R Language quiz and interview questions

Comprehensive R language quiz and questions from basic to advanced level that help you to review your R language knowledge and become the master of R language. Please read the following question carefully and select the correct anwser, you have to make your choice before going to the next question.

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  • What is the difference between rnorm and runif functions ?


    rnorm function generates "n" normal random numbers based on the mean and standard deviation arguments passed to the function.

    Syntax of rnorm function -

    rnorm(n, mean = , sd = ) 

    runif function generates "n" unform random numbers in the interval of minimum and maximum values passed to the function.

    Syntax of runif function -

     runif(n, min = , max = )

  • _________ uniforms and customizes plots of packages ggplot2, graphics and lattice.

  • ______ is used for Visualisation, verification and calibration of ternary probabilistic forecasts.

  • Which of the following package contains functions for reading and displaying satellite data for oceanographic applications with R ?

  • __________ is used for the analysis of air pollution data.

  • Which of the following is used to analyze paleontological time-series ?

  • Which of the following package provide namespace management functions not yet present in base R ?

  • ________ performs class prediction based on microarray data and clinical parameters

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