Mulesoft MuleSoft Certified Architect MCIA-LEVEL-1-MAINTENANCE Questions & Answers

• Question 201:

  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 same region as to where the Mule application is deployed

  B. Choose the US-West region, the only supported region for CloudHub object stores

  C. Choose the geographically closest available region for each web client

  D. Choose a region that is the traffic-weighted geographic center of all web clients

  Correct Answer: A

  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.

• Question 202:

  Refer to the exhibit.

  An organization is designing a Mule application to receive data from one external business partner. The two companies currently have no shared IT infrastructure and do not want to establish one. Instead, all communication should be over the public internet (with no VPN).

  What Anypoint Connector can be used in the organization's Mule application to securely receive data from this external business partner?

  

  A. File connector

  B. VM connector

  C. SFTP connector

  D. Object Store connector

  Correct Answer: C

  *

  Object Store and VM Store is used for sharing data inter or intra mule applications in same setup. Can't be used with external Business Partner

  *

  Also File connector will not be useful as the two companies currently have no shared IT infrastructure. It's specific for local use.

  *

  Correct answer is SFTP connector. The SFTP Connector implements a secure file transport channel so that your Mule application can exchange files with external resources. SFTP uses the SSH security protocol to transfer messages. You can implement the SFTP endpoint as an inbound endpoint with a one-way exchange pattern, or as an outbound endpoint configured for either a one-way or request-response exchange pattern.

• Question 203:

  An organization is sizing an Anypoint VPC to extend their internal network to Cloudhub.

  For this sizing calculation, the organization assumes 150 Mule applications will be deployed among three(3) production environments and will use Cloudhub's default zero- downtime feature. Each Mule application is expected to be configured with two(2) Cloudhub workers.This is expected to result in several Mule application deployments per hour.

  A. 10.0.0.0/21(2048 IPs)

  B. 10.0.0.0/22(1024IPs)

  C. 10.0.0.0/23(512 IPs)

  D. 10.0.0.0/24(256 IPs)

  Correct Answer: A

  *

  When you create an Anypoint VPC, the range of IP addresses for the network must be specified in the form of a Classless Inter-Domain Routing (CIDR) block, using CIDR notation.

  *

  This address space is reserved for Mule workers, so it cannot overlap with any address space used in your data center if you want to peer it with your VPC.

  *

  To calculate the proper sizing for your Anypoint VPC, you first need to understand that the number of dedicated IP addresses is not the same as the number of workers you have deployed.

  *

  For each worker deployed to CloudHub, the following IP assignation takes place: For better fault tolerance, the VPC subnet may be divided into up to four Availability Zones.

  *

  A few IP addresses are reserved for infrastructure. At least two IP addresses per worker to perform at zero-downtime.

  *

  Hence in this scenario 2048 IP's are required to support the requirement.

• Question 204:

  An organization is creating a Mule application that will be deployed to CloudHub. The Mule application has a property named dbPassword that stores a database user's password.

  The organization's security standards indicate that the dbPassword property must be hidden from every Anypoint Platform user after the value is set in the Runtime Manager Properties tab.

  What configuration in the Mule application helps hide the dbPassword property value in Runtime Manager?

  A. Use secure::dbPassword as the property placeholder name and store the cleartext (unencrypted) value in a secure properties placeholder file

  B. Use secure::dbPassword as the property placeholder name and store the property encrypted value in a secure properties placeholder file

  C. Add the dbPassword property to the secureProperties section of the pom.xml file

  D. Add the dbPassword property to the secureProperties section of the mule-artifact.json file

  Correct Answer: B

  Reference: https://docs.mulesoft.com/runtime-manager/secure-application-properties

• Question 205:

  A customer wants to use the mapped diagnostic context (MDC) and logging variables to enrich its logging and improve tracking by providing more context in the logs.

  The customer also wants to improve the throughput and lower the latency of message processing.

  As an Mulesoft integration architect can you advise, what should the customer implement to meet these requirements?

  A. Use synchronous logging and use pattern layout with [%MDC] in the log4j2.xml configuration file and then configure the logging variables

  B. Useasync logger at the level greater than INFO and use pattern layout with [%MDC] in the log4j2,xml configuration file and then configure the logging variables

  C. Useasync logger at the level equal to DEBUG orTRACEand use pattern layout with [%MDC] in the log4j2.xml configuration file and then configure the logging variables

  D. Use synchronous logging at the INFO DEBUG or Trace level and use pattern layout with [%MDC] in the log4j2.xml configuration file and then configure the logging variables

  Correct Answer: B

• Question 206:

  As an enterprise architect, what are the two reasons for which you would use a canonical data model in the new integration project using Mulesoft Anypoint platform ( choose two answers )

  A. To have consistent data structure aligned in processes

  B. To isolate areas within a bounded context

  C. To incorporate industry standard data formats

  D. There are multiple canonical definitions of each data type

  E. Because the model isolates the back and systems and support mule applications from change

  Correct Answer: AB

• Question 207:

  Organization wants to achieve high availability goal for Mule applications in customer hosted runtime plane. Due to the complexity involved, data cannot be shared among of different instances of same Mule application. What option best suits to this requirement considering high availability is very much critical to the organization?

  A. The cluster can be configured

  B. Use third party product to implement load balancer

  C. High availability can be achieved only in CloudHub

  D. Use persistent object store

  Correct Answer: B

  High availability is about up-time of your application

  A) High availability can be achieved only in CloudHub isn't correct statement. It can be achieved in customer hosted runtime planes as well B) An object store is a facility for storing objects in or across Mule applications. Mule runtime engine

  (Mule) uses object stores to persist data for eventual retrieval. It can be used for disaster recovery but not for High Availability. Using object store can't guarantee that all instances won't go down at once. So not an appropriate choice.

  Reference: https://docs.mulesoft.com/mule-runtime/4.3/mule-object-stores

  C) High availability can be achieved by below two models for on-premise MuleSoft implementations.

  1) Mule Clustering ?Where multiple Mule servers are available within the same cluster environment and the routing of requests will be done by the load balancer. A cluster is a set of up to eight servers that act as a single deployment target

  and high-availability processing unit. Application instances in a cluster are aware of each other, share common information, and synchronize statuses. If one server fails, another server takes over processing applications. A cluster can run

  multiple applications. ( refer left half of the diagram)

  In given scenario, it's mentioned that 'data cannot be shared among of different instances'.

  So this is not a correct choice.

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

  2) Load balanced standalone Mule instances ?The high availability can be achieved even without cluster, with the usage of third party load balancer pointing requests to different Mule servers. This approach does not share or synchronize

  data between Mule runtimes. Also high availability achieved as load balanced algorithms can be implemented using external load balancer. ( refer right half of the diagram)

• Question 208:

  An organization is designing an integration solution to replicate financial transaction data from a legacy system into a data warehouse (DWH).

  The DWH must contain a daily snapshot of financial transactions, to be delivered as a CSV file. Daily transaction volume exceeds tens of millions of records, with significant spikes in volume during popular shopping periods.

  What is the most appropriate integration style for an integration solution that meets the organization's current requirements?

  A. Event-driven architecture

  B. Microservice architecture

  C. API-led connectivity

  D. Batch-triggered ETL

  Correct Answer: D

  Correct answer is Batch-triggered ETL Within a Mule application, batch processing provides a construct for asynchronously processing larger-than-memory data sets that are split into individual records. Batch jobs allow for the description of a reliable process that automatically splits up source data and stores it into persistent queues, which makes it possible to process large data sets while providing reliability. In the event that the application is redeployed or Mule crashes, the job execution is able to resume at the point it stopped.

• Question 209:

  What are two reasons why a typical MuleSoft customer favors a MuleSoft-hosted Anypoint Platform runtime plane over a customer-hosted runtime for its Mule application deployments? (Choose two.)

  A. Reduced application latency

  B. Increased application isolation

  C. Reduced time-to-market for the first application

  D. Increased application throughput

  E. Reduced IT operations effort

  Correct Answer: CE

• Question 210:

  An organization is designing a mule application to support an all or nothing transaction between serval database operations and some other connectors so that they all roll back if there is a problem with any of the connectors Besides the database connector , what other connector can be used in the transaction.

  A. VM

  B. Anypoint MQ

  C. SFTP

  D. ObjectStore

  Correct Answer: A

  Correct answer is VM VM support Transactional Type. When an exception occur, The transaction rolls back to its original state for reprocessing. This feature is not supported by other connectors. Here is additional information about Transaction management: