MuleSoft Exam MCD-Level-1 Topic 2 Question 83 Discussion

Actual exam question for MuleSoft's MCD-Level-1 exam

Question #: 83
Topic #: 2

What DataWeave expression transforms the array a to the XML output?

A1. 1. trains:
2. 2. {(
3. 3. a map ((engId, index) ->
4. 4. train: {
5. 5. TrainNumber: engId
6. 6.
7. 7. }
8. 8. )
9. 9. )}

B1. 1. trains:
2. 2. a map ((engId, index) ->
3. 3. train: {
4. 4. TrainNumber: engId
5. 5.
6. 6. }
7. 7. )

C1. 1. {(
2. 2. trains:
3. 3. a map ((engId, index) ->
4. 4. train: {
5. 5. TrainNumber: engId
6. 6.
7. 7. }
8. 8. )
9. )}

D1. 1. {
2. 2. trains:
3. 3. a map ((engId, index) ->
4. 4. train: {
5. 5. TrainNumber: engId
6. 6.
7. 7. }
8. 8. )
9. }

Show Suggested Answer

Suggested Answer: A

For such questions always look for Syntax:

I call it 'Wrap the Map'

trains:

{(

When mapping array elements (JSON or JAVA) to XML, wrap the map operations in {(..)}

-{ } are defining the object

-( ) are transforming each element in the array as a key/value pair

by Matthew at Feb 11, 2024, 09:38 PM

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Claudio

9 months ago

I'm not sure which one to choose. Both A and B seem valid to me. What do you think, Benedict and Cecilia?

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Sylvia

10 months ago

I see your point, Sage. Option B does seem more concise in transforming the array.

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Sage

10 months ago

I disagree. I believe the answer is B because it directly maps the array to XML without unnecessary brackets.

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Cecilia

10 months ago

I agree with you, Benedict. Option A seems to be the most appropriate choice.

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Benedict

10 months ago

I think the answer is A because it correctly maps the array to XML output.

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Cordelia

10 months ago

Yes, I see now. Option B makes sense. Thanks for clarifying, team!

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Alona

10 months ago

Option B has the correct syntax for transforming the array to XML output, it matches the structure needed.

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Lakeesha

10 months ago

Option C seems plausible too, let's discuss the rationale behind our choices.

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Cordelia

10 months ago

I'm not sure, I think it might be option C instead.

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Alona

11 months ago

I agree with Lakeesha, option B looks like the right DataWeave expression.

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Lakeesha

11 months ago

I think the correct answer is option B.

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