Test description

This test was designed to check a candidate’s knowledge of R statistical language at medium level with medium coding skills, who is up-to-date with the latest features and most common packages used by programmers. The questions include pieces of code that evaluate the understanding of R. The test focuses on five main areas of data scientist skills, specifically: programming, importing data, data cleaning, data manipulation, and data visualization.

Topics: R, dplyr, ggplot2, data.table, tidyr, stringr, readr.

Sample questions

Select the code to return the following output:

x <- c(1,2,3,4)

Expected output:

[1] TRUE