Introduction
Mulesoft provides application software for connecting data and devices. Mulesoft reduces the complexity of dealing with multiple systems. The numerous tools in Mulesoft's platform help the developers to manage and test APIs. With this technology growing very well in the IT industry, it becomes crucial to have some important Mulesoft questions handy to prepare beforehand for your Mulesoft interviews. In this blog, we will discuss some important Mulesoft interview questions.
Mulesoft Interview Questions for Freshers
The questions in this section would build your foundational knowledge of Mulesoft. It is critical to go through these questions as they cover the basics of the topic.
1. Explain Mulesoft.
Ans: Mulesoft provides an open-source platform to reduce the complexity of handling multiple systems while developing applications. It is a java-based ESB framework used to connect data and devices. It helps engineers with issues like Error handling, data structure, design, Monitoring, etc., while making their work more efficient and scalable. Mulesoft is also used to connect Saas software to the cloud.
2. Mention the types of variables in Mule.
Ans: Mule offers three different types of variables to its developers:
1. Record variables: These are the particular type of Mulesoft variables that come into application within batch processing flows.
Syntax:
#[recordVars.Code]
2. Session variables: Session variables are used to set or delete variables combined with a piece of specific information throughout the entire process.
Syntax:
#[sessionVars.Code]
3. Flow variables: These variables are used to store messages within the current flow.
Syntax:
#[flowVars.Code]
3. Explain the types of messages used in Mulesoft?
Ans: The different types of messages used in Mulesoft are:
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Bridge messages: Messages that are directed from inbound to outbound routers are called Bridge messages
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Build messages: Messages that are generated from dynamic/fixed values are called build messages
- Echo and log messages: These messages are to log data and advance them from inbound to outbound routers.
4. Mention some features of Mule ESB.
Ans: Mule ESB or Mule Enterprise Service Bus reduces the complexity of developers connecting and interchange data. To put it in simpler words, it is easier to interact with applications running on different VMs.
Features of Mule ESB include:
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Message Routing Service
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Web Service Security
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Graph design with a simple drag-and-drop feature
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Message transformation feature
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Collection of service containers
- Centralized Monitoring, etc
5. Define shared resources in Mule.
Ans: It is the feature by which multiple developers from different teams can work on the same application parallelly. Thus the shared resource is open to numerous software applications deployed under the same domain. Shared resources make it easier to support various clients and service lines simultaneously.
6. What do you understand by Mule expression language?
Ans: Mule Expression Language or MEL is a Mule language used to retrieve and check data in the payload. It is also used to access properties and attributes of a message in Mule.
7. What are the different types of endpoints in Mule ESB?
Ans: Endpoints are triggers that initiate the processing in the workflow of Mule. Following are the different endpoints in Mule ESB are:
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IMAP: Internet Messaging Access Protocol
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SMTP: Simple Mail Transfer Protocol
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JMS: Java Message Service
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AJAX: Asynchronous Javascript and XML
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HTTP: Hypertext Transfer Protocol
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VM: Virtual Machine
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JDBC: Java Database Connectivity
- FTP: File Transfer Protocol
9. What is SDO?
Ans: The full form of SDO is Service Data Object. It refers to the objects in Mulesoft. SDO acts as an abstraction layer hiding the protocols and transports, thus reducing the complexity for the user.
10. Mention the advantages of using an ESB.
Ans: The advantages of using an ESB are:
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With the help of Saas-based applications, ESB offers numerous connectivity options.
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ESB grants services for the management of API and analytics.
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ESB comes with the feature of automated bug fixing and testing services.
- ESP is a faster and more flexible approach to batch integration with the help of real-time integration property.
11. Define listener in Mulesoft.
Ans. In Mulesoft, a listener is referred to as an inbound connector that is used for listening to incoming messages. It can be described as a configuration element that states the protocol, port, and other settings for receiving messages from an external system. After the listener receives the message, it is then transmitted to the next component in the mule flow for processing.
12. What do you mean by environment variables?
Ans. Environment variables are used to keep the configurations and credentials secure and flexible in Mulesoft. They can be used in Mulesoft with syntax ${env:}. In the Mulesoft environment, variables can be defined using the YAML file or the Anypoint Runtime Manager.
13. Explain error handling in Mulesoft.
Ans. Mulesoft provides numerous ways to manage errors while executing mule applications. With the error handling feature in Mulesoft, a robust and reliable application can be developed.
Click on the following link to read further: Javascript Interview Questions and Answers
14. Name the different primitives used in Mediation.
Ans: Mediation customizes the communication between the application software and service elements. The different types of primitives used in Mediation are:
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Type Filter
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Service Invoke
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Fan-in
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Fan-out
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Message Filter
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XSLT
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BO Map
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Even emitter
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Stop
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Message element setter
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Fail
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Sub Flow
- Headers, Setters, etc
15. What is meant by fan-in and fan-out?
Ans: Fan-in refers to the number of inputs managed by any logic gate. For example, if an AND gate has four inputs, the fan-in would be 4.
Fan-out is a primitive mediation that denotes the process where a service router sends messages parallel to numerous consumers.
Fan-in and Fan-out are always used together.
16. Briefly explain scatter-gather.
Ans. In Mulesoft, the Scatter-gather component is a powerful message-processing router that permits a mule flow to send a single message to numerous endpoints, collecting the responses simultaneously. It works by dividing the message into numerous copies. Thus the complexity of message processing is reduced, thereby increasing the performance of mule flows.
17. Briefly explain Mule Runtime.
Ans: Mule Runtime is basically a runtime engine like an application server for hosting and running mule software applications. Mule runtime can be configured in the cloud. Mule runtime engine offers a single runtime feature, deployment flexibility, and adaptable architecture.
18. Name the different exception handling in Mulesoft.
Ans: The different types of exception handling in Mulesoft are:
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Global Exception Handling
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Catch Exception Handling
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Default Exception Handling
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Choice Exception Handling
- Rollback Exception Handling
19. What do you understand by a worker in Mulesoft?
Ans: Workers in Mulesoft refer to committed instances that are configured on AWS to run integration software applications. Workers in Mulesoft have certain properties associated with them. They are:
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Isolation: Workers must run on different containers
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Capacity: Capacity is necessary for data processing
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Locality: All workers in Mulesoft should be hosted on the cloud
- Manageability: Each worker should be deployed and managed separately
20. Enlist some features of API in Mulesoft.
Ans: The features of API are:
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API complies with HTTP standards
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APIs are more secure
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Sharing data is easier
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APIs improve customer experience
- There is a software development life process associated with every API.