🔹 MuleSoft Mule 4 MCQs (Set 1)

1. Which language is used in Mule 4 for data transformation?

A) MEL
B) JavaScript
C) DataWeave
D) XSLT
✅ Answer: C) DataWeave

2. What does a Mule event consist of in Mule 4?

A) Payload only
B) Payload and metadata
C) Payload and flow variables
D) Message and variables
✅ Answer: D) Message and variables

3. What is the default payload format in HTTP Listener if not specified?

A) XML
B) JSON
C) Plain Text
D) Binary
✅ Answer: C) Plain Text

4. Which connector is used to expose REST APIs in MuleSoft?

A) FTP
B) Database
C) HTTP Listener
D) VM
✅ Answer: C) HTTP Listener

5. What is the function of the "Logger" component in MuleSoft?

A) Generate reports
B) Log messages to console or log file
C) Schedule tasks
D) Transform data
✅ Answer: B) Log messages to console or log file
6. What does the “On Error Propagate” scope do?
A) Ignores the error
B) Handles the error silently
C) Propagates error to the caller flow
D) Sends success response
✅ Answer: C) Propagates error to the caller flow

7. Which of the following is true about DataWeave 2.0 in Mule 4?

A) It supports MEL syntax
B) It replaces MEL
C) It can only output JSON
D) It is not functional
✅ Answer: B) It replaces MEL

8. In Mule 4, what is the correct file extension for DataWeave scripts?

A) .xml
B) .dw
C) .dwl
D) .txt
✅ Answer: C) .dwl

9. What is the purpose of a Global Element?

A) To create a local variable
B) To stop a flow
C) To define reusable configurations
D) To create RAML
✅ Answer: C) To define reusable configurations

10. Which deployment model uses dedicated Mule runtimes managed by the customer?
A) CloudHub
B) Runtime Fabric
C) On-premise
D) API Manager
✅ Answer: C) On-premise

11. What is the default language used in Mule 4 expression components?

A) MEL
B) Java
C) DataWeave
D) Groovy
✅ Answer: C) DataWeave

12. What is a Flow Reference component used for?

A) Error handling
B) Reference another flow
C) Loop through payload
D) Send emails
✅ Answer: B) Reference another flow

13. Which of the following can NOT be directly transformed using DataWeave?
A) XML
B) JSON
C) CSV
D) HTML
✅ Answer: D) HTML

14. In Anypoint Studio, what is the primary use of the Palette panel?
A) Managing APIs
B) Writing DataWeave
C) Drag-and-drop components
D) Monitoring logs
✅ Answer: C) Drag-and-drop components

15. What happens when an error occurs in a Try scope with no error handler defined?
A) Flow stops
B) Error is logged only
C) Error is ignored
D) Error is automatically handled
✅ Answer: A) Flow stops

16. What is the purpose of Anypoint Exchange?

A) Deploy applications
B) Build RAML APIs
C) Share reusable assets
D) Transform data
✅ Answer: C) Share reusable assets
17. What does a “payload” keyword represent in Mule 4?
A) Incoming parameters
B) Complete event
C) Message body
D) Flow variable
✅ Answer: C) Message body

18. Which policy is used to restrict access to APIs in API Manager?

A) Batch policy
B) Rate limiting policy
C) Transform policy
D) Logging policy
✅ Answer: B) Rate limiting policy

19. What tool is used to monitor Mule applications?

A) RAML Console
B) Runtime Manager
C) Design Center
D) Exchange
✅ Answer: B) Runtime Manager

20. What is the minimum RAML requirement for an API definition?

A) title and baseUri
B) version and host
C) endpoint and method
D) flow and connector
✅ Answer: A) title and baseUri

21. What connector is used to send data between different Mule apps?
A) HTTP
B) FTP
C) VM
D) SFTP
✅ Answer: C) VM

22. Which of the following is true about Mule 4 event processing?

A) Mutable by default
B) Mutable only in subflows
C) Immutable
D) Requires threading
✅ Answer: C) Immutable

23. Which tool is used to design RAML in Anypoint Platform?

A) Exchange
B) API Manager
C) Design Center
D) Runtime Manager
✅ Answer: C) Design Center

24. What is used to define externalized values (like passwords)?

A) XML tags
B) Property placeholders
C) Logger
D) Java class
✅ Answer: B) Property placeholders

25. Which scope allows parallel processing in Mule 4?

A) Async
B) Try
C) Until Successful
D) Flow Reference
✅ Answer: A) Async
🔹 MuleSoft Mule 4 – Advanced MCQs (Set 2)

1. What is the purpose of the until-successful scope in Mule 4?

A) Executes a block only once
B) Repeats execution until it succeeds or max retries are reached
C) Executes only when an error occurs
D) Executes only if payload is empty
✅ Answer: B) Repeats execution until it succeeds or max retries are reached

2. What is a Mule Domain Project used for?

A) Deploy APIs
B) Monitor applications
C) Share resources like connectors across projects
D) Create database schemas
✅ Answer: C) Share resources like connectors across projects

3. What is the default behavior of the Batch Job in MuleSoft?

A) Parallel execution
B) Synchronous execution
C) Persistent and asynchronous
D) Only used in CloudHub
✅ Answer: C) Persistent and asynchronous

4. Which scope is best suited for splitting and processing large collections in parallel?
A) For Each
B) Batch
C) Scatter-Gather
D) Try
✅ Answer: C) Scatter-Gather

5. How does MuleSoft secure application secrets?

A) Logging
B) API policies
C) Secure Property Placeholder
D) Runtime Manager
✅ Answer: C) Secure Property Placeholder
6. What format is supported by Mule Property Files for externalized configs?
A) JSON
B) XML
C) .properties
D) YAML
✅ Answer: C) .properties

7. What happens when a flow contains a Flow Reference but the referenced flow has an
error?
A) Main flow continues
B) Application stops
C) Error propagates to calling flow
D) Error is ignored
✅ Answer: C) Error propagates to calling flow

8. Which tool helps you test RAML specifications?

A) API Console
B) Runtime Manager
C) Exchange
D) Scheduler
✅ Answer: A) API Console

9. What is a common use case for VM Connector?

A) Sending mail
B) File transfer
C) Inter-app communication within the same Mule runtime
D) Exposing APIs
✅ Answer: C) Inter-app communication within the same Mule runtime

10. What is the purpose of the choice router in Mule?

A) Transform messages
B) Call another API
C) Route messages based on conditions
D) Authenticate users
✅ Answer: C) Route messages based on conditions

11. What type of object is returned by transform in Mule 4?

A) Java Object
B) POJO
C) Message
D) Payload
✅ Answer: D) Payload

12. Which of the following is used to paginate records in Mule 4?

A) For Each
B) Repeat
C) Auto Paging in connectors
D) Splitter
✅ Answer: C) Auto Paging in connectors

13. What is the correct syntax to set a variable in Mule 4?

A) set-variable name="xyz" value="#[payload]"
B) setVar
C) variable name="payload"
D) #[var.payload]
✅ Answer: A) set-variable name="xyz" value="#[payload]"

14. What is the primary purpose of the Scheduler component in Mule?

A) To call APIs
B) To manage RAML
C) To trigger flows periodically
D) To manage exceptions
✅ Answer: C) To trigger flows periodically

15. Which of these is used to manage API analytics?

A) Exchange
B) API Designer
C) API Manager
D) Runtime Fabric
✅ Answer: C) API Manager

16. What is a policy in API Manager?

A) A RAML rule
B) A deployment option
C) A rule applied to manage API behavior
D) A way to create flows
✅ Answer: C) A rule applied to manage API behavior
17. How is a custom policy created in MuleSoft?
A) Using Java
B) Using XML
C) Using Policy Editor in API Manager
D) Through Exchange only
✅ Answer: C) Using Policy Editor in API Manager

18. Which connector is used to read/write to FTP/SFTP servers?

A) HTTP
B) FTP
C) VM
D) JMS
✅ Answer: B) FTP

19. Which logging level displays minimal information (errors only)?

A) DEBUG
B) TRACE
C) INFO
D) ERROR
✅ Answer: D) ERROR

20. What is the default path of application logs in CloudHub?

A) /opt/logs
B) /cloudhub/logs
C) /var/logs
D) /logs
✅ Answer: D) /logs

21. Which module is used to interact with email servers?

A) HTTP
B) Email
C) TCP
D) JMS
✅ Answer: B) Email

22. How do you test a MuleSoft API from Anypoint Studio?

A) Postman
B) API Console
C) DataWeave Editor
D) Exchange
✅ Answer: B) API Console

23. What type of application can you deploy on CloudHub?

A) WAR
B) EAR
C) JAR
D) DLL
✅ Answer: C) JAR

24. What is the main benefit of Experience APIs in API-led connectivity?

A) Data encryption
B) System communication
C) User-specific views
D) Error handling
✅ Answer: C) User-specific views

25. How do you add a new policy to a deployed API?

A) Through API Console
B) Via Runtime Manager
C) Through API Manager
D) Inside Anypoint Studio
✅ Answer: C) Through API Manager
🔹 MuleSoft Mule 4 – Basic MCQs (Set 3)

1. What is MuleSoft primarily used for?

A) Web development
B) Image processing
C) Application integration
D) Data visualization
✅ Answer: C) Application integration

2. What does an API define?

A) Data source
B) UI design
C) Rules for interaction between software components
D) Log reports
✅ Answer: C) Rules for interaction between software components

3. What is the default port for HTTP Listener in Mule 4?

A) 9090
B) 443
C) 8081
D) 3306
✅ Answer: C) 8081

4. What is Anypoint Studio?

A) A web server
B) A database engine
C) An IDE for building Mule applications
D) A monitoring tool
✅ Answer: C) An IDE for building Mule applications

5. What does the .dwl file extension stand for?

A) DataWeave Language
B) DataWeave Log
C) Developer Work Log
D) Data Worker Language
✅ Answer: A) DataWeave Language
6. What is a Mule Flow?
A) A web service
B) A sequence of steps to process data
C) A database schema
D) A policy definition
✅ Answer: B) A sequence of steps to process data

7. Which component is used to log messages in MuleSoft?

A) Logger
B) Console
C) Output
D) Printer
✅ Answer: A) Logger

8. Which MuleSoft product allows API monitoring and policies?

A) Runtime Manager
B) API Designer
C) API Manager
D) Design Center
✅ Answer: C) API Manager

9. What is the purpose of DataWeave in Mule 4?

A) Network routing
B) User authentication
C) Data transformation
D) Log aggregation
✅ Answer: C) Data transformation

10. In MuleSoft, what does HTTP Listener do?

A) Starts a database
B) Sends emails
C) Receives HTTP requests
D) Runs a loop
✅ Answer: C) Receives HTTP requests

11. Which format is NOT supported by DataWeave?

A) JSON
B) XML
C) CSV
D) MP4
✅ Answer: D) MP4

12. Where do you define external configuration values?

A) Exchange
B) RAML
C) Properties file
D) Logger
✅ Answer: C) Properties file

13. What is the purpose of “Set Variable” in MuleSoft?

A) Initialize environment
B) Declare a flow
C) Store a temporary value
D) Set up a server
✅ Answer: C) Store a temporary value

14. Which scope catches errors within its block?

A) Try
B) Async
C) VM
D) Choice
✅ Answer: A) Try

15. MuleSoft can be integrated with which of the following?

A) Databases
B) SaaS applications
C) On-premise apps
D) All of the above
✅ Answer: D) All of the above

16. What is the output of a Logger by default?

A) Email
B) Console and log file
C) API response
D) CSV file
✅ Answer: B) Console and log file
17. Which of the following is NOT a MuleSoft connector?
A) FTP
B) Salesforce
C) MySQL
D) Notepad
✅ Answer: D) Notepad

18. What is a subflow in MuleSoft?

A) A reusable flow that does not have its own error handler
B) A type of API
C) A data transformation rule
D) A static page
✅ Answer: A) A reusable flow that does not have its own error handler

19. What is CloudHub?

A) A local IDE
B) An API testing tool
C) MuleSoft’s cloud-based deployment platform
D) A file manager
✅ Answer: C) MuleSoft’s cloud-based deployment platform

20. What is the default output format of DataWeave when not specified?
A) CSV
B) Plain Text
C) JSON
D) XML
✅ Answer: C) JSON

21. What is the purpose of Choice router?

A) Delay processing
B) Create logs
C) Route based on conditions
D) Store data
✅ Answer: C) Route based on conditions

22. What is a payload in MuleSoft?

A) The application name
B) An API version
C) The message body being processed
D) The database name
✅ Answer: C) The message body being processed

23. What is the main purpose of API policies?

A) Branding
B) API performance monitoring
C) Control API behavior like security and rate limits
D) Data formatting
✅ Answer: C) Control API behavior like security and rate limits

24. What is a Mule Event?

A) Error log
B) Application name
C) A unit of data that travels through a flow
D) RAML contract
✅ Answer: C) A unit of data that travels through a flow

25. What is the purpose of the "Transform Message" component?

A) Store files
B) Configure servers
C) Change the format or structure of the message
D) Log the error
✅ Answer: C) Change the format or structure of the message