Salesforce SALESFORCE-MULESOFT-DEVELOPER-I Online Practice Questions and Exam Preparation

Salesforce SALESFORCE-MULESOFT-DEVELOPER-I Online Questions & Answers

• Question 11:

  Refer to the exhibits.

  

  The main flow contains an HTTP Request. The HTTP Listeners and HTTP Request use default configurations.

  What values are accessible in the child flow after a web client submits a request to http://localhost:8081/order? col or = red?

  A. payload
  B. payload quantity var
  C. payload color query param
  D. payload quantity var color query param
  A. payload

  ---

  Explanation

• Question 12:

  Refer to the exhibits.

  

  The Set Payload transformer In the addltem subflow uses DataWeave to create an order object.

  What is the correct DataWeave code for the Set Payload transformer in the createOrder flow to use the addltem subflow to add a router cable with the price of 100 to the order?

  A. addltemf { payload: { price: "100", item: "router", itemType: "cable" } > )
  B. lookupf "addltem", { payload: { price: "100", item: "router", itemType: "cable" } } )
  C. addltemf { price: "100", item: "router", itemType: "cable" })
  D. lookupf "addltem", { price: "100", item: "router", itemType: "cable" } )
  B. lookupf "addltem", { payload: { price: "100", item: "router", itemType: "cable" } } )

  ---

  Explanation

• Question 13:

  Refer to the exhibits.

  

  All three of the conditions for the Choice router are true. What messages are written in the application log?

  A. Route1
  B. Route2
  C. Route1,Route2
  D. Route1,Route2,Default
  A. Route1

  ---

  Explanation

  Only one of the routes in the Choice router executes, meaning that the first expression that evaluates to true triggers that route1 execution and the others are not checked. If none of the expressions are true, then the default route executes. Hence only Route1 will be executed as it is the first expression. hence output of logger is Route1. MuleSoft Doc Ref : https://docs.mulesoft.com/mule-runtime/4.3/choice-router-concept The Choice router dynamically routes messages through a flow according to a set of DataWeave expressions that evaluate message content. Each expression is associated with a different routing option. The effect is to add conditional processing to a flow, similar to an if/then/else code block in most programming languages.

  Only one of the routes in the Choice router executes, meaning that the first expression that evaluates to true triggers that route's execution and the others are not checked. If none of the expressions are true, then the default route executes.

  

• Question 14:

  A web client submits a request to http://localhost:8081?flrstName=john. What is the correct DataWeave expression to access the firstName parameter?

  A. #[attributes.queryParams.firstName]
  B. #[message.queryParams.hrstName]
  C. #[message.inboundProperties.'http.query.params'.firstName]
  D. #[attributes.'http.query.params'.firstName]
  A. #[attributes.queryParams.firstName]

  ---

  Explanation

• Question 15:

  In an application network. If the implementation but not the interface of a product API changes, what needs to be done to the other APIs that consume the product API?

  A. The applications associated with the other APIs must be restarted
  B. The applications associated with the other APIs must be recoded
  C. The other APIs must be updated to consume the updated product API
  D. Nothing needs to be changed in the other APIs or their associated applications
  D. Nothing needs to be changed in the other APIs or their associated applications

  ---

  Explanation

  Correct answer is Nothing needs to be changed in the other APIs or their associated applications This is the benefit of having separate interface layer. As there are no changes to interface , no changes are required on the API's which consumes this API in context

• Question 16:

  Refer to the exhibit.

  

  The default scope in choice router recursively calls the color flow.

  A web client sends a PUT request to the HTTP listener with payload Blue.

  What response is returned to the web client?

  A. "Blk"
  B. "Green"
  C. A timeout error
  D. ["Blue", "Red", "Blk"]
  C. A timeout error

  ---

  Explanation

  Sequence can be described as follows.

  *

  When web client sends the request , it sends payload as Blue (mentioned in question)

  *

  In first iteration this will go to default choice , which sets payload to Red

  *

  Via default route , flow will call itself with payload as Red

  *

  In second iteration , as payload is Red , it will go to first route in choice router which will set payload to Blk and second iteration will end returning back payload as Blk to first iteration.

  *

  This Blk will be again set to payload and first iteration will end returning back response as Blk

• Question 17:

  A flow contains an HTTP Listener as the event source. What is the DataWeave expression to log the Content-Type header using a Logger component?

  A. #["Content-Type: " ++ attributes.headers.'content-type']
  B. #["Content-Type: " + headers.'content-type']
  C. #["Content-Type: " + attributes.headers.'content-type']
  D. #["Content-Type: " ++ headers.'content-type']
  A. #["Content-Type: " ++ attributes.headers.'content-type']

  ---

  Explanation

  Option 1 is the only correct choice due to two reasons. 1) Concatenation is always with ++ sign and not with + sign which makes option 2 and 3 wrong 2) hearders can be accessed with attributes. headers and not with only headers which makes option 4 incorrect

• Question 18:

  There are three routes configured for Scatter-Gather and incoming event has a payload is an Array of three objects. How routing will take place in this scenario?

  A. Incoming array objects would be split into three and each part would be sent to one route each in sequential manner
  B. Incoming array objects would be split into three and each part would be sent to one route each in parallel
  C. Entire event would be sent to each route sequentially
  D. Entire event would be sent to each route in parallel
  D. Entire event would be sent to each route in parallel

  ---

  Explanation

  Entire event would be sent to each route in parallel. Scatter-Gather works as follows :

  -

  The Scatter-Gather component receives a Mule event and sends a reference of this Mule event to each processing route.

  -

  Each of the processing routes starts executing in parallel. After all processors inside a route finish processing, the route returns a Mule event, which can be either the same Mule event without modifications or a new Mule event created by the processors in the route as a result of the modifications applied.

  -

  After all processing routes have finished execution, the Scatter-Gather component creates a new Mule event that combines all resulting Mule events from each route, and then passes the new Mule event to the next component in the flow.

  

• Question 19:

  Which keyword do you use to create a new function in DataWeave?

  A. function
  B. fun
  C. func
  D. map
  B. fun

  ---

  Explanation

  You can define your own DataWeave functions using the fun declaration in the header of a DataWeave script. Sample is as below. ---------------------------------------- %dw 2.0 output application/json fun toUpper(aString) = upper(aString)

  toUpper("hello")

  MuleSoft Doc Ref : https://docs.mulesoft.com/mule-runtime/4.1/dataweave-functions

• Question 20:

  Refer to the exhibits.

  

  What payload and variable are logged at the end of the main flow?

  

  A. [[5, 10, 15, 20], 1]
  B. [[5, 10, 15, 20], 5]
  C. [[Req5, Req10, Req15, Req20], 5]
  D. [Req5Req10,Req15Req20, 5]
  B. [[5, 10, 15, 20], 5]

  ---

  Explanation

  Key thing to note here is that any changes made to payload in for each loop are not available outside for each scope where as variable value updated in for each loop is visible out side for each loop too. In this example , sequence can be described as follows 1) Payload is set to the value [5, 10, 15, 20] 2) Variable is set to the value of 1 3) For each loop is executed four times and in each loop payload value is updated to append "Req" and variable is count is increased by 1 4) Once control comes out of for each , payload changes made within for each are not visible. Hence payload at this point of time is equal to payload available before entering for each loop which was [5, 10, 15, 20]. Similarly variable value updated in for each loop is also available outside hence variable value is 5 as it was updated in loop. 5) Hence correct answer is [[5, 10, 15, 20], 5] For Each Scope The For Each scope splits a payload into elements and processes them one by one through the components that you place in the scope. It is similar to a for-each/for loop code block in most programming languages and can process any collection, including lists and arrays. The collection can be any supported content type, such as application/json, application/java, or application/xml. General considerations about the For Each scope: By default, For Each tries to split the payload. If the payload is a simple Java collection, the For Each scope can split it without any configuration. The payload inside the For Each scope is each of the split elements. Attributes within the

  original message are ignored because they are related to the entire message.

  For Each does not modify the current payload. The output payload is the same as the input.

  For non-Java collections, such as XML or JSON, use a DataWeave expression to split data. Use the Collection field for this purpose.