Free MCD - Level 1 Sample Questions — MuleSoft Certified Developer - Level 1 (Mule 4)

MuleSoft Certified Developer - Level 1 (Mule 4) (MCD - Level 1) is a level 1-level Mulesoft certification exam. The blueprint splits the exam across 5 domains, starting with API Design, Mule Application Development, DataWeave. On exam day you face around 60 questions in 120 minutes, in formats such as multiple-choice. The 20 questions below are free samples written to match that style: answer each one first, then reveal the correct answer and note which topics you miss. The MCD - Level 1 is rated medium in difficulty, and most candidates prepare with at least 6 months of hands-on experience. Because every answer is revealed in place, you can work through the whole set without leaving this page. Work through all 20 samples before deciding whether to buy the full 80+ question PDF.

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Question 1

How would you debug Mule applications?

  • A. Using breakpoints
  • B. Checking RAML
  • C. By Deploying apps on production
  • D. Cannot do it
Show Answer
Correct Answer:
A. Using breakpoints
Question 2

An organization's Center for Enablement (CAE) has built foundational assets (API specifications and implementation template, common frameworks, and best practices guides) and published them to Anypoint Exchange. What is a metric related to these foundational assets that helps the organization measure the success of its C4E efforts?

  • A. Correlation of key performance indicators (KPIs) of production applications with foundational assets
  • B. Correlation of each foundational asset with the counts of developers that downloaded each asset
  • C. Utilization counts of foundational assets in production applications
  • D. Counts of how many lines of businesses (LoBs) consumed each foundational asset
Show Answer
Correct Answer:
C. Utilization counts of foundational assets in production applications
Question 3

How to import Core (dw::Core) module into your DataWeave scripts?

  • A. import dw::core
  • B. Not needed
  • C. None of these
  • D. import core
Show Answer
Correct Answer:
B. Not needed
Question 4

What is the output type of the DataWeave map operator?

  • A. Object
  • B. Array
  • C. Map
  • D. String
Show Answer
Correct Answer:
B. Array
Question 5

How does Runtime Manager Console connect with App Data and Logs of a Mule app?

  • A. None of these
  • B. Integration Apps
  • C. CloudHub Workers
  • D. Rest API
Show Answer
Correct Answer:
C. CloudHub Workers
Question 6

What HTTP method in a RESTful web service is typically used to completely replace an existing resource?

  • A. GET
  • B. PATCH
  • C. POST
  • D. PUT
Show Answer
Correct Answer:
D. PUT
Question 7

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 change the HTTP port to allow external clients to connect to the HTTP Listener
  • B. Allows clients to VPN directly to the application at the Mule application's configured HTTP port
  • C. Allows MuleSoft Support to troubleshoot the application by connecting directly to the HTTP Listener
  • D. Allows CloudHub to automatically register the application with API Manager
Show Answer
Correct Answer:
A. Allows CloudHub to automatically change the HTTP port to allow external clients to connect to the HTTP Listener
Question 8

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

  • A. function
  • B. fun
  • C. func
  • D. None of these
Show Answer
Correct Answer:
B. fun
Question 9

What DataWeave 2.0 type can be used as input to a mapObject operation?

  • A. Array
  • B. Object
  • C. String
  • D. Map
Show Answer
Correct Answer:
B. Object
Question 10

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 enable duplicate processing of records in a database
  • C. To avoid duplicate processing of records in a database
  • D. To delete the most recent records retrieved from a database to enable database caching
Show Answer
Correct Answer:
C. To avoid duplicate processing of records in a database
Question 11

Where does a deployed flow designer application run in Anypoint Platform?

  • A. CloudHub worker
  • B. API Manager
  • C. Design Center
  • D. Exchange
Show Answer
Correct Answer:
A. CloudHub worker
Question 12

A web client sends a request to http://localhost:8081?dept=sales. What is the correct DataWeave expression to access the value of dept?

  • A. attributes.queryParams.dept
  • B. attributes.dept
  • C. message.queryParams.dept
  • D. vars.dept
Show Answer
Correct Answer:
A. attributes.queryParams.dept
Question 13

What statement is a part of MuleSoft's description of an application network?

  • A. Creates and manages high availability and fault tolerant services and infrastructure
  • B. Creates reusable APIs and assets designed to be consumed by other business units
  • C. Creates and manages a collection of JMS messaging services and infrastructure
  • D. Leverages Central IT to deliver complete point-to-point solutions with master data management
Show Answer
Correct Answer:
B. Creates reusable APIs and assets designed to be consumed by other business units
Question 14

A Scatter-Gather processes a number of separate HTTP requests. Each request returns a Mule event with a JSON payload. What is the final output of the Scatter-Gather?

  • A. An Object containing all Mule event Objects
  • B. An Array containing all Mule event Objects
  • C. None of these
  • D. The last Mule event object
Show Answer
Correct Answer:
A. An Object containing all Mule event Objects
Question 15

What is the use of API Notebooks?

  • A. None of these
  • B. Test Policies
  • C. Test API functions
  • D. Test RAML
Show Answer
Correct Answer:
C. Test API functions
Question 16

How is policy defined in terms of classloader of an API?

  • A. Classloader isolation does not exist between the application, the runtime and connectors, and policies
  • B. Classloader isolation exists between the application, the runtime and connectors, and policies
  • C. None of these
  • D. Classloader isolation partially exists between the application, the runtime and connectors, and policies
Show Answer
Correct Answer:
B. Classloader isolation exists between the application, the runtime and connectors, and policies
Question 17

An API specification is designed using RAML. What is the next step to create a REST Connector from this API specification?

  • A. Add the specification to a Mule project's src/main/resources/api folder
  • B. Implement the API specification using flow designer in Design Center
  • C. Download the API specification and build the interface using APIkit
  • D. Publish the API specification to Anypoint Exchange
Show Answer
Correct Answer:
D. Publish the API specification to Anypoint Exchange
Question 18

What are the features of CloudHub Fabric?

  • A. Non-persistent queue
  • B. Horizontal Scaling
  • C. VPN Mock Services
  • D. None of these
Show Answer
Correct Answer:
B. Horizontal Scaling
Question 19

Where are values of query parameters stored in the Mule event by the HTTP Listener?

  • A. Payload
  • B. Attributes
  • C. Inbound Properties
  • D. Variables
Show Answer
Correct Answer:
B. Attributes
Question 20

What is the difference between a subflow and a sync flow?

  • A. Sync flow has no error handling of its own and subflow does
  • B. Subflow has no error handling of its own and sync flow does
  • C. Subflow is synchronous and sync flow is asynchronous
  • D. No difference
Show Answer
Correct Answer:
B. Subflow has no error handling of its own and sync flow does

MCD - Level 1 sample questions FAQ

Are these MCD - Level 1 sample questions from the real exam?

No. They are original practice questions written to match the format and topic mix of the MuleSoft Certified Developer - Level 1 (Mule 4) exam, which contains around 60 questions. Treat them as representative practice, not leaked exam content.

How many free MCD - Level 1 sample questions do I get?

This page includes 20 questions, each with its correct answer you can reveal in place. The full study PDF expands that to 80+ questions.

Do the sample questions include the correct answers?

Yes. Open the answer panel under each question to see which option is correct. Answer first, then reveal, so the set works as a self-check rather than a reading exercise.

Is 20 sample questions enough to pass the MCD - Level 1?

Not on its own. Use the samples to find weak topics, revise them against the official domains, then work through the full 80+ question set under timed conditions before booking the exam.

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