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  1. Point out the wrong statement :
  2. A.
    classNAME displays the class name needed to get the Hadoop jar
    B.
    Balancer Runs a cluster balancing utility
    C.
    An administrator can simply press Ctrl-C to stop the rebalancing process
    D.
    None of the mentioned

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  3. _________ command is used to copy file or directories recursively.
  4. A.
    dtcp
    B.
    distcp
    C.
    dcp
    D.
    distc

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  5. __________ mode is a Namenode state in which it does not accept changes to the name space.
  6. A.
    Recover
    B.
    Safe
    C.
    Rollback
    D.
    None of the mentioned

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  7. Point out the wrong statement :
  8. A.
    If you set the HBase service into maintenance mode, then its roles (HBase Master and all Region Servers) are put into effective maintenance mode
    B.
    If you set a host into maintenance mode, then any roles running on that host are put into effective maintenance mode
    C.
    Putting a component into maintenance mode prevent events from being logged
    D.
    None of the mentioned

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  9. Which of the following is a common reason to restart hadoop process ?
  10. A.
    Upgrade Hadoop
    B.
    React to incidents
    C.
    Remove worker nodes
    D.
    All of the mentioned

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  11. __________ Manager's Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.
  12. A.
    Microsoft
    B.
    Cloudera
    C.
    Amazon
    D.
    None of the mentioned

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  13. Point out the wrong statement :
  14. A.
    Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level
    B.
    Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode
    C.
    User data is stored on the local file system of DataNodes
    D.
    DataNode is aware of the files to which the blocks stored on it belong to

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  15. Which of the following scenario may not be a good fit for HDFS ?
  16. A.
    HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
    B.
    HDFS is suitable for storing data related to applications requiring low latency data access
    C.
    HDFS is suitable for storing data related to applications requiring low latency data access
    D.
    None of the mentioned

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  17. The need for data replication can arise in various scenarios like :
  18. A.
    Replication Factor is changed
    B.
    DataNode goes down
    C.
    Data Blocks get corrupted
    D.
    All of the mentioned

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  19. Point out the correct statement :
  20. A.
    All hadoop commands are invoked by the bin/hadoop script
    B.
    Hadoop has an option parsing framework that employs only parsing generic options
    C.
    archive command creates a hadoop archive
    D.
    All of the mentioned

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