Interview Questions.

Q1. What Is The Difference Between Blueprint And Spring Dependency Injection Frameworks?

When new dependencies are delivered in blueprint through XML schema namespaces, blueprint has the capability to solve these dependencies routinely at run time. By evaluation, whilst packaging the task as an OSGi package, spring expects developer to add new dependencies explicitly to the maven-bundle-plugin configuration.

Q2. Explain Apache Cxf?

Red Hat JBoss Fuse's embedded Web and RESTful offerings framework is primarily based on Apache CXF, and presents a small footprint engine for developing reusable web offerings along side carrier-enabling new and legacy packages as part of an integration solution.

Red Hat JBoss Fuse supports a variety of requirements and protocols for developing internet offerings, such as SOAP and WSDL among others, and allows for Contract-first or Code-first improvement with JAX-WS. In addition, Red Hat JBoss Fuse gives a widespread way to construct RESTful services in Java with JAX-RS.

Q3. What Is The Full Form Of Osgi?

Open Source Gateway initiative.

Q4. What Is Apache Camel?

In an organisation, a number of systems of various sorts exist. Some of those can be legacy structures at the same time as some can be new. These structures often engage with every different, and want to be incorporated. This interaction or integration is not easy because the implementations of the structures, their message codecs can also range. One way to acquire that is to put in force code which bridges these variations. However this may be factor to factor integration. If day after today again if there may be change in a gadget the opposite might also have to be modified this isn't always suitable.

Instead of this factor to point integration which causes tight coupling we can put into effect an extra layer to mediate the differences between the structures. This consequences in loose coupling and no longer affects an awful lot our present systems. Apache Camel is a rule-based totally routing and mediation engine that offers a Java item- based totally implementation of the Enterprise Integration Patterns using an API (or declarative Java Domain Specific Language) to configure routing and mediation regulations.

Q5. How Is Osgi Implemented For Jboss Fuse?

By deploying the application as bundles.

Q6. Have You Exposed A Web Service Endpoint Using Apache Camel And Deployed It On Jboss Fuse?

Yes. Using Apache CXF exposed an internet provider to be ate up. Used Contract first approach to generate the instructions from wsdl.

Q7. Explain Apache Camel?

Red Hat JBoss Fuse utilizes Apache Camel for constructing integration and routing solutions using Enterprise Integration Patterns (EIPs). Each route defines an integration route between endpoints, wherein a system can both ship or acquire messages, and at the same time as data is in those routes it may be trformed, demonstrated, intercepted, and so forth.

Routes may additionally exchange endpoints dynamically; either as additional bundle are activated, based totally at the content material of the message, or through additional methods. With over a hundred and forty defined endpoints Red Hat JBoss Fuse lets in for integration with a ramification of services immediately upon deployment.

Q8. Name The Different Components Of Jboss Fuse?

Apache Camel 

Apache CXF

Apache ActiveMQ

Fabric8

Switchyard

Q9. What Is An Esb? Have You Deployed Camel On Any Esb?

ESB stands for Enterprise Service Bus. It can be described as a device designed to assist put into effect an software the usage of SOA ideas Not for all initiatives is the usage of ESB an most useful answer ESB ought to be used whilst initiatives involve integrating a number of Endpoints like Web offerings, JMS, FTP and so on. Have deployed JBoss Fuse ESB for Apache Camel Deployment.

Q10. Explain Fabric8?

Fuse Fabric is a era layer that permits a collection of boxes to shape a cluster that shares a commonplace set of configuration statistics and a common set of repositories from which to get right of entry to runtime artifacts. This lets in one to run some of bins either for your very own hardware or within the open hybrid cloud, and permits for configuration control, service discovery failover, load balancing, centralized monitoring amongst different benefits.

Q11. Explain Switchyard?

Switchyard is a lightweight carrier delivery framework presenting complete existence-cycle guide for  growing, deploying, and managing provider-oriented applications. It allows you to install and run offerings with restrained dependencies, and consists of additives inclusive of composite offerings and composite references.

Q12. Explain Apache Activemq?

Red Hat JBoss Fuse's embedded messaging carrier is primarily based on Apache ActiveMQ. It supports the standard JMS 1.1 capabilities and offers a extensive variety of prolonged JMS functions for building strong and dependable messaging applications. Red Hat JBoss Fuse consists of both a messaging broking and patron-aspect libraries that enable remote communique amongst allotted purchaser applications.

Red Hat JBoss Fuse helps Point-to-Point and Publish/Subscribe messaging along side both persistent and nonpersistent messages; similarly, ActiveMQ may be scaled both vertically and horizontally to allow for processing of a massive volume of messages for a large range of concurrently linked clients.

Q13. How Is The Application Deployed As Bundles?

This is completed through the use of the Apache Felix Plugin.

Q14. What Is Fabric?

Fuse Fabric is an open-source integration platform for deep management of Java Containers (JVMs). It is a supported factor of the JBoss Fuse Platform. Fuse Fabric makes it truly easy to provision, automate, configure, and manipulate from a significant vicinity with a constant User Interface and User Experience.

Q15. What Is Osgi?

OSGi stands for Open Source Gateway initiative.

It presents the advantages:

A transportable and relaxed execution environment based totally on Java.

A service management gadget, which can be used to check in and percentage offerings throughout bundles and decouple service providers from carrier consumers.

A dynamic module device, which can be used to dynamically installation and uninstall Java modules, which OSGi calls bundles.

A light-weight and scalable solution.

Q16. Explain Jboss Eap?

Red Hat JBoss EAP 6 is a JEE certified container that leverages a bendy, modular structure, and it integrates EJB additives, net services, protection, and clustering. By making use of a JEE container you've got complete get entry to to JEE additives together with patience and the injection framework.

Q17. Explain Apache Karaf?

Red Hat JBoss Fuse is based on Apache Karaf, a powerful, light-weight, OSGi-primarily based runtime field for deploying and dealing with bundles to facilitate componentization of Red Hat JBoss Fuse programs. Red Hat JBoss Fuse additionally provides native OS integration and may be included into the working system as a carrier in order that the lifecycle is certain to the running gadget.

Furthermore, Red Hat JBoss Fuse extends the OSGi layers with an extensible console for managing programs and administering instances, a unified logging subsystem supported through Log4J, each manual and hot deployment of OSGi bundles, and a couple of mechanisms for putting in programs and libraries amongst others.

Q18. What Is Apache Karaf?

Apache Karaf is an OSGi based totally runtime; it is wherein our Application bundles run. Fuse uses Apache Karaf as its runtime wherein bundles run and collaborate to offer business functionality.

Q19. What Is Esb?

An ESB is a standard based totally integration platform that mixes messaging, internet offerings, datagrams formation, and shrewd routing to reliably connect and coordinate the interplay of considerable numbers of numerous applications across extended organisations with tractional integrity.

Q20. What Is Switchyard?

Switchyard is a component-primarily based improvement framework centered on constructing established, maintainable offerings and packages using the ideas and quality practices of SOA. It works with Apache Camel to offer a fast, simple, flexible integration runtime with comprehensive connectivity and trports.

Q21. Name The Different Containers Which Jboss Fuse Supports?

Apache Karaf

JBoss Enterprise Application Platform