Solve interview problems in Python

Coding problems of the kind you meet in technical interviews, and small Flask APIs to build. You write Python right in the browser and check it against hidden tests. Nothing to install; your progress is saved in your browser.

Problems

• Most frequent word

  Given a list of words, return the most frequent one; on a tie, the one that appeared first. O(n).

  EasyHashmap
  Solve →

• Notes API in Flask

  Build a small JSON API in Flask: create a note, read it by id, return 400 and 404 where they belong. Runs in your browser.

  EasyFlask · REST API
  Solve →

Spot the bug

• Spot the bug: Flask notes API

  Ten short Flask endpoints, one bug each. Tap the line that breaks, then see the request that exposes it, the fix, and the one rule behind it.

  Start →

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