Most frequently asked jBPM Interview Questions
- What is jBPM?
- Workflow Components of jBPM?
- What are the features of jBPM?
- What is a rule engine?
- What are the advantages of Rule engine?
- Name the core Services of jBPM?
- Explain Semantic Module?
- What is global in the DRL file?
- What are the components required to configure a cluster with JBoss?
- What is the difference between BPMN and BPEL?
- What is the difference between Drools and jBPM?
- What is Form Modeler?
- What is BPMN good in?
- What is JTA?
What is jBPM?jBPM is a flexible buisiness management that is written in Java language.It is a tool that helps us in managing complex processes in an efficient way. jBPM also helps in filling the gap between the business analysts and the developers, as it is light weighted and open source in nature.
Workflow Components of jBPM?
- Start Event
- End Event
- Rule Task
- Gateway (diverge)
- Gateway (converge)
- Reusable Sub-Process
- Message Event
- User Task
- Embedded Sub-Process
- Multiple Instances
What are the features of jBPM?Features of jBPM are:
- Support BPMN 2.0
- Support Persistence and Transaction
- Eclipse-Based and Web-Based
- Rule Engine
What is a rule engine?A rule engine is a statement interpreter. The statements that are interpreted is known as rule engine.
What are the advantages of Rule engine?
- Rule Engine helps us to keep our rules in a Knowledge base and can adapt decisions easily when they are changing.
- Rules are easier to grasp with the help of rule engine
- Improved maintainability
- Reasonable performance
- With rule engine it is possible to change the rules and processes without even stopping the whole application
Name the core Services of jBPM?Deployment Services
Runtime data Services
Explain Semantic Module?
What is global in the DRL file?Global helps to use drools for defining a global variable.The variable that is visible to all rules inside a DRL file is called Global variable.The changes in a global variable are not notified to the working memory so it must be used very carefully in a DRL File.
What are the components required to configure a cluster with JBoss?There are some libraries that are generally used for clustering:
- Clustered beans
- HTTP session replications
What is the difference between BPMN and BPEL?BPEL ia an XML process with a strong focus on automation whereas BPMN is a grafical business process notation.
What is the difference between Drools and jBPM?Drool is a rule engine whereas jBPM is the workflow of engine
Drool helps for making local decisions that only require a handful of rules whereas jBPM is a management that makes the interaction between humans and services into a machine that fulfills a well-defined and complex business process goal.
Drool and jBPM are companion projects that are integrated when we need workflow with rules.
What is Form Modeler?Form modeler is a form engine that helps the users in creating forms to capture and in displaying information during process without any help of coding or template markup skills.Form Modeler provides a Formula Engine that you can use to automatically calculate field values.
Features of Form modeler:
Data binding for Java objects
Formula and expressions
Customized forms layouts
What is BPMN good in?BPMN is good in documenting established business processes and designing new business processes.It is also good for making modules of structured business processes despite of some variations and shares the same structure and will be possibly bt automating.
What is JTA?JTA(Java Transaction API) is used to manage transactions in java and also provides us to start, commit and rollback trasactions in a natural ways.
It allows applications to perform distributed trasactions.JPI comprises of three components:
Supreme state application exchange division interface High-class transaction chief interface proposed for an application server Standard Java mapping of the X/Open XA convention planned for a value-based asset administrator.