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Hortonworks Exam HDPCD Topic 2 Question 24 Discussion

Actual exam question for Hortonworks's Hortonworks Data Platform Certified Developer exam
Question #: 24
Topic #: 2
[All Hortonworks Data Platform Certified Developer Questions]

Workflows expressed in Oozie can contain:

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Oozie workflow is a collection of actions (i.e. Hadoop Map/Reduce jobs, Pig jobs) arranged in a control dependency DAG (Direct Acyclic Graph), specifying a sequence of actions execution. This graph is specified in hPDL (a XML Process Definition Language).

hPDL is a fairly compact language, using a limited amount of flow control and action nodes. Control nodes define the flow of execution and include beginning and end of a workflow (start, end and fail nodes) and mechanisms to control the workflow execution path ( decision, fork and join nodes).

Workflow definitions

Currently running workflow instances, including instance states and variables

Note: Oozie is a Java Web-Application that runs in a Java servlet-container - Tomcat and uses a database to store:

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