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Functional Programming Mastery Assessment

A concept-and-code assessment of functional programming in R: higher-order functions, the purrr map/reduce/filter family, closures, currying, memoization, and pure-function discipline. Pass once and your certificate is permanent and publicly verifiable.

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.

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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 Functional Programming Mastery Certificate

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XP earned

Correct

Time

Percentile

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This document certifies that

has demonstrated mastery of

Functional Programming

Awarded for passing a concept-and-code assessment of functional programming in R: higher-order functions, purrr map/reduce/filter, closures, currying, memoization, and pure-function discipline on r-statistics.co.

Issued ID XP

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Back to exercises

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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