Controlling Hadoop Jobs using Oozie Cognitive Class Exam Answers:-

Related Articles

Data Analysis with Python Cognitive Class Exam Answers:-

January 25, 2022

Data Science Tools Cognitive Class Exam Answers:-

January 25, 2022

Node-RED: basics to bots Cognitive Class Exam Answers:-

January 24, 2022

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