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CSE MCQs :: Hadoop MCQs

  1. Point out the wrong statement :
  2. A.
    The Mapper outputs are sorted and then partitioned per Reducer
    B.
    The total number of partitions is the same as the number of reduce tasks for the job
    C.
    The intermediate, sorted outputs are always stored in a simple (key-len, key, value-len, value) format
    D.
    None of the mentioned

  3. Applications can use the ____________ to report progress and set application-level status messages
  4. A.
    Partitioner
    B.
    OutputSplit
    C.
    Reporter
    D.
    All of the mentioned

  5. The right level of parallelism for maps seems to be around _________ maps per-node
  6. A.
    1-10
    B.
    10-100
    C.
    100-150
    D.
    150-200

  7. Point out the wrong statement :
  8. A.
    It is legal to set the number of reduce-tasks to zero if no reduction is desired
    B.
    The outputs of the map-tasks go directly to the FileSystem
    C.
    The Mapreduce framework does not sort the map-outputs before writing them out to the FileSystem
    D.
    None of the mentioned

  9. __________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.
  10. A.
    JobConfig
    B.
    JobConf
    C.
    JobConfiguration
    D.
    All of the mentioned

  11. The ___________ executes the Mapper/ Reducer task as a child process in a separate jvm.
  12. A.
    JobTracker
    B.
    TaskTracker
    C.
    TaskScheduler
    D.
    None of the mentioned

  13. During the execution of a streaming job, the names of the _______ parameters are transformed.
  14. A.
    vmap
    B.
    mapvim
    C.
    mapreduce
    D.
    mapred

  15. The standard output (stdout) and error (stderr) streams of the task are read by the TaskTracker and logged to :
  16. A.
    ${HADOOP_LOG_DIR}/user
    B.
    ${HADOOP_LOG_DIR}/userlogs
    C.
    ${HADOOP_LOG_DIR}/logs
    D.
    None of the mentioned

  17. __________ class adds HBase configuration files to its object.
  18. A.
    Configuration
    B.
    Collector
    C.
    Component
    D.
    None of the mentioned

  19. The ________ class provides the getValue() method to read the values from its instance.
  20. A.
    Get
    B.
    Result
    C.
    Put
    D.
    Value