MuleSoft MCD-Level-1 Exam Questions Are Out: Download And Prepare [2026]

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MuleSoft MCD-Level-1 Exam Syllabus Topics:

SectionObjectives
Routing and Error Handling- Error handling
  • 1. Global error handler
  • 2. On Error Continue vs Propagate
- Event routing
  • 1. Scatter-Gather router
  • 2. Choice router
API Design and Consumption- RAML and API Designer
  • 1. Define API resources
  • 2. Use query vs URI parameters
Mule Events and Data Transformation- Mule Event Concepts
  • 1. Use DataWeave expressions
  • 2. Event payloads and variables
Application Network Basics- Modern API concepts
  • 1. API lifecycle
  • 2. API-led connectivity principles
- C4E and application networks
  • 1. Role of Center for Enablement (C4E)
  • 2. Benefits of API-led connectivity
Application Structure and Flows- Flow design
  • 1. Private flows and subflows
  • 2. Flow references and persistence
Using Connectors and Processing Records- Connectors
  • 1. HTTP and REST connectors
  • 2. Database connector usage
- Record processing
  • 1. Batch processing basics
  • 2. Handling records
Deployment and Management- Deployment topics
  • 1. Managing APIs and integrations
  • 2. Deploying Mule applications

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MuleSoft Certified Developer - Level 1 (Mule 4) Sample Questions (Q126-Q131):

NEW QUESTION # 126
Refer to the exhibits.


A
web client submits a request to http://localhQst:8081. What is the structure of the payload at the end of the flow?

Answer: C

Explanation:
Scatter-Gather Router
The Scatter-Gather component is a routing event processor that processes a Mule event through different parallel processing routes that contain different event processors. Each route receives a reference to the Mule event and executes a sequence of one or more event processors. Each of these routes uses a separate thread to execute the event processors, and the resulting Mule event can be either the same Mule event without modifications or a new Mule event with its own payload, attributes, and variables. The Scatter-Gather component then combines the Mule events returned by each processing route into a new Mule event that is passed to the next event processor only after every route completes successfully.
The Scatter-Gather component executes each route in parallel, not sequentially. Parallel execution of routes can greatly increase the efficiency of your Mule application and may provide more information than sequential processing.
Mule Ref Doc : https://docs.mulesoft.com/mule-runtime/4.3/scatter-gather-concept


NEW QUESTION # 127
Refer to the exhibit.

What DataWeave expression transforms the conductorlds array to the XML output?
A)

B)

C)

D)

Answer: A


NEW QUESTION # 128
Refer to the exhibits. A web client sends a POST request to the HTTP Listener and the Validation component in the Try scope throws an error.
What response message is returned to the web client?

Answer: A

Explanation:


NEW QUESTION # 129
There are three routes configured for Scatter-Gather and incoming event has a payload is an Array of three objects. How routing will take place in this scenario?

Answer: B

Explanation:
Entire event would be sent to each route in parallel.
Scatter-Gather works as follows :
- The Scatter-Gather component receives a Mule event and sends a reference of this Mule event to each processing route.
- Each of the processing routes starts executing in parallel. After all processors inside a route finish processing, the route returns a Mule event, which can be either the same Mule event without modifications or a new Mule event created by the processors in the route as a result of the modifications applied.
- After all processing routes have finished execution, the Scatter-Gather component creates a new Mule event that combines all resulting Mule events from each route, and then passes the new Mule event to the next component in the flow.


NEW QUESTION # 130
Refer to the exhibits.

The Mule application does NOT define any global error handlers.
The Validation component in the private flow throws an error
What response message is returned to a web client request to the main flow's HTTP Listener?

Answer: A


NEW QUESTION # 131
......

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