[ TOP & MOST ASKED ] Fuse ESB interview questions and Answers

Last updated on 17th Nov 2021, Blog, Interview Questions

In this list of Fuse ESB basic interview questions, we have included all regularly asked basic and Fuse ESB interview questions for experienced candidates with detailed answers to help you clear the job interview. The following list includes the best important Fuse ESB questions for freshers as well as Looker questions and answers for experienced candidates to help them prepare for the interview. This complete guide of Looker interview questions will encourage you to crack your Job interview easily.

1. What Is An Esb? Have You Deployed Camels On Any Esb?

Ans:

ESB stands for Enterprise Service Bus. It may be defined as a tool designed to assist enforce an utility the use of SOA principles Not for all projects is the use of ESB an finest solution ESB should be used while tasks contain integrating some of Endpoints like Web services, JMS, FTP and many others. Have deployed JBoss Fuse ESB for Apache Camel Deployment.

2. What Is Apache Camel?

Ans:

In a corporation, some systems of various kinds exist. Some of those can be legacy structures at the same time as a few can be new. These structures often have interaction with each other, and need to be incorporated. This interaction or integration isn’t always easy as the implementations of the structures, their message formats can also differ. One way to gain that is to put into effect code which bridges those differences. However this can be factor to factor integration. If the next day once more if there’s exchange in a machine the alternative might also have to be modified this isn’t proper.

3. What exactly do you mean by the term integration? How can it be implemented in business?

Ans:

Well, integration is nothing but attracting two different devices, applications, machines, tools, or anything with each other for achieving a specific result or to accomplish a specific task. It has become vital for businesses because it helps them perform their tasks reliably and quickly and in fact, without investing a lot of money. A lot of business in the present scenario is adopting this technology to keep up the pace.

4. Can the task of a business depend on a single app? What if they are present at specific locations?

Ans:

These days’ businesses are becoming more and more complex to understand and to maintain. It is not possible for any organization to maintain everything with a single application. Of course, there is always a need for a lot. Many times their applications are not present exactly where they want but it remains present in another branch office. During such a situation, the FuseESB approach can be considered as it offers very reliable results to get the most desired results in this matter.

5.What is application integration? What is its significance?

Ans:

Application integration means accessing a specific application from multiple locations when it is present at a defined location only. In other words, application integration means joining or fixing different applications of a business with each other so that they can be accessed anytime anywhere by the authorized users. It saves costs and ensures faster operations. A lot of businesses have started considering this approach due to the diverse array of benefits that they can have.

6. What exactly is digital transformation according to you?

Ans:

Digital transmission is a process of sharing information digitally. Any information or data is generally present in its specific format which cannot be integrated or shared as it is. It needs to be converted into digital form so that application and software integration could be achieved. This is achieved generally with the help of digital transformation. Successful digital transformation needs expertise, as well as skills.

7. Explain Apache CXF and active MQ

Ans:

Apache CXF	Apache active MQ
Red Hat JBoss Fuse’s embedded Web and RESTful services framework is based on Apache CXF, and provides a small footprint engine for creating reusable web services along with service-enabling new and legacy applications as part of an integration solution.	Red Hat JBoss Fuse’s embedded messaging service is based on Apache ActiveMQ. It supports the standard JMS 1.1 features and provides a wide range of extended JMS features for building robust and reliable messaging applications.
Red Hat JBoss Fuse supports a variety of standards and protocols for creating web services, such as SOAP and WSDL among others, and allows for Contract-first or Code-first development with JAX-WS.	Red Hat JBoss Fuse consists of both a messaging broker and client-side libraries that enable remote communication among distributed client applications. Red Hat JBoss Fuse supports Point-to-Point and Publish/Subscribe messaging along with both persistent and nonpersistent messages.
In addition, Red Hat JBoss Fuse provides a standard way to build RESTful services in Java with JAX-RS.	In addition, ActiveMQ can be scaled both vertically and horizontally to allow for processing of a large volume of messages for a large number of concurrently connected clients.

8. What exactly do you know about the FuseESB approach? How is it different?

Ans:

It is owned by Red Hat corporations and is basically a flexible, as well as a lightweight integration platform that businesses can consider for quick integration. It has modular integration abilities and this is exactly what makes it best in every aspect. Any form of information from different apps can easily be uncloaked when it comes to integration.

9. What should be the features of an integration application according to you?

Ans:

Depending on the need and other similar factors, any integration application has features that let it perform its task simply. A few of them are listed below.

• It should be compatible irrespective of the technology on which the other apps need to be integrated as based.
• It must enable organizations to monitor and control all the apps centrally.
• The bandwidth requirement must match the organization’s standards.
• It must be free from any form of bugs.
• The integration application should be reliable, have precision, as well accuracy.
• It must give users access to integrate a large number of apps with each other.
• The downtime should below.

10. Deliver an introduction to fuse ESB?

Ans:

11. Why it is necessary for businesses to connect all the information sources in the present scenario?

Ans:

Currently, there are specific tasks that every team has to perform in order to run a business smoothly. There is nothing wrong with saying that these tasks and processes are largely dependent on each other. A user must have all the information available to achieve a specific result. Therefore connecting the entire information source is mandatory in any business.

12. What is the Software-as-a-service approach?

Ans:

It is basically the licensing and delivery model of software which is available online and users can access them based on a subscription. Software or applications in this category are centrally hosted and there is a need to have a web browser to access the same.

13. What do you mean by the term ESB? What is its significance in data or information integration?

Ans:

ESB stands for Enterprise Service Bus. This approach is useful when it comes to implementing a channel between the software applications that can easily be interacted with. It can be in any form. Sometimes there is a need to have additional tools and applications to implement this approach. If the applications are simple, they can be connected through a simple channel. However, this method has a limit and thus other approaches such as FuseESB are considered.

14. What are the ESB tools?

Ans:

• Red Hat JBoss Fuse. JBoss Fuse is more than an enterprise service bus (ESB).
• Mule ESB. Mule ESB is a low footprint Java-based enterprise service bus.
• IBM Websphere ESB. IBM WebSphere ESB is IBM’s enterprise service bus offering.
• Oracle ESB.
• Microsoft BizTalk.

15. During the integration of applications or data, what if they have different formats that are not supported by the other applications with which they need to be integrated?

Ans:

This problem is common but it has a solution. The first thing a common or a standard format can be considered and all the data needs to be converted into that. It cannot be done manually as it consumes a lot of time and effort. Generally, the integration application which is considered has this ability with it. It converts all the data or information into digital formats that are generally in the form of 0’s and 1’s.

16. Give three major reasons for application integration in a business?

Ans:

• Time and cost-saving up to a great extent.
• While performing a specific task, users can ensure the availability of all the information and in fact, technology which assures better outcomes.
• Reliability, efficiency, as well as enhanced productivity at the same time can be assured.

17. What is an API?

Ans:

It stands for Application Programming Interface and is basically a set of protocols and important definitions for developing specific software. It plays a significant role in the development of integration and other applications. It can also be considered as detailed information that clearly states the methods and strategies on which different software components communicate with each other. It generally includes specifications for variables, routines, remote calls, object classes, templates, data structure, and so on.

18. What are the factors that you should pay attention to before considering data or application integration?

Ans:

The data should be of superior quality and is free from any form of bugs. This is necessary because later it can interrupt the functionality of apps and can even lead to providing false information which means losses. Testing the integration apps is also necessary to get the expected outcomes.

19. How many connectors are present in the FuseESB?

Ans:

FuseESB contains 150 connectors that are included in the package.

20. Describe the look inside FUSE ESB4 ?

Ans:

21.Give three advantages of using data or information integration applications?

Ans:

There are certain advantages of using such an application. The best ones are:

• The data or apps can be integrated with each other irrespective of their location on a network.
• It always makes sure of multi-functionality and availability of options for performing a specific task.
• Apps can be centrally monitored and controlled.

22. What type of integration is considered by the businesses for their applications? Temporary or permanent?

Ans:

It depends on the needs actually. It is not always necessary that all the apps are to be integrated with each other all the time. Due to factors such as security and confidentiality of the information, some apps need to be run differently. However, apps with similar categories and in fact, those engaged in a similar operation can be integrated permanently.

23. How can you define enterprise application integration?

Ans:

Well, it is basically a framework that generally comprises an array of services and technologies that aims to enable the process of integration of applications and systems within an enterprise. The aim is to load the data of one application with another.

24. What is the difference between the blueprint and a spring dependency injection framework in Jboss fuse

Ans:

Blue print	Spring dependency
The blueprint can resolve this dependency automatically on the run time.	Packaging the project as the OSGi bundle is done, the Spring dependency expects the developer to add some new dependencies that are explicitly maven-bundle-plugin configuration.

25. Can application integration be compared with automation, if so. How?

Ans:

Both application integration and automation are different approaches although they seem similar. In automation, the processes are controlled and governed without a human interface which is not the case in application integration. All the sub-processes are monitored and controlled by the users in application integration. One similarity between both these approaches is they make the different applications communicate with each other but they are totally different.

26.What type of business can consider application integration?

Ans:

Almost every type of business are adopting it but the ones which are at the top are:

• ERP systems developers
• Business intelligence application
• Supply chain management
• CRM application developers
• Human resource systems

27. What could be the consequences of lack of communication among the apps or the systems?

Ans:

It can affect production, efficiency, quality, as well as collaboration up to a large extent. Much of the straightforward process can become extremely daunting. In addition to this, it can largely affect the ability of resources and an organization has to bear losses. Slow performance in every process leads to large-scale losses.

28. Can Application integration lead to automation in a business?

Ans:

Yes, up to some extent it can contribute to this matter. However, alone application integration can only promote automation but couldn’t lead to the same. The business must pay special attention to keep up the pace if all they want is automation.

29.What are the common problems that users have to face when it comes to data or application integration?

Ans:

Generally, this is an error-free approach. However, the problems can declare their presence when the users make sweeping changes in the application data, modify data structure or perform other similar actions. Applications must be linked based on their specifications and similarity.

30. What is fuse overview?

Ans:

31.Can application integrations have any drawbacks associated with them, Is it possible to eliminate them?

Ans:

Application integration is a vast approach. It doesn’t just mean connecting the different applications with each other but its motive is to enhance efficiency in the business. The major drawback associated is a data leak. However, this can be avoided up to a great extent. Direct access must not be given to all the apps for other apps until they make a request for the same. Of course, it can avoid a lot of issues related to the same problem.

32. Name any two integration patterns that are common in application integration?

Ans:

• Meditation, also known as intra-communication
• Federation, also known as inter-communication

33. What exactly do you know about an integration module?

Ans:

There are chances that an EAI system is engaged in more than two integration operations at the same time. Every integration process is controlled by an integration module.

34. How can you delete session logs on the IS?

Ans:

These can be deleted by opening the installation folder and clicking the integration server file and then logs. All the files remain present in them with .log format. From there, any file can directly be deleted.

35. Give abbreviation for UDAI?

Ans:

It stands for Uniform Data Access Integration. It is a good option to consider when all the applications that need to be integrated are thoroughly uniform.

36. In application integration, how will you measure the progress?

Ans:

It can simply be measured through generic data models, through an MDM product, by identifying the core data sources in the applications, or by building an enterprise data platform. However, building the same may consume extra time. Thus, other approaches are good.

37. What are the differences between Blueprint XML and Camel Spring and configuration?

Ans:

Blueprint XML	Camel spring
Blueprint is one of the frameworks that are defined by the OSGI Alliance.	Spring DM framework is defined by the Spring Source.
Default Configuration Location is the same as JBoss.	Camel Spring has the default Configuration of location that is META-INF/spring.
The Custom Locations Header(CLH) of the Blueprint XML is Context	The Custom Locations Header (CLH) of Camel Spring is Bundle-Blueprint.

38. Name the factors that need to be addressed before the application data integration?

Ans:

• Spectral resolution of the data
• Formats
• retrieval mechanisms
• Storage mechanisms.

39. What Is Osgi?

Ans:

OSGi stands for Open Source Gateway initiative.

It provides the benefits:

• A transportable and relaxed execution environment primarily based on Java.
• A carrier control device, which may be used to sign in and proportion offerings throughout bundles and decouple carrier vendors from carrier customers.
• A dynamic module device, which may be used to dynamically deploy and uninstall Java modules, which OSGi calls bundles.
• A light-weight and scalable solution.

40. What is JBOSS Enterprise application?

Ans:

41. How Is Osgi Implemented For Jboss Fuse?

Ans:

The JBoss Fuse wraps around the OSGi container implementation. It supports deploying OSGi container as a runtime server.

42. How Is The Application Deployed As Bundles?

Ans:

Deployment is the mechanism through which applications, modules, updates, and patches are delivered from developers to users. The methods used by developers to build, test and deploy new code will impact how fast a product can respond to changes in customer preferences or requirements and the quality of each change.

43.What Is Fabric?

Ans:

Fuse Fabric is an open-supply integration platform for deep management of Java Containers (JVMs). It is a supported factor of the JBoss Fuse Platform. Fuse Fabric makes it without a doubt clean to provision, automate, configure, and control from a crucial region with a constant User Interface and User Experience.

44. What Is a Switchyard?

Ans:

Switchyard is a part-based development framework centered on constructing dependent, maintainable services and applications and the usage of the concepts and first-rate practices of SOA. It works with Apache Camel to offer a quick, simple, flexible integration runtime with complete connectivity and transports.

45. What is the full form of OSGi?

Ans:

Open Source Gateway initiative

46.What is ESB?

Ans:

An ESB is a standards-based integration platform that combines messaging, web services, data transformation, and intelligent routing to reliably connect and coordinate the interaction of significant numbers of diverse applications across extended enterprises with transactional integrity.

47.Name the different containers that Jboss Fuse supports?

Ans:

Apache Karaf

JBoss Enterprise Application Platform

48.Explain Apache Camel?

Ans:

Red Hat JBoss Fuse utilizes Apache Camel for building integration and routing solutions using Enterprise Integration Patterns (EIPs). Each route defines an integration path between endpoints, where a system can either send or receive messages, and while data is in these routes it may be transformed, validated, intercepted, and so on. Routes may change endpoints dynamically, either as additional bundles are activated, based on the content of the message, or through additional methods. With over 140 defined endpoints Red Hat JBoss Fuse allows for integration with a variety of services immediately upon deployment

49. Name the different components of JBoss Fuse?

Ans:

• Apache Camel
• Apache CXF
• Apache ActiveMQ
• Fabric8
• Switchyard

50. What is Deploying ActiveMQ with Red Hat Fuse in a Kubernetes Cluster?

Ans:

51. Explain Apache CXF?

Ans:

Red Hat JBoss Fuse’s embedded Web and RESTful services framework is based on Apache CXF, and provides a small footprint engine for creating reusable web services along with service-enabling new and legacy applications as part of an integration solution. Red Hat JBoss Fuse supports a variety of standards and protocols for creating web services, such as SOAP and WSDL among others, and allows for Contract-first or Code-first development with JAX-WS. In addition, Red Hat JBoss Fuse provides a standard way to build RESTful services in Java with JAX-RS.

52. Explain Apache ActiveMQ?

Ans:

Red Hat JBoss Fuse’s embedded messaging service is based on Apache ActiveMQ. It supports the standard JMS 1.1 features and provides a wide range of extended JMS features for building robust and reliable messaging applications. Red Hat JBoss Fuse consists of both a messaging broker and client-side libraries that enable remote communication among distributed client applications. Red Hat JBoss Fuse supports Point-to-Point and Publish/Subscribe messaging along with both persistent and nonpersistent messages; in addition, ActiveMQ can be scaled both vertically and horizontally to allow for processing of a large volume of messages for a large number of concurrently connected clients.

53. What is Spring DM framework is defined by the Spring Source?

Ans:

Blueprint is one of the frameworks that is defined by the OSGi Alliance.	Spring DM framework is defined by the Spring Source.
Default Configuration Location is the same as JBoss.	Camel Spring has the default Configuration of location that is META-INF/spring.

54. Explain Fabric8?

Ans:

Fuse Fabric is a technology layer that allows a group of containers to form a cluster that shares a common set of configuration information and a common set of repositories from which to access runtime artifacts. This allows one to run several containers either on your own hardware or in the open hybrid cloud and allows for configuration management, service discovery failover, load balancing, centralized monitoring among other benefits.

55. Explain Switchyard?

Ans:

Switchyard is a lightweight service delivery framework providing full life-cycle support for developing, deploying, and managing service-oriented applications. It allows you to deploy and run services with limited dependencies and consists of components such as composite services and composite references.

56. Explain Apache Karaf?

Ans:

Red Hat JBoss Fuse is based on Apache Karaf, a powerful, lightweight, OSGi-based runtime container for deploying and managing bundles to facilitate componentization of Red Hat JBoss Fuse applications. Red Hat JBoss Fuse also provides native OS integration and can be integrated into the operating system as a service so that the lifecycle is bound to the operating system. Furthermore, Red Hat JBoss Fuse extends the OSGi layers with an extensible console for managing applications and administering instances, a unified logging subsystem supported by Log4J, both manual and hot deployment of OSGi bundles, and multiple mechanisms for installing applications and libraries among others.

57. Explain JBOSS EAP?

Ans:

Red Hat JBoss EAP 6 is a JEE certified container that leverages a flexible, modular architecture, and it integrates EJB components, web services, security, and clustering. By utilizing a JEE container you have full access to JEE components such as persistence and the injection framework.

58. What is ESB in JBoss fuse?

Ans:

Enterprise Service Bus is the full form of ESB. It is often outlined as a medium intended to assist, implement and associate an application on the SOA principles but the usage is not up to the mark for all. The use of ESB associate degree optimum resolution ought to be done when there is an integration required for a variety of Endpoints such as Webservices, FTP, JMS, etc.

59. Why is ESB used?

Ans:

Following are the few points that justify why Enterprise Service Bus is important:

• ESB plans to adjust the matter in combination with various compatible applications.
• It goes about as a Middleware, that is a moderator of the majority of your applications and encourages message steering between them.
• Instead of every application interfacing with every other alternative application directly, it simply has an individual interface to the ESB.
• The ESB is known for making an interpretation of messages to/from a standard arrangement and directing them to their goals.
• The significant sparing amid this methodology comes as a shelter in the event that you must trade any of your current applications. As opposed to composing a full cluster of late interfaces, you right now exclusively have only one interface, i.e, between your application and in this manner the ESB.

60. Developing and deploying an application red hat?

Ans:

61. What do you comprehend from SOA and ESB

Ans:

SOA and ESB are regularly utilized as compatible with each other. Yet they are totally unique. SOA is a structural design which enables the application to uncover its functionalities as an administration over the system by means of correspondence conventions. Whereas ESB is a model which encourages correspondence between different frameworks, yet ESB can be utilized as a spine while actualizing SOA.

62. After you unzip Fuse, what will you find in the directories inside the extracted Directory in JBoss Fuse?

Ans:

We find the following in the directories:

• bin
• etc
• deploy
• lib
• licenses
• extras
• Quickstarts

63. What is a Splitter in JBoss Fuse?

Ans:

A splitter is a pattern used to split the whole input data of smaller size.

64. What is Apache Camel in JBoss?

Ans:

Apache Camel is one of the versatile open-source integration frameworks that is basically known for the Enterprise Integration Patterns. The Camel software will empower to define the mediation and routing rules in lots of domain-specific languages that includes Java-based Fluent, Spring or Blueprint XML Configuration files, API and a Scala DSL.

65. What is the difference between a blueprint and a Spring dependency injection framework in JBoss Fuse?

Ans:

When any new dependencies get into and are introduced in any of the blueprints through the XML schema namespaces, then the blueprint can resolve this dependency automatically on the run time. In contrast, when packaging the project as the OSGi bundle is done, the Spring dependency expects the developer to add some new dependencies that are explicitly maven-bundle-plugin configuration.

66. What does OSGi stand for and explain some of its features?

Ans:

An OSGi means ‘Open Source Gateway activity.’ It gives these advantages in JBoss Fuse :

• The compact and secure execution condition depends on the Java content.
• It gives an administration the executive framework that can be utilized in enrolling and sharing administrations crosswise over groups and decouple specialist organizations of the service providers.
• The OSGi additionally gives a dynamic module framework that can be utilized in progressively introducing and uninstalling Java modules, known as a pack by OSGi.
• It is additionally a light-weight and gives the best adaptable arrangement.

67. How can OSGi be executed with JBoss Fuse?

Ans:

OSGi can be executed with JBoss Fuse by sending the application as groups.

68.Write the difference between Fuse and Circuit Breakers.

Ans:

Fuse	Circuit Breaker
Fuse can only be used once	A circuit breaker can be used many numbers of times

69. How can the application be deployed as the Bundles?

Ans:

One can deploy an application as the Bundles using the Apache Felix Plugin.

70. What is christina?

Ans:

71. What is a Fabric in JBoss fuse applications?

Ans:

In JBoss fuse, a Fuse Fabric is known to be the open-source mix stage that is utilized for profound administration in Java Containers (JVMs). It can assist the component of the JBoss Fuse Platform. Wire Fabric additionally makes it simple to computerize, arrange, design and oversee from any central area with just a predictable user-experience and user-interface.

72. JBOSS EAP, what do you know about that?

Ans:

In JBoss Fuse, JBoss EAP is a JEE certified container that has leverages and can be flexible, modular architecture, and could also be integrated with EJB components, security, web services, and clustering. By utilizing the JEE container, one has full access to JEE components like the persistence and the injection framework.

73. What do you like to say about a Switchyard?

Ans:

SwitchYard is a part based improvement system that is engaged to construct organized, viable administrations and applications that utilize the ideas and can be best polished in SOA. Switchyard and Apache Camel work together in furnishing it with a quick, straightforward, adaptable reconciliation runtime with great justifiable availability and transport.

74. Say a few words about Apache Karaf?

Ans:

The Apache Karaf is an OSGi based runtime, Apache Karaf is the place the Application group runs. JBoss Fuse utilizes Apache Karaf as its runtime where the groups run and work together to give the best business usefulness.

75. What do you like to say about Apache ActiveMQ?

Ans:

Based on Apache ActiveMQ, the JBoss Fuse uses its embedded messaging service. Apache ActiveMQ supports the standard JMS 1.1 features and helps in providing a wide range of extended JMS features. Using these, robust and reliable messaging applications are built. Red Hat JBoss Fuse consists of both the messaging broker and a client-side library that helps in enabling remote communication among which the client applications are distributed. JBoss Fuse also supports Point-to-Point and Publish/Subscribe messaging along with both the persistent and nonpersistent messages.

76. Explain what Apache CXF is?

Ans:

Apache CXF is a Red Hat JBoss Fuse that has installed Web and RESTful administrations in it. This depends on Apache CXF and gives a little impression motor to make reusable web benefits alongside the administration empowering new and inheritance applications as a section in the incorporation arrangement. A Red Hat JBoss Fuse can assist an assortment of norms and conventions to make a web administration, similar to WSDL and SOAP among others. At that point, this permits the Code-first or Contract-first improvement with JAX-WS. Over this, Red Hat JBoss Fuse gives the best standard method for building the RESTful administrations in Java with JAX-RS.

77. Have you ever exposed a web service endpoint using the apache camel and could it be deployed on JBoss Fuse?

Ans:

Yes. Using Apache CXF, we can expose a web service. For doing so, one needs to use Contract first and then needs to approach to generate the classes from WSDL.

The pattern is like this:

Apache Camel + Apache CXF SOAP Web Services

78. Have you at any point uncovered a REST web administration endpoint by the utilization of Apache Camel?

Ans:

Yes. Utilizing Apache CXF, one has the odds of uncovering a REST Endpoint. This is feasible for utilizing either JAX-RS or CXFRS.

79. What is an ESB? Have you deployed a camel on any ESB?

Ans:

ESB stands for Enterprise Service Bus. It can be defined as a tool designed to help implement an application using SOA principles Not for all projects projects is the use of ESB an optimum solution ESB should be used when projects involve integrating a number of Endpoints like Web Services, JMS, FTP etc. Have deployed JBoss Fuse ESB for Apache Camel Deployment.

80. Define an enterprise service bus?

Ans:

81. What is Fuse API?

Ans:

API Fuse is an embedded iPaaS solution purpose built for native integration. Request A Demo. Watch Video. Your marketplaceYour native integration slack.

82.What is fuse mount?

Ans:

FUSE (Filesystem in Userspace) is a simple interface for userspace programs to export a virtual filesystem to the Linux kernel. FUSE also aims to provide a secure method for non privileged users to create and mount their own file system implementations.

83. Is Red Hat fuse an ESB?

Ans:

Red Hat JBoss Fuse is an open source Enterprise Service Bus (ESB) that focuses on mediating, transforming, and routing data across multiple applications, services, or devices for both internal systems and external services.

84. What is ESB architecture?

Ans:

An Enterprise Service Bus (ESB) is fundamentally an architecture. It is a set of rules and principles for integrating numerous applications together over a bus-like infrastructure. This decouples systems from each other, allowing them to communicate without dependency on or knowledge of other systems on the bus.

85. Are ESB still relevant?

Ans:

Thus, the concept of an ESB as an architectural pattern is certainly not dead. Instead, it has been resurrected with new names and counterparts. In fact, it is more relevant than ever before and part of the future hybrid integration architecture.

86. What is the difference between ESB and API?

Ans:

Enterprise Service Bus (ESB)	API
Enterprise Service Bus (ESB) is a legacy technology for connecting your digital services.	An API gateway is a proxy layer for your digital services which manages a variety of features via APIs.

87. Is ESB an API?

Ans:

API management is more flexible and optimized for newer tech developments such as microservices, whereas ESBs are not. API management solutions are typically consumption-based, while ESBs have an exposure-based model.

88. What is an enterprise API?

Ans:

An enterprise API is an API used to connect enterprise applications and backend resources. In the enterprise, APIs are critical as businesses adopt new technologies and applications.

89. What does API stand for?

Ans:

application programming interface API stands for application programming interface, which is a set of definitions and protocols for building and integrating application software

90. Define Microservice migration story with JBoss BPM travel agency?

Ans:

91. What is your API key?

Ans:

The API key is a unique identifier that authenticates requests associated with your project for usage and billing purposes. You must have at least one API key associated with your project.

92. How do I fix an API error?

Ans:

To fix the API call for those two situations, make sure that the credentials you are using have the access-level required by the endpoint, or that the access token has the correct permissions. A less common reason we might see this error is if we’re not explicit about the Accept header value.

93. What is Mulesoft ESB?

Ans:

Mule, the runtime engine of Anypoint Platform, is a lightweight Java-based enterprise service bus (ESB) and integration platform that allows developers to connect applications together quickly and easily, enabling them to exchange data.

94. How many connectors are offered by the Fuse ESB?

Ans:

JBoss Fuse provides more than 150 connectors that are ready to use. It supports integration for the extended enterprise, including applications and services on-premise, or in the cloud, or on mobile devices.

95. What is the importance of Apache ActiveMQ in JBoss Fuse?

Ans:

Apache ActiveMQ is Red Hat JBoss Fuse’s embedded messaging service. It contains a messaging broker and client-side libraries to enable remote communication. It supports JMS features to build robust and reliable messaging applications. It sends messages to a JMS Queue or Topic and consumes messages from a JMS Queue or Topic. We can scale ActiveMQ vertically or horizontally to handle a large volume of messages processing.