MuleSoft Certified Developer - Level 1 (Mule 4) - MCD-Level-1 Exam Questions [2026]

QUESTION NO: 1
Refer to the exhibit. This RAML fragment defines a Book data type that is used in a RAML API specification.
An API implementation is created for this RAML API specification.
What is valid JSON input for a request from a web client to an implementation of this RAML API specification?

A.

B.

C.

D.

Correct Answer: A

QUESTION NO: 2
Refer to the exhibit.

What is a valid expression for the Choice router's when expression to route events to the documenticShipping flow?

A. #[ if(payload == "US") ] B. 0#[ payload = 'US' ] C. #[ if(payload = 'US') J D. #[ payload == 'US' J

Correct Answer: D

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 3
Refer to the exhibits.

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

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

Correct Answer: C

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 4
As a part of project requirement , you want to build an API for a legacy client. Legacy client can only consume SOAP webservices. Which type the interface documentation can be prepared to meet the requirement?

A. plain text file documenting API's B. JSON file C. RAML file to define SOAP services D. WSDL file

Correct Answer: D

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 5
A company has defined two RAML fragments, Book Data Type and Book Example to be used in APIs.
What would be valid RAML to use these fragments ?

A. 1.#%RAML 1.0
2.title: Books
3.Book: bookDataType.raml
4./books:
5. post:
6. body:
7. application/json:
8. type: Book
9. examples:
10. input: bookExample.raml
11. responses:
12. 201:
13. body:
14. application/json:
15. example:
16. message: Book added B. 1.#%RAML 1.0
2.title: Books
3.Book: bookDataType.raml
4./books:
5. post:
6. body:
7. application/json:
8. type: Book
9. examples:
10. input: bookExample.raml
11. responses:
12. 201:
13. body:
14. application/json:
15. example:
16. message: Book added C. 1. #%RAML 1.0
2. title: Books
3. types:
4. Book: ABC/Examples/bookDataType.raml
5. /books:
6. post:
7. body:
8. application/json:
9. type: Book
10. examples:
11. input: ABC/Examples/bookExample.raml
12. responses:
13. 201:
14. body:
15. application/json:
16. example:
17. message: Book added D. 1.#%RAML 1.0
2.title: Books
3.Book: !include bookDataType.raml
4./books:
5. post:
6. body:
7. application/json:
8. type: Book
9. examples:
10. input: !include bookExample.raml
11. responses:
12. 201:
13. body:
14. application/json:
15. example:
16. message: Book added

Correct Answer: B

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 6
Refer to the below exhibit.
A Mule application configures a property placeholder file named config.yaml to set some property placeholders for an HTTP connector.
What is the valid properties placeholder file to set these values?

A. 1.http:
2. basepath: "api"
3. host : "localhost"
4. port : "8081" B. 1. {
2. http:
3. basePath: "api",
4. port: "8081",
5. host: " localhost" C. 1. http.host = localhost
2. http.port = 8081 D. 1.http:
2. host = "localhost"
3. port = "8081"

Correct Answer: A

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 7
Refer to the exhibits.

The main flow contains a Flow Reference component configured to call the child flow What part(s) of a Mule event passed to the Flow Reference component are available in the child flow?

A. The entire Mule event B. The payload C. The payload and all variables D. The payload and all attributes

Correct Answer: C

QUESTION NO: 8
What is the main purpose of flow designer in Design Center?

A. To design and develop fully functional Mule applications in a hosted development environment B. To define API lifecycle management in a graphical way C. To design and mock Mule application templates that must be implemented using Anypoint Studio D. To design API RAML files in a graphical way

Correct Answer: A

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 9
Refer to the exhibits.

What payload and quantity are togged at the end of the main flow?

A. [[order1, order2, order3, order4], 14] B. [[1,2,3,4], 10] C. [orderlorder2order3order4, 14] D. [[1,2,3,4], 14]

Correct Answer: D

QUESTION NO: 10
A Mule application's HTTP Listener is configured with the HTTP protocol. The HTTP listeners port attribute is configured with a property placeholder named http.port. The mule application sets the http.port property placeholder's value to 9090 The Mule application is deployed to CloudHub without setting any properties in the Runtime manager Properties tab and a log message reports the status of the HTTP listener after the Mule application deployment completes.
After the mule applications is deployed, what information is reported in the worker logs related to the port on which the Mule application's HTTP Listener listens?

A. The HTTP Listener is listening on port 8081 B. The HTTP Listener is listening on port 80 C. The HTTP Listener failed to bind to the port and is not listening for connections D. The HTTP Listener is listening on port 9090

Correct Answer: A

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 11
What valid RAML retrieves details on a specific customer by its customerId as a URI parameter?

A. 1. /customers:
2. /get:
3. /customerId: B. 1. /customers:
2. get:
3. /{customerId}: C. 1. /customers:
2. /{customerId}:
3. get: D. 1. /customers:
2. /customerId:
3. get:

Correct Answer: C

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 12
Which of the module is imported automatically in Dataweave scripts?

A. dw::Runtime B. dw::core C. dw::System D. dw::Crypto

Correct Answer: B

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 13
A
web client submits a request to http://localhost:8081?accountType=personal. The query parameter is captured using a Set Variable transformer to a variable named accountType.
What is the correct DataWeave expression to log accountType?

A. Account Type: #[message.inboundProperties.accountType] B. Account Type: #[flowVars.accountType] C. Account Type: # [attributes.accountType] D. Account Type: #[vars.accountType]

Correct Answer: D

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 14
What is output of Dataweave flatten function?

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

Correct Answer: D

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 15
What is minimal requirement in a flow for a Mule application to compile?

A. Event Source B. Source and processors both C. Event Processors D. Error handlers

Correct Answer: C

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).