MuleSoft Certified Developer – Level 1 (Mule 4) Exam

Demonstrate your skills in Anypoint Platform and Anypoint Studio with the official MuleSoft Certified Developer – Level 1 (Mule 4) exam.


MuleSoft Certified Development – Level 1

Showcase your ability as a developer with the MuleSoft Certified Developer – Level 1 (Mule 4) exam.

This certification displays your ability to work on basic Mule 4 projects with guidance and supervision.

The MuleSoft Certified Developer – Level 1 (Mule 4) exam tests your proficiency at designing, building, testing, debugging, deploying, and managing basic APIs and integrations while moving between Anypoint Platform to Anypoint Studio.


Certification Objectives

Take the MuleSoft Certified Developer – Level 1 (Mule 4) exam to show your knowledge of:

  • the benefits of application networks and API-led connectivity
  • using Anypoint Exchange as a central repository for the discovery and reuse of assets
  • using flow designer to build integration apps that consume APIs from Exchange and transform data
  • using API designer to define APIs with RAML and make them discoverable by adding them to Exchange
  • using Anypoint Studio to build APIs that connect to databases and transform data with DataWeave
  • deploying API implementations to CloudHub
  • using API Manager to create and deploy API proxies that govern access to APIs

MuleSoft Certified Developer – Level 1 (Mule 4) Exam: Format

  • the MuleSoft Certified Developer – Level 1 (Mule 4) exam can be taken a maximum of five times, with a 24-hour wait between each attempt

  • format: multiple-choice, closed book, proctored online or in a testing centre
  • length: 60 questions
  • duration: 120 minutes (two hours)
  • pass score: 70 percent
  • language: English

Delivery Methods

You can choose to take the MuleSoft Certified Developer – Level 1 (Mule 4) exam in-person at a testing centre or online using a web camera, administered via the Kryterion Webassessor testing platform.

If you choose in-person at a Kryterion Testing Centre:

  • over 1000 locations worldwide
  • onsite instructions
  • a test-taker guide

If you choose online using the Kryterion Webassessor testing platform:

  • requires a webcam – a laptop webcam can be used, an external camera is not required
  • requires internet connectivity with 1 Mbps upload, 1 Mbps download, jitter <50ms, ping <200ms
  • use the tool to determine your internet speed and reliability
  • online instructions
  • a test-taker guide

If you think your connection might be unreliable, we recommend you choose a testing centre instead. An unreliable connection may cause you to be expelled from the exam.

Exam Preparation

  • MuleSoft Certified Developer – Level 1 (Mule 4) exam takers can best prepare by taking the instructor-led Anypoint Platform Development: Fundamentals (Mule 4) course
  • candidates should be familiar with all the course content and be able to apply it before taking the exam

MuleSoft Certified Developer – Level 1 (Mule 4) Exam: Topics

In the topics below, DEV:FUN4 refers to the instructor-led or self-study version of the Anypoint Platform Development: Fundamentals (Mule 4) course, while DEV:DIY4 refers to the MCD – Level 1 / Development Fundamentals (Mule 4) Self-Assessment Quiz & DIY Exercises materials.

The exam demonstrates proficiency in the following tasks:


Explaining Application Network Basics Resources

  • explain MuleSoft’s proposal for closing the IT delivery gap
  • describe the role and characteristics of the “modern API”
  • describe the purpose and roles of a C4E
  • define and describe the benefits of API-led connectivity and application networks
  • define and correctly use the terms API, API implementation, API interface, API consumer, and API invocation
  • describe the basics of the HTTP protocol and characteristics of requests and responses
  • describe the capabilities and high-level components of Anypoint Platform for the API lifecycle
  • DEV:FUN4 Module 1
  • DEV:FUN4 Module 2

Designing and Consuming APIs

  • describe the lifecycle of the “modern API”
  • use RAML to define API resources, nested resources, and methods
  • identify when and how to define query parameters vs URI parameters
  • use RAML to define API parameters, requests, and responses
  • use RAML to define reusable data types and format independent examples
  • read a RAML spec and formulate RESTful requests with query parameters and/or headers as appropriate
  • DEV:FUN4 Module 3
  • DEV:DIY4 Exercise 3-1 and 4-1

Accessing and Modifying Mule Events

  • describe the Mule event data structure
  • use transformers to set event payloads, attributes, and variables
  • write DataWeave expressions to access and modify event payloads, attributes, and variables
  • enrich Mule events using target parameters
  • DEV:FUN4 Module 6
  • DEV:DIY4 Exercise 6-1, 7-1, and 7-2
  • enriching Data with Target Parameters

Structuring Mule Applications

  • parameterise an application using property placeholders
  • define and reuse global configurations in an application
  • break an application into multiple flows using private flows, subflows, and the Flow Reference component
  • specify what data (payload, attributes, variables) is persisted between flows when a Flow Reference is used
  • specify what data (payload, attributes, variables) is persisted between flows when a Mule event crosses a connection boundary
  • specify what data (payload, attributes, variables) exists in a flow before and after a call in the middle of a flow to an external resource
  • DEV:FUN4 Module 7
  • DEV:DIY4 Exercise 7-1 and 7-2

Building API Implementation Interfaces

  • manually create a RESTful interface for a Mule application
  • generate a REST Connector from a RAML specification
  • describe the features and benefits of APIkit
  • use APIkit to create implementation flows from a RAML file
  • describe how requests are routed through flows generated by APIkit
  • DEV:FUN4 Module 4
  • DEV:FUN4 Module 8
  • DEV:DIY4 Exercise 4-1

Routing Events

  • use the Choice router to route events based on conditional logic
  • use the Scatter-Gather router to multicast events
  • validate data using the Validation module
  • DEV:FUN4 Module 9
  • DEV:DIY4 Exercise 9-1

Handling Errors

  • describe the default error handling in a Mule application
  • define a custom global default error handler for an application and identify in what situations it will be used
  • compare and contrast how the On Error Continue and On Error Propagate scopes work
  • create one or more error handlers for a flow
  • use the Try scope to specify error handlers for one or more event processors
  • describe the data structure of the Mule Error object
  • map errors to custom application errors
  • DEV:FUN4 Module 10
  • DEV:DIY4 Exercise 10-1

Transforming Data with DataWeave

  • write DataWeave scripts to convert JSON, XML, and Java data structures to different data structures and data types
  • use DataWeave functions
  • define and use DataWeave variables, functions, and modules
  • define and use custom data types
  • apply correct DataWeave syntax to coerce data types
  • apply correct DataWeave syntax to format strings, numbers, and dates
  • call Mule flows from a DataWeave script
  • DEV:FUN4 Module 11
  • DEV:DIY4 Exercise 11-1

Using Connectors

  • retrieve data from a Database using the Database connector
  • create parameterized SQL queries for the Database connector
  • retrieve data from a REST service using the HTTP Request operation or a REST Connector
  • use a Web Service Consumer connector to consume a SOAP web service
  • use the Transform Message component to pass arguments to a SOAP web service
  • list, read, and write local files using the File connector
  • list, read, and write remote files using the FTP connector
  • use the JMS connector to publish and listen for JMS messages
  • DEV:FUN4 Module 4
  • DEV:FUN4 Module 8
  • DEV:FUN4 Module 12
  • DEV:DIY4 Exercise 4-1, 8-1, 12-1, and 12-2

Processing Records

  • list and compare and contrast the methods for processing individual records in a collection
  • explain how Mule events are processed by the For Each scope
  • use the For Each scope to process records
  • explain how Mule events are processed by the Batch Job scope
  • use a Batch Job with Batch Steps and a Batch Aggregator to process records
  • use the Scheduler component to trigger a flow
  • use connector listeners to trigger flows
  • describe the features, benefits, and process to use automatic watermarking vs. manual watermarking
  • use connectors with automatic watermarking capabilities
  • persist data between flow executions using the Object Store
  • DEV:FUN4 Module 12
  • DEV:FUN4 Module 13
  • DEV:DIY4 Exercise 13-1

Debugging and Troubleshooting Mule Applications

  • use breakpoints to inspect a Mule event during runtime
  • install missing Maven dependencies
  • read and decipher Mule log error messages
  • DEV:FUN4 Module 6
  • DEV:FUN4 all WTs
  • DEV:DIY4 Exercise 6-1 and Walkthrough
  • DEV:DIY4 all exercises

Deploying and Managing APIs and Integrations

  • package Mule applications for deployment
  • deploy applications to CloudHub
  • use CloudHub properties to ensure deployment success
  • create and deploy API proxies
  • connect an API implementation to API Manager using autodiscovery
  • use policies, including client ID enforcement, to secure an API
  • create SLA tiers and apply SLA based policies
  • DEV:FUN4 Module 5
  • DEV:DIY4 Exercise 5-1 and 5-2
  • configuring API Autodiscovery in a Mule 4 Application

About Influential Software

The Influential Software team has been delivering quality business software, services, and training for over 25 years. As a certified MuleSoft Partner, we are experts in data integration and the key technologies used in MuleSoft Anypoint Platform.

Our UK teams work on- and off-site for enterprises of all sizes, from FTSE 100/250 companies to SMEs. The result is hundreds of successful projects and long-term client partnerships.

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