Mulesoft MCIA-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCIA-LEVEL1 Online Questions & Answers

• Question 11:

  An API client makes an HTTP request to an API gateway with an Accept header containing the value'' application''. What is a valid HTTP response payload for this request in the client requested data format?

  A. healthy
  B. {"status" "healthy"}
  C. status(`healthy")
  D. status: healthy
  B. {"status" "healthy"}

• Question 12:

  A global organization operates datacenters in many countries. There are private network links between these datacenters because all business data (but NOT metadata) must be exchanged over these private network connections.

  The organization does not currently use AWS in any way.

  The strategic decision has Just been made to rigorously minimize IT operations effort and investment going forward.

  What combination of deployment options of the Anypoint Platform control plane and runtime plane(s) best serves this organization at the start of this strategic journey?

  A. MuleSoft-hosted Anypoint Platform control plane CloudHub Shared Worker Cloud in multiple AWS regions
  B. Anypoint Platform - Private Cloud Edition Customer-hosted runtime plane in each datacenter
  C. MuleSoft-hosted Anypoint Platform control plane Customer-hosted runtime plane in multiple AWS regions
  D. MuleSoft-hosted Anypoint Platform control plane Customer-hosted runtime plane in each datacenter
  D. MuleSoft-hosted Anypoint Platform control plane Customer-hosted runtime plane in each datacenter

  ---

  Correct answer is MuleSoft-hosted Anypoint Platform control plane Customer-hosted runtime plane in each datacenter There are two things to note about the question which can help us figure out correct answer.. # Business data must be exchanged over these private network connections which means we can not use MuleSoft provided Cloudhub option. So we are left with either customer hosted runtime in external cloud provider or customer hosted runtime in their own premises. As customer does not use

  AWS at the moment. Hence that don't have the immediate option of using Customer-hosted runtime plane in multiple AWS regions. hence the most suitable option for runtime plane is Customer-hosted runtime plane in each datacenter # Metadata has no limitation to reside in organization premises. Hence for control plane MuleSoft hosted Anypoint platform can be used as a strategic solution.

  Hybrid is the best choice to start. Mule hosted Control plane and Customer hosted Runtime to start with.Once they mature in cloud migration, everything can be in Mule hosted.

• Question 13:

  An architect is designing a Mule application to meet the following two requirements:

  1.

  The application must process files asynchronously and reliably from an FTPS server to a back-end database using VM intermediary queues for load-balancing Mule events.

  2.

  The application must process a medium rate of records from a source to a target system using a Batch Job scope.

  To make the Mule application more reliable, the Mule application will be deployed to two CloudHub 1.0 workers.

  Following MuleSoft-recommended best practices, how should the Mule application deployment typically be configured in Runtime Manger to best upport the performance and reliability goals of both the Batch Job scope and the file processing VM queues?

  A. Check the Persistent VM queues checkbox in the application deployment configuration
  B. Check the Non-persistent VM queues checkbox in the application deployment configuration
  C. In the Runtime Manager Properties tab, disable persistent VM queues for Batch Job scopes
  D. In the Runtime Manager Properties tab, enable persistent VM queues for the FTPS connector
  A. Check the Persistent VM queues checkbox in the application deployment configuration

  ---

  Requirements:

  Asynchronous and Reliable File Processing: The application must process files from an FTPS server to a back-end database using VM intermediary queues for load balancing.

  Batch Job Processing: The application must process records from a source to a target system using a Batch Job scope.

  Persistent VM Queues:

  Reliability: Persistent VM queues ensure that messages are not lost even if there is a system failure or restart. This is critical for reliable file processing and load balancing.

  Asynchronous Processing: Persistent queues allow for asynchronous processing, where messages can be stored and processed independently of the producer and consumer lifecycles.

  MuleSoft Best Practices:

  Persistent VM Queues for Load Balancing: Using persistent VM queues aligns with MuleSoft best practices for ensuring reliable message processing and load balancing between Mule events.

  High Availability: With CloudHub 1.0 workers, enabling persistent VM queues helps maintain high availability and reliability of the application.

  Batch Job Scope: Ensuring persistence for VM queues also benefits batch processing by maintaining consistency and ensuring all records are processed even in the event of disruptions.

  Configuration in Runtime Manager:

  Deployment Configuration: When deploying the Mule application in Runtime Manager, check the "Persistent VM queues" checkbox to enable this feature.

  Impact: This configuration ensures that the application meets its performance and reliability goals by safeguarding the integrity and continuity of the processing tasks.

  References:

  MuleSoft Documentation on VM Queues: VM Queues MuleSoft Best Practices: MuleSoft Best Practices CloudHub Deployment Guide: CloudHub Deployment

• Question 14:

  The ABC company has an Anypoint Runtime Fabric on VMs/Bare Metal (RTF-VM) appliance installed on its own customer-hosted AWS infrastructure.

  Mule applications are deployed to this RTF-VM appliance. As part of the company standards, the Mule application logs must be forwarded to an external log management tool (LMT).

  Given the company's current setup and requirements, what is the most idiomatic (used for its intended purpose) way to send Mule application logs to the external LMT?

  A. In RTF-VM, install and configure the external LTM's log-forwarding agent
  B. In RTF-VM, edit the pod configuration to automatically install and configure an Anypoint Monitoring agent
  C. In each Mule application, configure custom Log4j settings
  D. In RTF-VM. configure the out-of-the-box external log forwarder
  A. In RTF-VM, install and configure the external LTM's log-forwarding agent

  ---

  https://help.mulesoft.com/s/article/Enable-external-log-forwarding-for-Mule-applications-deployed-in-RTF

• Question 15:

  Refer to the exhibit.

  

  A business process involves two APIs that interact with each other asynchronously over HTTP. Each API is implemented as a Mule application. API 1 receives the initial HTTP request and invokes API 2 (in a fire and forget fashion) while API 2, upon completion of the processing, calls back into API l to notify about completion of the asynchronous process.

  Each API Is deployed to multiple redundant Mule runtimes and a separate load balancer, and is deployed to a separate network zone.

  In the network architecture, how must the firewall rules be configured to enable the above Interaction between API 1 and API 2?

  A. To authorize the certificate to be used both APIs
  B. To enable communication from each API's Mule Runtimes and Network zone to the load balancer of the other API
  C. To open direct two-way communication between the Mule Runtimes of both API's
  D. To allow communication between load balancers used by each API
  B. To enable communication from each API's Mule Runtimes and Network zone to the load balancer of the other API

  ---

  # If your API implementation involves putting a load balancer in front of your APIkit application, configure the load balancer to redirect URLs that reference the baseUri of the application directly. If the load balancer does not redirect URLs, any calls that reach the load balancer looking for the application do not reach their destination.

  # When you receive incoming traffic through the load balancer, the responses will go out the same way. However, traffic that is originating from your instance will not pass through the load balancer. Instead, it is sent directly from the public IP address of your instance out to the Internet. The ELB is not involved in that scenario.

  # The question says "each API is deployed to multiple redundant Mule runtimes", that seems to be a hint for self hosted Mule runtime cluster. Set Inbound allowed for the LB, outbound allowed for runtime to request out.

  # Hence correct way is to enable communication from each API's Mule Runtimes and Network zone to the load balancer of the other API. Because communication is asynchronous one

  https://docs.mulesoft.com/apikit/4.x/configure-load-balancer-task

• Question 16:

  Additional nodes are being added to an existing customer-hosted Mule runtime cluster to improve performance. Mule applications deployed to this cluster are invoked by API clients through a load balancer.

  What is also required to carry out this change?

  A. A new load balancer must be provisioned to allow traffic to the new nodes in a round- robin fashion
  B. External monitoring tools or log aggregators must be configured to recognize the new nodes
  C. API implementations using an object store must be adjusted to recognize the new nodes and persist to them
  D. New firewall rules must be configured to accommodate communication between API clients and the new nodes
  B. External monitoring tools or log aggregators must be configured to recognize the new nodes

  ---

  # Clustering is a group of servers or mule runtime which acts as a single unit.

  # Mulesoft Enterprise Edition supports scalable clustering to provide high availability for the Mulesoft application.

  # In simple terms, virtual servers composed of multiple nodes and they communicate and share information through a distributed shared memory grid.

  # By default, Mulesoft ensures the High availability of applications if clustering implemented.

  # Let's consider the scenario one of the nodes in cluster crashed or goes down and under maintenance. In such cases, Mulesoft will ensure that requests are processed by other nodes in the cluster. Mulesoft clustering also ensures that the request is load balanced between all the nodes in a cluster.

  # Clustering is only supported by on-premise Mule runtime and it is not supported in Cloudhub. Correct answer is External monitoring tools or log aggregators must be configured to recognize the new nodes

  # Rest of the options are automatically taken care of when a new node is added in cluster.

  https://docs.mulesoft.com/runtime-manager/cluster-about

• Question 17:

  What is an advantage of using OAuth 2.0 client credentials and access tokens over only API keys for API authentication?

  A. If the access token is compromised, the client credentials do not to be reissued.
  B. If the access token is compromised, I can be exchanged for an API key.
  C. If the client ID is compromised, it can be exchanged for an API key
  D. If the client secret is compromised, the client credentials do not have to be reissued.
  A. If the access token is compromised, the client credentials do not to be reissued.

  ---

  The advantage of using OAuth 2.0 client credentials and access tokens over only API keys for API authentication is that if the access token is compromised, the client credentials do not have to be reissued.

  OAuth 2.0 is a secure protocol for authenticating clients and authorizing them to access protected resources. It works by having the client authenticate with the authorization server and receive an access token, which is then used to authenticate requests to the API. If the access token is compromised, it can be revoked and replaced without needing to reissue the client credentials.

  References: MuleSoft Certified Integration Architect - Level 1 Official Text Book and Resources:

  Chapter 7: Security

  Section 7.2: OAuth 2.0

• Question 18:

  An integration team uses Anypoint Platform and follows MuleSoft's recommended approach to full lifecycle API development. Which step should the team's API designer take before the API developers implement the AP! Specification?

  A. Generate test cases using MUnit so the API developers can observe the results of running the API
  B. Use the scaffolding capability of Anypoint Studio to create an API portal based on the API specification
  C. Publish the API specification to Exchange and solicit feedback from the API's consumers
  D. Use API Manager to version the API specification
  C. Publish the API specification to Exchange and solicit feedback from the API's consumers

• Question 19:

  Mule application is deployed to Customer Hosted Runtime. Asynchronous logging was implemented to improved throughput of the system. But it was observed over the period of time that few of the important exception log messages which were used to rollback transactions are not working as expected causing huge loss to the Organization. Organization wants to avoid these losses. Application also has constraints due to which they cant compromise on throughput much. What is the possible option in this case?

  A. Logging needs to be changed from asynchronous to synchronous
  B. External log appender needs to be used in this case
  C. Persistent memory storage should be used in such scenarios
  D. Mixed configuration of asynchronous or synchronous loggers should be used to log exceptions via synchronous way
  D. Mixed configuration of asynchronous or synchronous loggers should be used to log exceptions via synchronous way

  ---

  Correct approach is to use Mixed configuration of asynchronous or synchronous loggers shoud be used to log exceptions via synchronous way Asynchronous logging poses a performance-reliability trade-off. You may lose some messages if Mule crashes before the logging buffers flush to the disk. In this case, consider that you can have a mixed configuration of asynchronous or synchronous loggers in your app. Best practice is to use asynchronous logging over synchronous with a minimum logging level of WARN for a production application. In some cases, enable INFO logging level when you need to confirm events such as successful policy installation or to perform troubleshooting. Configure your logging strategy by editing your application's src/main/resources/log4j2.xml file

• Question 20:

  According to the Internet Engineering Task Force (IETF), which supporting protocol does File Transfer Protocol (FTP) use for reliable communication?

  A. A Secure Sockets Layer (SSL)
  B. B Transmission Control Protocol (TCP)
  C. Lightweight Directory Access Protocol (LDAP)
  D. Hypertext Transfer Protocol (HTTP)
  B. B Transmission Control Protocol (TCP)