Java Interface MCQ

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• Which of the following parameter is to collect keys and combined values?
  ক

  key

  খ

  values

  গ

  reporter

  ঘ

  output
• Applications can use the _________ provided to report progress or just indicate that they are alive.
  ক

  Collector

  খ

  Reporter

  গ

  Dashboard

  ঘ

  None of the mentioned
• The output of the reduce task is typically written to the FileSystem via ____________
  ক

  OutputCollector

  খ

  InputCollector

  গ

  OutputCollect

  ঘ

  All of the mentioned
• Reducer is input the grouped output of a ____________
  ক

  Mapper

  খ

  Reducer

  গ

  Writable

  ঘ

  Readable
• Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.
  ক

  Mapper

  খ

  Reducer

  গ

  Writable

  ঘ

  Readable
• _____________ is used to read data from bytes buffers.
  ক

  write()

  খ

  read()

  গ

  readwrite()

  ঘ

  all of the mentioned
• ______________ is method to copy byte from input stream to any other stream in Hadoop.
  ক

  IOUtils

  খ

  Utils

  গ

  IUtils

  ঘ

  All of the mentioned
• In order to read any file in HDFS, instance of __________ is required.
  ক

  filesystem

  খ

  datastream

  গ

  outstream

  ঘ

  inputstream