R Programming Language Certification Professional Standards & Competencies 3

Question 1

Which practice aligns with ethical data handling standards when working with personal data in R?

Accepted Answer

Anonymizing or pseudonymizing identifiers before analysis

Answer

Anonymizing PII before analysis complies with privacy regulations and ethical data stewardship principles.

Question 2

What is the purpose of writing unit tests for R functions using the testthat package?

Accepted Answer

To automatically verify that functions behave correctly as the codebase evolves

Answer

Unit tests catch regressions early and provide confidence that refactoring or new code does not break existing functionality.

Question 3

A professional R programmer is asked to analyze data they believe may have been collected unethically. What is the appropriate response?

Accepted Answer

Raise the concern with supervisors or an ethics review board before proceeding

Answer

Raising ethical concerns through proper channels ensures accountability and compliance with professional standards.

Question 4

Which approach best supports long-term maintainability of an R analysis project?

Accepted Answer

Modular functions with descriptive names, inline comments only where non-obvious, and a clear README

Answer

Modular design, meaningful names, and targeted documentation reduce cognitive load and ease future maintenance.

Question 5

Why should R professionals avoid using attach() in production scripts?

Accepted Answer

It pollutes the search path and can cause hard-to-debug variable name conflicts

Answer

attach() adds a data frame to the search path, creating risks of silent name masking that are difficult to trace.

R Programming Language Certification Practice Test