Hadoop Practitioner Training - Quiz

12 Questions | Total Attempts: 408

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Software Quizzes & Trivia

Questions and Answers
  • 1. 
    What is the default replication factor in hadoop?
    • A. 

      1

    • B. 

      3

    • C. 

      2

    • D. 

      No Limit

  • 2. 
    When is a block  treated to be under replicated?
    • A. 

      When the datanode is not responding to namenode

    • B. 

      When the copies are more than the replication factor

    • C. 

      When the number of copies of a block are less than the replication factor

    • D. 

      All of the above

  • 3. 
    Diff between traditional distributed computing vs Hadoop distributed computing
    • A. 

      Code travels to data

    • B. 

      Data transfer between network is eliminated

    • C. 

      Cost effective and optimized performance

    • D. 

      All of the Above

  • 4. 
    Hadoop is designed to replace Relational databases and best suited for OLTP applications?
    • A. 

      True

    • B. 

      False

  • 5. 
    Select the ones you like
    • A. 

      Option1

    • B. 

      Option2

    • C. 

      Option3

    • D. 

      Option4

  • 6. 
    In a Mapreduce program, the number of mappers to be executed is depending on
    • A. 

      The number of filesplits/blocks that needed to be processed

    • B. 

      Goes with default setup

    • C. 

      We cannot predict it

    • D. 

      Depending on the hadoop cluster capacity

  • 7. 
    The hadoop daemons that will be running in a slave node are.
    • A. 

      Tasktracker,Secondarynamenode & Jobtracker

    • B. 

      TaskTracker &Datanode

    • C. 

      Task Tracker & Secondarynamenode

    • D. 

      Task tracker, & Jobtracker

  • 8. 
    Which one do you like?
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 9. 
    Which of the following are valid hadoop commands to copy a file from local to hdfs
    • A. 

      Hadoop fs -copyToLocal

    • B. 

      Hadoop fs -copyFromLocal

    • C. 

      Hadoop fs -put

    • D. 

      Hadoop fs -moveFromLocal

  • 10. 
    What is Speculative execution in hadoop
    • A. 

      Executing a hadoop job automatically based on oozie scheduler setup

    • B. 

      The ability of the framework that schedules a duplicate task if it takes too long to complete with a particular node/TT comparatively.

    • C. 

      User kills a job that is taking too long to complete and resubmits the same job on another machine

    • D. 

      Framework Calculates the Projected completion time of a job in hadoop

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