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. Take it when you feel ready, and retake it as often as you like.

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, so a refresh will not lose it.

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 result is meaningful only because the people who claim it earned it honestly.

Your name

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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

You passed the dplyr assessment

Nicely done, . This result is shown here, on this device.

XP earned

Correct

Time

This result is shown on this page only. For a certificate recorded against your account, that anyone can check, see the track certifications.

Close, but not quite there

You need 13 of 18 XP to pass. The topics you missed are listed below. Work through them and retake this whenever you are ready.

XP earned

Correct

Time

XP needed