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×

Online Data Science & Analytics Test

Topics Covered

  • Introduction to Data Science
  • Data visualization
  • Machine Learning Techniques
  • Modern data science with r
  • Data science aptitude
  • Analytics with R & other Tools
  • Exploratory Data Analysis
  • Data Manipulation using R
  • Introduction to Statistics
  • Regression Analysis

Useful for hiring

  • Data Scientists
  • Data Science Engineer
  • Data Science Developer
  • Data Science Associate
  • Data Visualization Designer
  • Data Visualization Analyst
  • Data Analyst
  • Machine Learning Engineer

Start hiring job-fit candidates using this assessment


"Interview Mocha has provided UNEECOPS with a veritable assessment platform with a comprehensive test library, online test platform, and intelligent reports. This made it easier for us to map different job openings with job-fit candidates and recruit faster."

Nisha Chandila, UNEECOPS,
Talent Acquisition Manager

Suppose I want to extract the first column of each matrix in the list. How I can do that?

    • zapply(x, function(elt) { elt[,1] })

    • lapply(x, function(elt) { elt[,1] })

    • extract(x, function(elt) { elt[,1] })


I need to save the plot to PDF file, what should I do?

    • Construct the plot on the screen device and then copy it to a PDF file with dev.copy2pdf()

    • Open the screen device with quartz(), construct the plot, and then close the device with

    • Open the PostScript device with postscript(), construct the plot, then close the device with dev.copy2pdf().

    • None of the mentioned


What does the summaryRprof() function do?

    • tabulates the R profiler output and calculates how much time is spent in the first function

    • tabulates the R profiler output and calculates how much time is spend in which function

    • tabulates the R profiler output and calculates how much time is spend in all functions

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