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MuleSoft MCD-Level-1 Exam Syllabus Topics:

Section	Weight	Objectives
Testing, Debugging & Deployment	15%	- Application deployment to CloudHub - Deployment best practices - Debugging in Anypoint Studio
MuleSoft Fundamentals & Anypoint Platform	10%	- API lifecycle management - API-led connectivity concepts - Anypoint Platform architecture and components
DataWeave Transformations	20%	- Payload and attribute manipulation - Data format conversion - DataWeave syntax and expressions
Error Handling & Logging	15%	- Default error handling - Custom error handlers - Logging and monitoring
Mule Application Development	25%	- Connectors and transports - Properties and configuration - Flow construction and components
API Design & Implementation	15%	- RESTful interface implementation - RAML-based API definition - APIkit usage

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MuleSoft Certified Developer - Level 1 (Mule 4) Sample Questions (Q68-Q73):

NEW QUESTION # 68
What DataWeave expression transforms the array a to the XML output?

A. 1.1. {
2.2. trains:
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.}
B. 1.1. {(
2.2. trains:
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.)}
C. 1.1. trains:
2.2. a map ((engId, index) ->
3.3. train: {
4.4. TrainNumber: engId
5.5.
6.6. }
7.7. )
D. 1.1. trains:
2.2. {(
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.9. )}

Answer: D

Explanation:
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

NEW QUESTION # 69
In the Database On Table Row operation, what does the Watermark column enable the On Table Row operation to do?

A. To save the most recent records retrieved from a database to enable database caching
B. To avoid duplicate processing of records in a database.
C. To enable duplicate processing of records in a database
D. To delete the most recent records retrieved from a database to enable database caching

Answer: B

Explanation:
The correct answer is To avoid duplicate processing of records in a database.
If a watermark column is provided, the values taken from that column are used to filter the contents of the next poll, so that only rows with a greater watermark value are returned. If an ID column is provided, this component automatically verifies that the same row is not picked twice by concurrent polls.
Mule doc reference : https://docs.mulesoft.com/db-connector/1.8/database-documentation#listener

NEW QUESTION # 70
What is the output type of the DataWeave map operator?

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

Answer: C

NEW QUESTION # 71
Why would a Mule application use the ${http.port} property placeholder for its HTTP Listener port when it is deployed to CloudHub?

A. Allows CloudHub to automatically register the application with API Manager
B. Allows MuleSoft Support to troubleshoot the application by connecting directly to the HTTP Listener
C. Allows clients to VPN directly to the application at the Mule application's configured HTTP port
D. Allows CloudHub to automatically change the HTTP port to allow external clients to connect to the HTTP Listener

Answer: D

NEW QUESTION # 72
Refer to the exhibit.

What Database expression transforms the input to the output?
A)

B)

C)

D)

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

Answer: D

NEW QUESTION # 73
......

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