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R Fundamentals Mastery Assessment

A concept-and-code assessment of R fundamentals: vectors, control flow, functions, and the core data structures. Pass once and your certificate is permanent and publicly verifiable. Take it when you feel ready.

10 questions · 7 concept + 3 code · ~12 min · 13 / 18 XP to pass · Unlimited retakes · Level Intermediate

What to expect during the assessment

One question at a time. The progress timeline lets you jump back to review answered questions.
Mix of concept multiple-choice and live R code-writing (tested against hidden assertions).
Hints are available per question but each one used costs −0.5 XP.
A timer counts up. There is no time limit, but well-prepared candidates finish in 10–15 minutes.
Your progress is saved as you go — refresh-safe.

Honor code

This assessment tests your understanding, not your ability to look things up. I trust you to attempt it on your own, without consulting external resources, in one sitting. The certificate is meaningful only because the people who hold it earned it honestly.

Your name — as it should appear on the certificate

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I agree to the honor code. I will attempt this assessment on my own, without consulting external resources or other people, in one sitting.

Question 1 of 10

☀ Hints (0 / 2 used) −0.5 XP per hint

Result · Passed

You earned the R Fundamentals Mastery Certificate

Share it on LinkedIn, your resume, or anywhere your work is on display. The verification link below proves the certificate is genuine.

XP earned

Correct

Time

Percentile

r-statistics.co · Verifiable credential · Public URL

This document certifies that

has demonstrated mastery of

R Fundamentals

Awarded for passing a concept-and-code assessment of R fundamentals: vectors, control flow, functions, and core data structures on r-statistics.co.

Issued ID XP

Verify at

Back to exercises

Not yet · Try again

Close, but not quite there

You need 13 of 18 XP to pass. Brush up on the topics you missed and retake when you're ready — most candidates pass on the second attempt.

XP earned

Correct

Time

XP needed