Mule 4 Certification Questions

Introduction To Mulesoft Interview Questions And Answers

1. Mule Certification Exam
2. Mule 4 Certification Questions And Answers

MuleSoft is the most widely used integration platform. Its the Integration Mule ESB and Cloud Hub. It helps in connecting Enterprise and SAAS applications in the cloud and on-premise.

Mule ESB is a Java-based ESB(enterprise service bus). Mulesoft integration platform helps a developer to connect to their application with ESB. It is the lightweight integration framework. ESB is highly scalable that means it helps in connecting the small application with multiple applications but ESB Will not fit for all the projects to implement. If we want to use ESB deep analysis should be done by taking all the parameters into consideration.

This mock exam is good practice test for you to prepare for the Developer Exam for Mule 4. This has questions from various disciplines like Application Networks, API-Led Connectivity, Anypoint Platform, API Management, Mule Events, Structuring Mule Apps, DataWeave, Triggering Flows, etc.

Web development, programming languages, Software testing & others

So if you are looking for a job that is related to Mulesoft, you need to prepare for the MuleSoft Interview questions. Though every interview is different and the scope of a job is also different, we can help you out with the top Mulesoft Interview questions and answers, which will help you to take the leap and get you success in an interview.

Below is the Mulesoft Interview Questions that are mostly asked in an interview. This set of question is divided into two parts which are as follows:

Part 1 – Mulesoft Interview Questions (Basic)

This first part covers basic Mulesoft Interview Questions and answers

1. What is Mulesoft? For what Mulesoft is used for?

Answer:
MuleSoft is the most widely used integration platform. Here we will find 2 types Mule ESB and Cloud Hub for connecting enterprise and SAAS applications in the on-premises and cloud. Mulesoft allows developers to connect applications together quickly and easily and it helps in exchanging the data.

2. Explain the types of variables in mule?

Answer:
There are 3 types of variables available in a mule.

• Flow Variable
• Session Variable
• Record Variable

3. What is Mule ESB?

Answer:
Mule ESB is a Java-based ESB (enterprise service bus) and it is the integration platform all the developers can connect to their respective application directly with ESB. Mule ESB uses service oriented architecture. The main use of Mule ESB is it enables easy integration of existing systems. It can integrate with different technologies that the applications use- It including JMS, Web Services, HTTP, etc.

Let us move to the next Mulesoft Interview Questions.

4. What is ESB?

Answer:
ESB stands for Enterprise Storage bus. It’s software architecture for middleware and it provides fundamental services for more complex architectures. This is the common Mulesoft Interview Questions which is frequently asked in an interview.

Example: In ESB incorporates with the features required to implement an SOA(service-oriented architecture ).

5. What is the MuleSoft Anypoint platform and where it will be used?

Answer:
MuleSoft Anypoint Platform of integration products is designed to tie both software as a service (SaaS) and on-premises software.

Part 2 – Mulesoft Interview Questions (Advanced)

Let us now have a look at the advanced Mulesoft Interview Questions.

6. What are the main Features of Mule ESB? What are the different ESBs in the market?

Answer:

1)The main Features of Mule ESB are::

• It is very simple and easy to use-Drag and drops Graphical design
• SLA monitoring and API management
• High scalability
• We can deploy in a One-click cloud or on-premise deployments

2)Different ESB’s in Market are::

• Talend
• Mule ESB
• JBoss Fuse ESB

7. How will we identify ESB is needed in a project?

Answer:
Implementation of ESB is not suitable for all the projects. We should analyze is really ESB is required here or not. You need to analyze by taking below points into consideration:

• In the project, require 3 or more applications and services to be integrated and there must be a need to communicate between the applications.
• If there is plain of interacting with more applications and Services in the future then we can go with Mule ESB because it is highly scalable.
• We need to keep cost also in mind before going to ESB implementation

Let us move to the next Mulesoft Interview Questions

8. Explain the difference between Callout and Service Invoke?

Answer:
Callout: We can call the service using callout or with service invoke. Use the Callout if we need to mediate a message (without calling an intermediate service) and then call a service provider.

• The Callout provides the simplest model for this configuration.
  Service Invoke: You need to interact with multiple services, and produce an output that combines service responses. The Service Invoke primitive does not switch from request flow to response flow.
• Use the Service invoke if we need to call an intermediate service.
  Example: We can use an intermediate service to adjust a message or to validate a message externally. The mediation flow contains Service Invoke mediation primitive, and a Callout node that is connected to the service provider there will be no intermediate service.

9. What is the full form of SDO and SMO?

Answer:

• SDO: Service Data Object and it represent the Object.
• SMO: Service Message object and it is used to represent messages

10. Explain about Fan-in and Fan-out?

Answer:
Fan-In: Fan-In is always in the flow with Fan-Out and helps in taking a decision to continue flow execution. The Fan In may only be used in combination with Fan Out.

Fan-out: We can use the Fan Out-primitive to fire the output terminal once with the input message or to fire the output terminal multiple times. Fan-out can be used as a combination of Fan Out and Fan In.

Recommended Article

This has been a guide to List Of Mulesoft Interview Questions and Answers so that the candidate can crackdown these Mulesoft Interview Questions easily. Here in this post, we have studied about top Mulesoft Interview Questions which are often asked in interviews. You may also look at the following articles to learn more –

Software Development Course - All in One Bundle

600+ Online Courses

3000+ Hours

Verifiable Certificates

Lifetime Access

Join the DZone community and get the full member experience.

Mule is going to release version 4 soon. Here are some of the important features that will ease development, which will be available in Mule 4:

Message Transformer

In Mule 3, when we use DW and transform messages, we need to explicitly convert the message to a Java object so that the output can be used in Router components, For Each, etc. In Mule 4, you don't need to explicitly convert messages to Java objects. Mule 4 will do it automatically for you.

Simplified Connectors

The File, FTP, JMS, and VM connectors have been updated. The connectors have been made operation based to, for example, create directories/files. Mule 4 has a connector named File-Create Directory, to write files and directories.

Error Handling

Error handling has been modified significantly in Mule 4. In Mule 3, Error handling is Java based, but in Mule 4, Java exceptions are optional. The biggest improvement is that one can catch an exception of some specific block of components (TIBCO has this feature) instead of a centralized exception block. And the exceptions can be re-propagated.

As shown in the diagram below, we can handle the exceptions of some component/s in the same main flow:

Also, exceptions can be chosen from the dropdown list:

Anypoint Studio 7

The Studio has been improved a lot. The following new features have been added to the Studio:

• The palettes have new icons.

• Now one can save their favorite palettes.

• Deeper Maven integration.

  

• One can right click on a palette and go directly to its XML configuration.

• The flows are collapsible.

New Tools

Some new dev tools have been added in Mule 4. One of them is Design Center. It is targeted to the less technical Mule users. Design Center is a web based GUI tool which can facilitate the Mule experience for many users who are less technical or who want to have a quick product review of Mule without the hassle of installing the whole Anypoint Studio in their system.

Management

Connector Updates

Connector updates are no longer bound to the Runtime updates. They are no longer stored inside Runtime- instead, they are distributed outside. It makes it easier to get the connector updates. So, one can update the whole Runtime to get all the updates of the connectors/components, or one can update only the specific connector/component. This gives us a lot of flexibility and can decrease the problems that we might have when updating the whole Runtime.

Mule API

In Mule 3, the APIs are not well defined and scattered. In Mule 4 the APIs will be defined in a structured way.

Self-Tuning

In Mule 3, we have to tune the Runtime, manually defining the Threadpool, etc. But in Mule 4, it will be dynamic and self-tuning so that one can get optimum performance. There will be a centralized global place to tweak the threads instead of tweaking every flow separately.

Driver Reuse

Mule API and SDK

DevKit has been replaced by Mule SDK. Now one can easily extend Mule. It's totally annotation based. It's similar to Devkit with some advanced functionalities. Most importantly, it will not generate any code automatically, contrary to DevKit. It will make the custom code (component/connectors) easily manageable and smaller in size.

New Ways to Extend Mule

Apart from using SDK to extend Mule, now one can package a flow that performs certain actions to be reused in the form of a connector using Anypoint Studio 7.

REST Connect

A new feature called REST Connect has been introduced in Mule 4. It can take any API specification, e.g. RAML or Swagger, and based on the specification, it can generate a Connector. That means that once you publish an API in the Anypoint Exchange 2, it will automatically convert the API to a connector.

Dependency Relationships in the Exchange

In Anypoint Exchange 2, the APIs can have dependencies.

Easy Migration

To migrate from 3.x to Mule 4, it will come with the following tools:

• Application Migration Tool: this tool can migrate Mule 3 application syntax to Mule 4 application syntax.

• Devkit Migration Tool: this tool can migrate Mule 3 connectors to Mule 4 connectors.

Some Important Changes

Here are some of the important changes that will be available in Mule 4:

Message Structure: Message Structure will be changed in Mule 4. Instead of properties, there will be Attributes, as shown below:

Connector Configuration: The output of connectors can be stored directly in variables. Look at the HTTP request connector:

Expression Language: DW language can be used in MEL, also.

Transformation Inside Connector: Basic DW transformation can be done inside Connector. Please look at this diagram:

Conclusion

These are a few of the many changes that will come along with Mule 4. I will try to cover more in my next sections.

Mule Certification Exam

Mule 4 Certification Questions And Answers

Opinions expressed by DZone contributors are their own.