Fuse ESB Interview Questions

Q. Explain Apache CXF
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.

Q. Explain Apache ActiveMQ?
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.

Q. Explain Fabric8?
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.

Q. Explain Switchyard
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.

Q. Explain about OSGi?
Open Services Gateway initiative(OSGi) is used to solve the loading issues that arise in traditional Java EE environments. The JBoss Fuse wraps around the OSGi container implementation. It supports deploying OSGi container as a runtime server.

Q. What are the components of JBoss Fuse?
The following are the components of Jboss Fuse.

  • Apache Camel
  • Apache CXF
  • Apache ActiveMQ
  • Fabric
  • Switchyard

Q. After you extract the JBoss Fuse folder, what directories will be there in it?
JBoss Fuse consists of the following directories.

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

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

Q. What is the Red Hat JBoss Fuse container?
The Red Hat JBoss Fuse container is a that supports various deployment models like FAB deployment, WAR deployment, and OSGi bundle deployment. It can be integrated with Apache Maven to download and install the required artifacts dynamically at deploy time.

Q. Explain the deployment models of JBoss Fuse?.
There are three types of deployment models in JBoss Fuse.

  • OSGi bundle deployment model – A bundle shares all the required dependencies, which minimize resource consumption.
  • FAB deployment model – The metadata will be embedded into the FAB. The JBoss Fuse container analyzes the metadata and automatically installs the requisite dependencies from Apache Maven.
  • WAR deployment model – A WAR is packaged together with all of its dependencies. Since the libraries are available in WAR, the container doesn’t have to resolve the WAR’s dependencies.

Q. What is the difference between blueprint and spring dependency injection frameworks in JBoss Fuse?
Both blueprint and spring are dependency injection frameworks that are used to configure all the dependencies for the applications. Spring is based on Java, and the blueprint is OSGi-specific. Blueprint can install dependencies dynamically at runtime. Spring expects developers to specify the dependencies.

Q. What Should Be The Features Of An Integration Application According To You?

  • Depending at the need and different comparable factors, any integration application has capabilities that allow it carry out its challenge certainly. A few of them are indexed beneath.It should be like minded irrespective of the generation on which the alternative apps that needs to be included as based on.
  • It should enable agencies to reveal and manipulate all of the apps centrally.
  • The bandwidth requirement should match with the companies requirements.
  • It must be unfastened from any shape of insects.
  • The integration utility should be reliable, have precision, in addition to accuracy.
  • It need to supply users get entry to to integrate a big wide variety of apps with every other.
  • The downtime have to be low.

Q. Why It Is Necessary In Businesses To Connect All The Information Sources In The Present Scenario?

Currently, there are unique obligations that every group has to perform as a way to run a enterprise easily. There is nothing incorrect to mention that these duties and approaches are in large part depending on every different. A user have to have all the information available with him to attain a selected end result. Therefore connecting the entire facts supply is obligatory in any commercial enterprise.

Q. What Is Software-as-a-provider Approach?

It is essentially the licensing and shipping model of a software program which is to be had on-line and customers can get admission to them primarily based on a subscription. Software or programs in this class are centrally hosted and there’s a want to have a web browser to get admission to the same.

Q. What Do You Mean By The Term Esb? What Is Its Significance In Data Or Information Integration?

ESB stands for Enterprise Service Bus. This method is useful in relation to imposing a channel between the software packages which can without difficulty be interacted. It may be in any shape. Sometime there’s a want to have extra tool and alertness to implement this technique. If the packages are simple, they may be connected thru a simple channel. However, this approach has a restrict and therefore different procedures consisting of FuseESB are considered.

Q. During 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?

This hassle is common however it has a solution. The first aspect a common or a general layout may be considered and all of the information needs to be transformed into that. It cannot be accomplished manually because it consumes a lot of time and efforts. Generally the mixing application that’s taken into consideration has this ability with it. It converts all of the facts or information into virtual formats this is generally inside the shape of zero’s and 1’s.

Q. Give Three Major Reasons Of Application Integration In A Business?

  • Time and price saving up to a great extent.
  • While acting a particular task, users can make sure the availability of all the records and in reality, technology which guarantees higher results.
  • Reliability, efficiency, as well as better productivity at the same time may be assured.

Q. What Is An Api? Is There A Need For Same When It Comes To Data Or Application Integration?

It stands for Application Programming Interface and is largely a fixed of protocols and essential definitions for developing specific software program. It plays a extensive position in the development of integration and different programs. It also can be taken into consideration as targeted data that in reality states the techniques and strategies on which one of a kind software components talk with every different. It commonly includes specs for variables, workouts, remote calls, item classes, templates, statistics shape and so on.

Q. What Are The Factors That You Should Pay Attention To Before Considering Data Or Application Integration?

The information need to be of superior great and is free from any shape of insects. This is important due to the fact later it is able to interrupt the functionality of apps and might even cause providing false information this means that losses. Testing the mixing apps is likewise important to get the expected outcomes.

Q. How Many Connectors Are Present In The Fuse Esb?

Fuse ESB includes one hundred fifty connectors which are included in the bundle.

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