VIP Exclusive
R Programming Language Certification VIP Practice Exam
R Programming Language Certification — There is no single universally standardized 'R Programming Language Certification' from a single issuing body; Posit (formerly RStudio) offers Tidyverse Instructor Certification, and DataCamp/Coursera offer skill-based R certificates — this is an original comprehensive practice exam modeled on the knowledge domains tested across these programs and professional R competency assessments, covering core R, data wrangling, visualization, statistical computing, and software engineering best practices.
53
Questions
90m
Time Limit
75.00%
To Pass
Question 1 of 53👑 VIP
A data scientist loads a CSV file and notices that a column named 'revenue' was imported as a character vector because some rows contain the string 'N/A' instead of a proper NA. Which code sequence correctly converts the column to numeric while ensuring those 'N/A' strings become NA rather than producing a warning?
Questions 2–53 and full explanations are VIP-exclusive.