Mulesoft MCD-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCD-LEVEL1 Online Questions & Answers

• Question 211:

  A Batch Job scope has five batch steps. An event processor throws an error in the second batch step because the input data is incomplete. What is the default behavior of the batch job after the error is thrown?

  A. All processing of the batch job stops.
  B. Event processing continues to the next batch step.
  C. Error is ignored
  D. Batch is retried
  A. All processing of the batch job stops.

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  Explanation/Reference:

  In case of an error , batch job completes in flight steps and stops further processing. MuleSoft Doc Ref : Handling Errors During Batch Job | MuleSoft Documentation The default is all processing will stop but we can change it by Max Failed

  Record field. General -> Max Failed Records: Mule has three options for handling a record-level error:

  Finish processing, Continue processing and Continue processing until the batch job accumulates a maximum number of failed records. This behavior can be controlled by Max Failed Records.

  The default value is Zero which corresponds to Finish processing.

  The value -1, corresponds to Continue processing.

  The value +ve integer, corresponds to Continue processing until the batch job accumulates a maximum number of failed records

• Question 212:

  Refer to the exhibits.

  

  The Validation component in the Try scope throws an error.

  What response message is returned to a client request to the main flow's HTTP Listener?

  The Validation component in the Try scope throws an error. What response message is returned to a client request to the main flow's HTTP Listener?

  A. Success - main flow
  B. Error - main flow
  C. Error - Try scope
  D. Validation Error
  A. Success - main flow

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  Explanation/Reference:

  Note that private flow has error scope defined as On Error Continue . So when error occurs in private flow , it is handled by this On Error Continue scope which sends success response back to main flow and does not throw back an error. So main continues normally and payload is set to Success - main flow. Hence correct answer is Success - main flow 1) HTTP listener received request 2) The Flow Reference calls the child flow 3) The Is Number validator creates an Error Object because the payload isn't an integer. Child Flow execution stops #[error.description] = "payload is not a valid INTEGER value" #[error.errorType] = VALIDATION:INVALID_NUMBER 4) The On Error Continue handles the errorThe payload is set to "Error ?Sub Flow" 5) "Error ?Sub Flow" is returned to the main flow as if the child flow was a success. The Set Payload is executed. The payload is reset to "Success ?Finished Main Flow" 6) "Success ?Main Flow" is returned to the requestor in the body of the HTTP request. HTTP Status Code: 200 As you can see, in the above example, because the error was caught by an On Error Continue scope in the child flow (RED in, GREEN out) when the Mule Message returns to the parent flow, the parent flow knows none-the-different that there was a failure because the on error continue returns a 200 success message. Note that because, to the mainFlow, the childFlow appeared to succeed, the processing of mainFlow resumed after the flow reference.

• Question 213:

  To avoid hard-coding values, a flow uses some property placeholders and the corresponding values are stored in a configuration file. Where does the configuration file's location need to be specified in the Mule application?

  A. The pom.xml file
  B. A global element
  C. The mule-art if act .json file
  D. a flow attribute
  B. A global element

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  Explanation/Reference:

  Correct answer is A global element When we create a configuration file , that file needs to added as Global Configuration file in Global element. A global element is a reusable object containing parameters that any number of elements in a flow can share. You reference a global element from Anypoint Connectors or components in your Mule application

• Question 214:

  A web client submits a request to http://localhost:8081?accountType=personal. The query parameter is captured using a Set Variable transformer to a variable named accountType. What is the correct DataWeave expression to log accountType?

  A. Account Type: #[flowVars.accountType]
  B. Account Type: #[message.inboundProperties.accountType]
  C. Account Type: # [attributes.accountType]
  D. Account Type: #[vars.accountType]
  D. Account Type: #[vars.accountType]

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  Explanation/Reference:

  vars: Keyword for accessing a variable, for example, through a DataWeave expression in a Mule component, such as the Logger, or from an Input or Output parameter of an operation. If the name of your variable is myVar, you can access it like this: vars.myVar Hence correct answer is Account Type: #[vars.accountType]

• Question 215:

  What is the output type of the DataWeave map operator?

  A. String
  B. Array
  C. Map
  D. Object
  B. Array

• Question 216:

  What MuleSoft API-led connectivity layer is intended to expose part of a backend database without business logic?

  A. Data layer
  B. Process layer
  C. Experience layer
  D. System layer
  D. System layer

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  Explanation/Reference:

  Correct answer is System layer

  System APIs provide a means for insulating the data consumers from the complexity or changes to the underlying backend systems.

  MuleSoft recommends three-layered approach to API-led connectivity, highlighting the three layers:

  1.

  System APIs

  2.

  Process APIs

  3.

  Experience APIs System APIs are the core systems of record underlying core systems of record (e.g. ERPs, key customer and billing systems, databases, etc.). Process APIs allow you to define a common process which the organization can share, and these APIs perform specific functions, provide access to non-central data, and may be built by either Central IT or Line of Business IT. And finally, the Experience APIs are the means by which data can be reconfigured so that it is most easily consumed by its intended audience, all from a common data source. The three-layered structure allows for a seamless flow of data from systems of record to new experiences, and allows for reusability of assets rather than point to point connections. This approach provides a distributed and tailored approach to architecture, greater flexibility through loose coupling, and deeper operational visibility into what is being built.

  

• Question 217:

  Refer to the exhibit.

  The error occurs when a project is run in Anypoint Studio. The project, which has a dependency that is not in the MuleSoft Maven repository, was created and successfully run on a different computer.

  What is the next step to fix the error to get the project to run successfully?

  

  A. Edit the dependency in the Mule project's pom.xml file
  B. Install the dependency to the computer's local Maven repository
  C. Deploy the dependency to MuleSoft's Maven repository
  D. Add the dependency to the MULE_HOME/bin folder
  B. Install the dependency to the computer's local Maven repository

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  Explanation/Reference:

  As dependency is not present in Mulesoft Maven repository, we need to install the dependency on computer's local Maven repository. Option 3 is correct choice.

• Question 218:

  Refer to the exhibits.

  

  What is written to the records.csv file when the flow executes?

  A. The JSON payload
  B. An error message
  C. Nothing
  D. The payload convert to CVS
  A. The JSON payload

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  Explanation/Reference:

  Transform Message Add write_date is coverting payload in JSON format and same JSON payload is avaialble to file write processor. However, if the payload is a different format (for example, not CSV) , you can place the transformation inside the Write operation to generate content that will be written without producing a side effect on the message in transit. This is not done in this case. By default, the connector writes whatever is in the message payload. Hence JSON payload will be written to file.

• Question 219:

  Refer to the exhibits.

  

  The Mule application does NOT define any global error handlers.

  The Validation component in the private flow throws an error

  What response message is returned to a web client request to the main flow's HTTP Listener?

  

  A. ''Child error"
  B. "Parent error"
  C. "Validation Error"
  D. "Parent completed"
  C. "Validation Error"

• Question 220:

  Refer to the exhibits.

  

  A JSON payload is set in the Set Payload transformer. What is logged by the Logger?

  A. "String"
  B. "Object"
  C. "Array"
  D. "JSON"
  B. "Object"