things about the scenario which will help us in reaching the correct solution.
Point 1 : The APIs are all publicly available and are associated with several mobile applications and web applications. This means Apply an IP blacklist policy is not viable option. as blacklisting IPs is limited to partial web traffic. It can't be useful for traffic from mobile application Point 2 : The organization does NOT want to use any authentication or compliance policies for these APIs.
This means we can not apply HTTPS mutual authentication scheme.
Header injection or removal will not help the purpose.
By its nature, JSON is vulnerable to JavaScript injection. When you parse the JSON object, the malicious code inflicts its damages. An inordinate increase in the size and depth of the JSON payload can indicate injection.
Applying the JSON threat protection policy can limit the size of your JSON payload and thwart recursive additions to the JSON hierarchy.
Hence correct answer is Apply a JSON threat protection policy to all APIs to detect potential threat vectors
NEW QUESTION # 25
Which of the below requirements prevent the usage of Anypoint MQ in a company's network?(Choose two answers)

• A. the message broker must be hosted on premises
• B. support for point-to-point messaging
• C. ability for a third party outside the company's network to consume events from the queue
• D. single message payload can be up to 15 MB
• E. payloads must be encrypted

Answer: A,B
NEW QUESTION # 26
An organization is designing an integration Mule application to process orders by submitting them to a back-end system for offline processing. Each order will be received by the Mule application through an HTTPS POST and must be acknowledged immediately. Once acknowledged, the order will be submitted to a back-end system. Orders that cannot be successfully submitted due to rejections from the back-end system will need to be processed manually (outside the back-end system).
The Mule application will be deployed to a customer-hosted runtime and is able to use an existing ActiveMQ broker if needed. The ActiveMQ broker is located inside the organization's firewall. The back-end system has a track record of unreliability due to both minor network connectivity issues and longer outages.
What idiomatic (used for their intended purposes) combination of Mule application components and ActiveMQ queues are required to ensure automatic submission of orders to the back-end system while supporting but minimizing manual order processing?

• A. An Until Successful scope to call the back-end system
  One or more ActiveMQ long-retry queues
  One or more ActiveMQ dead-letter queues for manual processing
• B. One or more On Error scopes to assist calling the back-end system
  One or more ActiveMQ long-retry queues
  A persistent dead-letter object store configured in the CloudHub Object Store service
• C. One or more On Error scopes to assist calling the back-end system
  An Until Successful scope containing VM components for long retries
  A persistent dead-letter VM queue configured in CloudHub
• D. A Batch Job scope to call the back-end system
  An Until Successful scope containing Object Store components for long retries A dead-letter object store configured in the Mule application

Answer: A
NEW QUESTION # 27
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 invocation of the fallback API provides the best resilience?

• A. Create a separate entry for the order API in API manager and then invoke this API as a fallback API if the primary Order API is unavailable
• B. Search Anypoint Exchange for a suitable existing fallback API and them implement invocations to their fallback API in addition to the Order API
• C. Redirect client requests through an HTTP 303 temporary redirect status code to the fallback API whenever the Order API is unavailable
• D. Set an option in the HTTP Requester component that invokes the order API to instead invoke a fallback API whenever an HTTP 4XX or 5XX response status code is received from Order API

Answer: C Explanation:
Explanation
* Resilience testing is a type of software testing that observes how applications act under stress. It's meant to ensure the product's ability to perform in chaotic conditions without a loss of core functions or data; it ensures a quick recovery after unforeseen, uncontrollable events.
* In case an API invocation fails - even after a certain number of retries - it might be adequate to invoke a different API as a fallback. A fallback API, by definition, will never be ideal for the purpose of the API client, otherwise it would be the primary API.
* Here are some examples for fallback APIs:
- An old, deprecated version of the same API.
- An alternative endpoint of the same API and version (e.g. API in another CloudHub region).
- An API doing more than required, and therefore not as performant as the primary API.
- An API doing less than required and therefore forcing the API Client to offer a degraded service, which is still better than no service at all.
* API clients implemented as Mule applications offer the 'Until Successful Scope and Exception' strategies at their disposal, which together allow configuring fallback actions such as a fallback API invocation.
* All HTTP response status codes within the 3xx category are considered redirection messages. These codes indicate to the user agent (i.e. your web browser) that an additional action is required in order to complete the request and access the desired resource Diagram Description automatically generated

Hence correct answer is Redirect client requests through an HTTP 303 temporary redirect status code to the fallback API whenever the Order API is unavailable
NEW QUESTION # 28
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