Hadoop interview questions part 39
Hadoop interview questions part 39
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Total Questions: 20
1. For ________, the HBase Master UI provides information about the HBase Master uptime.
Correct Answer is : HBase
2. ________ NameNode is used when the Primary NameNode goes down.
Correct Answer is : Secondary
3. Point out the wrong statement :
Correct Answer is : DataNode is aware of the files to which the blocks stored on it belong to
4. Which of the following scenario may not be a good fit for HDFS ?
Correct Answer is : HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
5. The need for data replication can arise in various scenarios like :
Correct Answer is : All of the mentioned
6. ________ is the slave/worker node and holds the user data in the form of Data Blocks.
Correct Answer is : DataNode
7. HDFS provides a command line interface called __________ used to interact with HDFS.
Correct Answer is : “FS Shell”
8. During start up, the ___________ loads the file system state from the fsimage and the edits log file.
Correct Answer is : NameNode
9. __________ is a server based Bundle Engine that provides a higher-level oozie abstraction that will batch a set of coordinator applications.
Correct Answer is : Oozie v4
10. Point out the correct statement :
Correct Answer is : All of the mentioned
11. ___________ is a Java Web application used to schedule Apache Hadoop jobs
Correct Answer is : Oozie
12. Oozie Workflow jobs are Directed ________ graphs of actions.
Correct Answer is : Acyclical
13. Point out the wrong statement :
Correct Answer is : None of the mentioned
14. Oozie v2 is a server based ___________ Engine specialized in running workflows based on time and data triggers
Correct Answer is : Coordinator
15. Which of the following is one of the possible state for a workflow jobs ?
Correct Answer is : PREP
16. Oozie can make _________ callback notifications on action start events and workflow end events.
Correct Answer is : HTTP
17. A workflow definition is a ______ with control flow nodes or action nodes.
Correct Answer is : DAG
18. Which of the following workflow definition language is XML based ?
Correct Answer is : hpDL
19. ___________ nodes are the mechanism by which a workflow triggers the execution of a computation/processing task.
Correct Answer is : Action
20. Point out the correct statement :
Correct Answer is : All of the mentioned
