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Controlling Hadoop Jobs using Oozie Cognitive Class Exam Answers:-

Course Name :- Controlling Hadoop Jobs using Oozie

Module 1 :- Introduction of Oozie Workflows

Question1 : Oozie definitions written in the Hadoop Process Definition Language (hPDL) are encoded in which of the following files?

  • workflow.txt
  • workflow.html
  • workflow.json
  • workflow.xml

Question 2: Oozie detects job completion via callback and polling. True or false?

  • False
  • True

Question 3 : The Oozie expression language (EL) provides access to all of the following except

  • error codes
  • workflow job size
  • application name
  • workflow job id

Module 2 :-  Oozie Coodinator

Question 1: Which of the following can trigger the start of an Oozie job?

  • The Oozie CLI
  • Data
  • An application call to the API
  • Time
  • All of the above

Question 2: The Oozie coordinator works with Central European Time (CET). True or false?

  • False
  • True

Question 3: The Coordinator Job uses all of the following files except

  • job.properties
  • coord-config-default.xml
  • coordinator.properties
  • coordinator.xml

Module 3 :- BigInsights Workflow Editor

Question 1: Which of the following statements about the BigInsights Workflow Editor is correct?

  • It displays a read-only diagram to show the overall workflow
  • It runs in an Eclipse environment
  • It supports complex Oozie workflows without requiring knowledge of the Oozie xml xds schema
  • It’s a new feature, and it was introduced to BigInsights in version 2.0
  • All of the above

Question 2: You can use the BigInsights Workflow Publishing Wizard as a graphical tool to create and modify a workflow.xml file. True or false?

  • False
  • True

Question 3: Which of the following statements is NOT correct?

  • The InfoSphere BigInsights Tool for Eclipse is essentially an Eclipse module with BigInsights add-ins.
  • At a higher level, we can link multiple applications to run in sequence.
  • We cannot build sub-workflows in a workflow.
  • Deployed applications can be scheduled.

Controlling Hadoop Jobs using Oozie Cognitive Class final Exam Answers:-

Question 1:  What is the primary purpose of Oozie in the Hadoop architecture?

  • To provide logging support for Hadoop jobs
  • To support the execution of workflows consisting of a collection of actions
  • To support SQL access to relational data stored in Hadoop
  • To move data into HDFS

Question 2:  How are Oozie workflows defined?

  • Using the Java programming language
  • Using JSON
  • Using a plain text file that defines the graph elements
  • Using hPDL

Question 3:  Control nodes in an Oozie Workflow can contain all of the following except

  • Start
  • Fork
  • Pig
  • End
  • Kill

Question 4:  A workflow job can be executed from

  • A Java API
  • A Web-server API
  • The command line
  • All of the Above

Question 5:  Where do the workflow.xml, config-default.xml, JAR, and .so files need to be stored prior to Oozie workflow job execution?

  • On a web-server
  • In HDFS within a defined directory structure
  • On the local file system where you are executing the job
  • None of the above

Question 6:  What is the purpose of the Oozie Coordinator?

  • To invoke workflows when some external event occurs
  • To invoke workflows when data becomes available
  • To invoke workflows at regular intervals
  • All of the above

Question 7:  Which of the following need to be stored in HDFS?

  • coordinator.xml only
  • coord-config-default.xml only
  • coordinator.properties only
  • coordinator.xml and coord-config-default.xml only
  • coordinator.xml and coordinator.properties only

Question 8:   The Oozie coordinator can be executed from

  • A Java API
  • A Web-server API
  • The command line
  • All of the Above

Question 9:  How is an Oozie coordinator configured?

  • Using the Java programming language
  • Using JSON
  • Using a plain text file that defines the workflow schedule
  • Using XML

Question 10:  By defining a dataset template as part of the coordinator.xml file, you can use the coordinator to trigger a workflow when an updated dataset has arrived in HDFS. True or false?

  • True
  • False

Question 11:  coordinator.properties can be used to establish

  • values for variables used in workflow.xml
  • values for variables used in coordinator.xml
  • the location of the coordinator job in HDFS
  • All of the above

Question 12:  job.properties can be used to establish

  • The location of the workflow job in HDFS, only
  • Values for variables used in workflow.xml, only
  • The actions to perform at each stage of the workflow, only
  • Values for variables used in workflow.xml, and the actions to perform at each stage of the workflow
  • The location of the workflow job in HDFS, and values for variables used in workflow.xml

Question 13:  The kill node is used to indicate a successful completion of the Oozie workflow. True or false?

  • True
  • False

Question 14:  The join node in an Oozie workflow will wait until all forked paths have completed. True or false?

  • True
  • False

Question 15:  Decision nodes can be used to select from multiple alternative paths through an Oozie workflow. True or false?

  • True
  • False

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