Mulesoft MCD-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCD-LEVEL1 Online Questions & Answers

• Question 11:

  Refer to the exhibits. The updateTemp and getTemp flows share the same default object store.

  

  A web client sends one GET request to the test flow's HTTP Listener, which causes the test flow to call the updateTemp flow. After the test flow returns a response, the web client then sends a different GET request to the getTemp flow's HTTP Listener. The test flow is not called a second time.

  What response is returned from the request to the getTemp flow's HTTP Listener?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  B. Option B

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  Explanation/Reference:

• Question 12:

  Refer to the exhibit.

  

  What Database expression transforms the input to the output?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  B. Option B

• Question 13:

  What is the output of Dataweave Map operator?

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

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  Explanation/Reference:

  Returns an array that is the result of applying a transformation function (lambda) to each of the elements.

  MuleSoft Doc Ref : https://docs.mulesoft.com/mule-runtime/4.3/dataweave-cookbook-map

  The map operator is a function in Dataweave which iterates over the items in an array and outputs them into a new array. It basically accepts input as a list of items in an array and manipulates the items in the array in order to form a new

  array as an output.

  I have created below chart for your easier understanding:

  

• Question 14:

  What is the correct Syntax to add a customer ID as a URI parameter in the HTTP listener's path attribute?

  

  A. #[customerID]
  B. $[customerID]
  C. {customerID}
  D. (customerID)
  C. {customerID}

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  Explanation/Reference:

  URL parameters are always accessed using { } like => {customerID}

• Question 15:

  Refer to the exhibits. A web client submits a request to http://localhost:8081/fliqhts?destination=SFO and the Web Service Consumer throws a WSC:BAD_REQUEST error.

  What is the next step to fix this error?

  

  A. Set a header In the Consume operation equal to the destination query parameter
  B. set a SOAP payload before the Consume operation that contains the destination query parameter
  C. set a property m the Consume operation equal to the destination query parameter
  D. set a JSON payload before the Consume operation that contains the destination query parameter
  A. Set a header In the Consume operation equal to the destination query parameter
  B. set a SOAP payload before the Consume operation that contains the destination query parameter
  C. set a property m the Consume operation equal to the destination query parameter

• Question 16:

  Refer to the exhibits.

  

  The main flow contains a Flow Reference to the child flow.

  A web client sends a GET request to the main flow's HTTP Listener that includes a make query parameter.

  What values are accessible in the child flow?

  A. payload
  B. payload make query param
  C. payload model var
  D. payload make query param model var
  D. payload make query param model var

• Question 17:

  A Database On Table Row listener retrieves data from a CUSTOMER table that contains a primary key userjd column and an increasing kxjin_date_time column. Neither column allows duplicate values.

  How should the listener be configured so it retrieves each row at most one time?

  A. Set the watermark column to the bgin_date_time column
  B. Set the target value to the last retrieved login_date_time value
  C. Set the target value to the last retrieved user_jd value
  D. Set the watermark column to the user_Id column
  A. Set the watermark column to the bgin_date_time column

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  Explanation/Reference:

  1.

  Watermark allows the poll scope to poll for new resources instead of getting the same resource over and over again.

  2.

  The database table must be ordered so that the "watermark functionality" can move effectively in the ordered list. Watermark stores the current/last picked up "record id."

  3.

  If the Mule application is shut down, it will store the last picked up "record id" in the Java Object Store and the data will continue to exist in the file. This watermark functionality is valuable and enables developers to have increased transparency.

  4.

  Developers do not need to create code to handle caching; it is all configurable!

  5.

  There are two columns and both are unique but user_id can't guaranty sequence whereas date_time will always be in increasing order and table content can easily be ordered on the basis of last processed date_time. So correct answer is: Set the watermark column to the date_time column

• Question 18:

  What happens to the attributes of a Mule event in a flow after an outbound HTTP Request is made?

  A. Attributes are replaced with new attributes from the HTTP Request response (which might be null)
  B. New attributes may be added from the HTTP response headers, but no headers are ever removed
  C. Attributes do not change
  D. Previous attributes are passed unchanged
  A. Attributes are replaced with new attributes from the HTTP Request response (which might be null)

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  Explanation/Reference:

  Attributes are replaced with new attributes from the HTTP Request response. Attributes include everything apart from Payload/body. For ex: Headers, query parameters, URI parameters. So, when outbound HTTP request is made, new

  attributes need to pass the outbound HTTP request and old attributes are replaced.

  I have created below diagram to make it easy for you to understand:

  

• Question 19:

  Refer to the exhibit.

  

  This RAML specification includes a resource and method to retrieve accounts by account_type and industry. What is the correct URI to get all retail finance accounts?

  A. /accounts/retail/finance
  B. /accounts?account_type=retailandindustry=finance
  C. /accounts/account_type=retail/industry=finance
  D. /accounts?account_type:retailandindustry:finance
  B. /accounts?account_type=retailandindustry=finance

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  Explanation/Reference:

  Correct answer is /accounts?account_type=retailandindustry=finance

• Question 20:

  Refer to the exhibits. In the color flow , both the variable named color and payload are set to "red".

  An HTTP POST request is then sent to the decideColor flow's HTTP Listener.

  What is the payload value at the Logger component after the HTTP request completes?

  

  

  A. white
  B. red
  C. blue
  D. Error message
  C. blue

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  Explanation/Reference:

  Correct answer is white. Key thing to note here is that variables are not available to the called flow when it is invoked using HTTP request. So the flow goes like below 1) Color variable is set to red 2) Payload is set to red 3) Child flow is called using HTTP request which means variables are not available in called flow (They would have been if flow reference activity would have been used) 4) Hence set payload activity will set payload to white as color variable is null 5) Payload returned in main flow is white. 6) So finally output of logger is white