Mulesoft MCIA-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCIA-LEVEL1 Online Questions & Answers

• Question 31:

  What is a defining characteristic of an integration-Platform-as-a-Service (iPaaS)?

  A. A Cloud-based
  B. No-code
  C. Code-first
  D. On-premises
  A. A Cloud-based

• Question 32:

  According to MuleSoft, which system integration term describes the method, format, and protocol used for communication between two system?

  A. Component
  B. interaction
  C. Message
  D. Interface
  D. Interface

• Question 33:

  A Mule application is synchronizing customer data between two different database systems.

  What is the main benefit of using XA transaction over local transactions to synchronize these two database system?

  A. Reduce latency
  B. Increase throughput
  C. Simplifies communincation
  D. Ensure consistency
  D. Ensure consistency

  ---

  # XA transaction add tremendous latency so "Reduce Latency" is incorrect option XA transactions define "All or No" commit protocol.

  # Each local XA resource manager supports the A.C.I.D properties (Atomicity, Consistency, Isolation, and Durability).

  So correct choice is "Ensure consistency"

  https://docs.mulesoft.com/mule-runtime/4.3/xa-transactions

• Question 34:

  Mule application muleA deployed in cloudhub uses Object Store v2 to share data across instances. As a part of new requirement , application muleB which is deployed in same region wants to access this Object Store. Which of the following option you would suggest which will have minimum latency in this scenario?

  A. Object Store REST API
  B. Object Store connector
  C. Both of the above option will have same latency
  D. Object Store of one mule application cannot be accessed by other mule application.
  A. Object Store REST API

  ---

  V2 Rest API is recommended for on premise applications to access Object Store. It also comes with overhead of encryption and security of using rest api. With Object Store v2, the API call is localized to the same data center as the Runtime Manager app. But in this case requirement is to access the OS of other mule application and not the same mule application.

  You can configure a Mule app to use the Object Store REST API to store and retrieve values from an object store in another Mule app.

  However, Object Store v2 is not designed for app-to-app communication.

• Question 35:

  To implement predictive maintenance on its machinery equipment, ACME Tractors has installed thousands of IoT sensors that will send data for each machinery asset as sequences of JMS messages, in near real-time, to a JMS queue named SENSOR_DATA on a JMS server. The Mule application contains a JMS Listener operation configured to receive incoming messages from the JMS servers SENSOR_DATA JMS queue. The Mule application persists each received JMS message, then sends a

  transformed version of the corresponding Mule event to the machinery equipment back-end systems.

  The Mule application will be deployed to a multi-node, customer-hosted Mule runtime cluster. Under normal conditions, each JMS message should be processed exactly once.

  How should the JMS Listener be configured to maximize performance and concurrent message processing of the JMS queue?

  A. Set numberOfConsumers = 1 Set primaryNodeOnly = false
  B. Set numberOfConsumers = 1 Set primaryNodeOnly = true
  C. Set numberOfConsumers to a value greater than one Set primaryNodeOnly = true
  D. Set numberOfConsumers to a value greater than one Set primaryNodeOnly = false
  D. Set numberOfConsumers to a value greater than one Set primaryNodeOnly = false

  ---

  https://docs.mulesoft.com/jms-connector/1.8/jms-performance

• Question 36:

  A platform architect includes both an API gateway and a service mesh in the architect of a distributed application for communication management. Which type of communication management does a service mesh typically perform in this architecture?

  A. Between application services and the firewall
  B. Between the application and external API clients
  C. Between services within the application
  D. Between the application and external API implementations.
  C. Between services within the application

• Question 37:

  A new upstream API Is being designed to offer an SLA of 500 ms median and 800 ms maximum (99th percentile) response time. The corresponding API implementation needs to sequentially invoke 3 downstream APIs of very similar complexity. The first of these downstream APIs offers the following SLA for its response time: median: 100 ms, 80th percentile: 500 ms, 95th percentile: 1000 ms. If possible, how can a timeout be set in the upstream API for the invocation of the first downstream API to meet the new upstream API's desired SLA?

  A. Set a timeout of 100 ms; that leaves 400 ms for the other two downstream APIs to complete
  B. Do not set a timeout; the Invocation of this API Is mandatory and so we must wait until it responds
  C. Set a timeout of 50 ms; this times out more invocations of that API but gives additional room for retries
  D. No timeout is possible to meet the upstream API's desired SLA; a different SLA must be negotiated with the first downstream API or invoke an alternative API
  D. No timeout is possible to meet the upstream API's desired SLA; a different SLA must be negotiated with the first downstream API or invoke an alternative API

  ---

  Before we answer this question , we need to understand what median (50th percentile) and 80th percentile means. If the 50th percentile (median) of a response time is 500ms that means that 50% of my transactions are either as fast or faster than 500ms. If the 90th percentile of the same transaction is at 1000ms it means that 90% are as fast or faster and only 10% are slower. Now as per upstream SLA , 99th percentile is 800 ms which means 99% of the incoming requests should have response time less

  than or equal to 800 ms. But as per one of the backend API , their 95th percentile is 1000 ms which means that backend API will take 1000 ms or less than that for 95% of. requests. As there are three API invocation from upstream API , we can not conclude a timeout that can be set to meet the desired SLA as backend SLA's do not support it.

  Let see why other answers are not correct.

  1) Do not set a timeout --> This can potentially violate SLA's of upstream API

  2) Set a timeout of 100 ms; ---> This will not work as backend API has 100 ms as median meaning only 50% requests will be answered in this time and we will get timeout for 50% of the requests. Important thing to note here is, All APIs need to be executed sequentially, so if you get timeout in first API, there is no use of going to second and third API. As a service provider you wouldn't want to keep 50% of your consumers dissatisfied. So not the best option to go with.

  #To quote an example: Let's assume you have built an API to update customer contact details.

  - First API is fetching customer number based on login credentials

  - Second API is fetching Info in 1 table and returning unique key

  - Third API, using unique key provided in second API as primary key, updating remaining details

  # Now consider, if API times out in first API and can't fetch customer number, in this case, it's useless to call API 2 and 3 and that is why question mentions specifically that all APIs need to be executed sequentially.

  3) Set a timeout of 50 ms --> Again not possible due to the same reason as above Hence correct answer is No timeout is possible to meet the upstream API's desired SLA; a different SLA must be negotiated with the first downstream API or invoke an alternative API

• Question 38:

  An Integration Mule application is being designed to synchronize customer data between two systems. One system is an IBM Mainframe and the other system is a Salesforce Marketing Cloud (CRM) instance. Both systems have been deployed in their typical configurations, and are to be invoked using the native protocols provided by Salesforce and IBM.

  What interface technologies are the most straightforward and appropriate to use in this Mute application to interact with these systems, assuming that Anypoint Connectors exist that implement these interface technologies?

  A. IBM: DB access CRM: gRPC
  B. IBM: REST CRM:REST
  C. IBM: Active MQ CRM: REST
  D. IBM: CICS CRM: SOAP
  D. IBM: CICS CRM: SOAP

  ---

  # Within Anypoint Exchange, MuleSoft offers the IBM CICS connector. Anypoint Connector for IBM CICS Transaction Gateway (IBM CTG Connector) provides integration with back- end CICS apps using the CICS Transaction Gateway.

  # Anypoint Connector for Salesforce Marketing Cloud (Marketing Cloud Connector) enables you to connect to the Marketing Cloud API web services (now known as the Marketing Cloud API), which is also known as the Salesforce Marketing Cloud. This connector exposes convenient operations via SOAP for exploiting the capabilities of Salesforce Marketing Cloud.

• Question 39:

  A banking company is developing a new set of APIs for its online business. One of the critical API's is a master lookup API which is a system API. This master lookup API uses persistent object store. This API will be used by all other APIs to provide master lookup data.

  

  Master lookup API is deployed on two cloudhub workers of 0.1 vCore each because there is a lot of master data to be cached. Master lookup data is stored as a key value pair. The cache gets refreshed if they key is not found in the cache.

  Doing performance testing it was observed that the Master lookup API has a higher response time due to database queries execution to fetch the master lookup data.

  Due to this performance issue, go-live of the online business is on hold which could cause potential financial loss to Bank.

  As an integration architect, which of the below option you would suggest to resolve performance issue?

  A. Implement HTTP caching policy for all GET endpoints for the master lookup API and implement locking to synchronize access to object store
  B. Upgrade vCore size from 0.1 vCore to 0,2 vCore
  C. Implement HTTP caching policy for all GET endpoints for master lookup API
  D. Add an additional Cloudhub worker to provide additional capacity
  A. Implement HTTP caching policy for all GET endpoints for the master lookup API and implement locking to synchronize access to object store

• Question 40:

  In one of the critical payment related mule application, transaction is being used . As an enhancement to implementation , scatter gather route is introduced which is also the part of transaction group. Scatter gather route has 4 routes. What will be the behavior of the Mule application in case of error occurs in 4th route of the scatter-gather router and transaction needs to be rolled back?

  A. Only errored route will be rolled back
  B. All routes will be rolled back
  C. Scatter Gather router cannot be part of transaction
  B. All routes will be rolled back

  ---

  Scatter Gather: When running within a transaction, Scatter Gather does not execute in parallel. This means that the second route is executed after the first one is processed, the third after the second one, etc. In case of error, all routes will be rolled back