Are you looking for MuleSoft expert interview questions? This list contains 10 of the most frequently asked questions you should be aware of.
MuleSoft’s Anypoint Platform™ is the world’s leading integration platform for SOA, SaaS, and APIs. MuleSoft provides exceptional business agility to companies by connecting applications, data, and devices, both on-premises and in the cloud with an API-led approach. By leveraging the Anypoint Platform, companies can re-architect their SOA infrastructure from legacy systems, proprietary platforms, and custom integration code to create business agility. They can migrate technology infrastructure to the public or private cloud and prioritize the adoption of SaaS applications and other cloud technologies. Source: MuleSoft Official Website
1. What is MuleSoft? What is it used for?
MuleSoft is the most widely used integration platform. Mule ESB and Cloud Hub are used for connecting enterprise and SAAS applications within on-premises and cloud environments. MuleSoft allows developers to connect applications quickly and easily; it also helps in the exchange of data.
2. What are the types of variables in a Mule?
There are 3 types of variables in a Mule:
- Flow variable.
- Session variable.
- Record variable.
3. What is Mule ESB?
Mule ESB is a Java-based ESB (enterprise service bus). It is an integration platform that allows developers to connect their applications directly for the exchange of data. Mule ESB uses service-oriented architecture. The main use of Mule ESB is for the easy integration of existing systems. It can integrate different technologies that applications use: JMS, web services, HTTP, etc.
4. What is ESB?
ESB stands for Enterprise Storage bus. It’s a software architecture for middleware and provides fundamental services for more complex architectures. ESB incorporates the features required to implement an SOA (service-oriented architecture ).
A MuleSoft quiz generally contains one or more questions on ESB.
5. What is the MuleSoft Anypoint platform and where is it used?
MuleSoft Anypoint platform of integration products is designed to tie together software as a service (SaaS) and on-premise software.
6. What are the main features of Mule ESB? What are the different ESBs in the market?
The main features of Mule ESB are:
- It is very simple and easy to use. A drag-and-drop interface allows even novices to operate Mule ESB.
- SLA monitoring and API management.
- High scalability.
- It can be deployed on-cloud or on-premise.
The different ESBs in the market are:
- Mule ESB.
- JBoss Fuse ESB.
7. How do you decide if ESB is required for a project?
An ESB implementation is not suitable for all types of projects. To analyze whether ESB is needed or not, consider the following points:
- Do three or more applications and services need to be integrated? And do the applications need to communicate with each other?
- Will additional applications and services be included later on? Mule ESB is highly scalable and can accommodate such changes.
- Is cost a factor for the project?
8. What is the difference between Callout and Service Invoke?
Callout and service invoke are called to initiate a service. Use callout if you need to mediate a message (without calling an intermediate service) followed by calling a service provider. Callout provides the simplest model for this configuration.
Use service invoke if you need to call an intermediate service. It allows you 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.
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.
9. What is the full form of SDO and SMO?
SDO: Service Data Object. It represents an object.
SMO: Service Message Object. It is used to represent messages
10. Explain Fan-In and Fan-Out.
Fan-In: Fan-In is always in the flow with Fan-Out and helps in deciding whether to continue flow execution or not. Fan-In may only be used in combination with Fan-Out.
Fan-out: 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.
Do go through the official MuleSoft documentation portal while preparing for MuleSoft-based interviews. If you feel there are some important MuleSoft interview questions that candidates need to know about, do comment.