Are you a candidate looking to sharpen your skills? Try our practice tests or view sample interview questions & Get hired by the best. Click Here×

MapReduce Online Assessment Test

Topics Covered

  • File System Counter
  • Hadoop Supplied Interfaces
  • MapReduce Version 2 Process
  • MapReduce Job methods

Useful for hiring

  • Hadoop Developer - MapReduce
  • Big Data Developer - MapReduce

Start hiring job-fit candidates using this assessment


"Interview Mocha's assessments eliminated reliance on resumes and reduced our time to hire by half. Now we spend time only on relevant candidates and take data-driven hiring decisions."

George Nichkov, Gett,
Global Analytics Team Lead

How many maps can run parallelism per node?

    • 1-10

    • 10-100

    • 100-150

    • 150-200


We have an object Student who is giving a test in Java and it has four attributes (String studentId, String studentName, String subject, int point ) to define the point of each subject that student get for three years.

If we use the partitioner as below:
public int getPartition(Customer key, int numPartitions) {
        int hash = key.getStudentId().hashCode() + key.getSubject().hashCode();
        int partition = hash % numPartitions;
        return partition;

What can be a key group to the reducer if 4 students have a point of 8 subjects and 6 students have a point with 6 subjects?

    • 48

    • 44

    • 68

    • 24


Which stage will group input by key?

    • sort

    • shuffle

    • reduce

    • None of the mentioned

Good News! You can customize this test as per your requirement

  • Choose and add questions from Interview Mocha question libraries

  • Add your own set of questions

  • Customize test settings like duration, number of questions, passing score, web proctoring and much more

  • Mail us at to create a custom test

Looking for a tailor-made test, to suit your assessment needs?

Get in touch

Global companies using Mocha assessments

  • altran
  • credit suisse
  • sephora
  • nielsen
  • capgemini
  • akamai

How Mocha assessments are brewed

Speed up your IT recruitment with Interview Mocha

  • 500+ IT skill tests
  • 20+ coding languages
  • 50+ domain knowledge tests
  • 100+ digital 2.0 skill tests
  • Customer focus aptitude tests
  • Enterprise ready features & more...

Why hiring managers and recruiters across the globe love Interview Mocha

Take your first step to hire job fit candidates