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In this post, we present to you the top 13 JBoss ESB interview questions that are put together by our industry JBoss experts. Whether you are a fresher or an experienced candidate on JBoss, go through the below frequently asked JBoss Fuse ESB interview questions and answers that help in attaining your dream job.
Ans: 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.
Ans:The following are the components of Jboss Fuse.
Ans: JBoss Fuse consists of the following directories.
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.
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Ans: SwitchYard is a lightweight service delivery framework on top of JBoss Fuse. It provides full lifecycle support to develop, deploy, and manage service-oriented applications. It works with Apache Camel along with comprehensive connectivity and transports to provide a fast, simple, flexible integration runtime.
Ans: Apache Karaf is a powerful OSGi-based runtime container to deploy and manage bundles. JBoss Fuse uses Apache Karaf as the runtime. It is where the application bundles run. Apache Karaf is built on top of OSGi Frameworks like Felix and equinox.
Ans: JBoss Fuse Fabric is a layer, which allows a few containers to form a cluster. The containers in a cluster share a common set of configuration information. It uses Apache ZooKeeper as its registry to store the node registration and cluster configuration data. The Fabric registry consists of two parts - a configuration registry and a runtime registry.
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.
Ans: 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.
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There are three types of deployment models in JBoss Fuse.
Ans: 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.
Ans: Apache CXF is a fully-featured Web services framework. It is built with a combination of Celtix and XFire. It is the building block for JBoss Fuse's embedded Web and RESTful services framework. To create reusable web services, Apache CXF offers a small footprint engine. It permits Code-first or Contract-first improvement with JAX-WS.
Ans: Yes, we uncover a REST web administration endpoint using Apache CXF. It is feasible for using either JAX-RS or CXFRS.
According to a survey, the customers of JBoss Fuse include 30% of Computer Software, 11% of Information Technology and Services, 5% of Financial Services, and so on. It provides simplified compliance and risk management to its customers. 33% of small-sized companies, 15% of medium-sized companies, and 47% of large size companies use JBoss Fuse to meet their business requirements. So, there will be a huge demand for JBoss Fuse developers.
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