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OptPrep 1.0.0

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@Coflazo Coflazo released this 02 Oct 20:29
v1.0.0
e365736

Free practice for the Optiver online assessment. Open it at coflazo.github.io/optprep, or run it yourself with npx optprep (Node 20 or newer).

OptPrep in 22 seconds

What you get

  • Every task on its real clock: 80-in-8, Beat the Odds, NumberLogic, Likelihood List, Intervals, Orderbooks and nine Zap-N games, with exam replicas matched to the battery you sit.
  • A lesson for every question type, in short steps with a question after each one.
  • A worked solution for every answer: the question restated, a picture, the steps, the shortcut you can use inside the time limit, and a sanity check.
  • A roadmap for each task with five levels per skill, a daily goal, and a list of the patterns that keep costing you points.
  • A market-making round for the interviews that come after the online assessment.
  • It runs offline and installs as an app on desktop and phone. Your progress stays on your device; sync to a private gist in your own GitHub account is optional.

How it was checked

  • 3,094 library questions re-solved by an independent C++ and Python pipeline: 0 failures. 607 Zap-N game instances re-solved: 0 mismatches.
  • 738 JavaScript, 19 Python and 34 C++ tests pass on Linux, macOS and Windows.
  • Lighthouse on the live site: 99 performance, 100 accessibility, 100 best practices, 100 SEO.

Good to know

  • Optiver publishes no pass marks. The Ready mark means your recent exam replicas met OptPrep's own bar, which sits above what candidates report.
  • If your online assessment looked different, open a format report and the next release will match it.

The video below is the same tour with sound.

OptPrep is a personal project shared for free. It is not affiliated with, endorsed by or connected to Optiver. MIT license.

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