MapReduce Programming Model Quiz
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Questions and Answers

What is the purpose of the master instance in the MapReduce programming model?

  • Partitioning the input data and coordinating the Map and Reduce phases (correct)
  • Writing the final results to a shared storage server
  • Reading the results of the Map phase and merging the partial results
  • Storing the results of the processing on the local disks

    • What is the role of the Reduce instances in the MapReduce programming model?

  • Partitioning the input data and coordinating the Map and Reduce phases
  • Reading the results of the Map phase and merging the partial results (correct)
  • Storing the results of the processing on the local disks
  • Writing the final results to a shared storage server

    • How does the MapReduce programming model handle the processing of input data?

  • All instances read and process data segments, storing the results on a shared storage server
  • Master instance reads and processes data segments, storing the results locally
  • Reduce instances read and process data segments, storing the results locally
  • Map instances read and process data segments, storing the results locally (correct)

    • When does the application using MapReduce terminate?

    <p>When all the Reduce instances report task completion</p> Signup and view all the answers

    What inspired the MapReduce programming model?

    <p>The map and reduce primitives of the Lisp programming language</p> Signup and view all the answers

    What is the role of the master instance in the MapReduce programming model?

    <p>Partitioning the input data and monitoring the reduce instances</p> Signup and view all the answers

    What do the map instances do in the Map phase of the MapReduce programming model?

    <p>Read their input data segment and process the data</p> Signup and view all the answers

    What do the reduce instances do in the Reduce phase of the MapReduce programming model?

    <p>Read the results of the first phase and merge the partial results</p> Signup and view all the answers

    Where are the results of the processing by map instances stored in the MapReduce programming model?

    <p>On the local disks of the servers where the map instances run</p> Signup and view all the answers

    When does the application using MapReduce terminate?

    <p>When all reduce instances report task completion</p> Signup and view all the answers

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