Code Quizzes
Three practice labs for timed coding assessments: JavaScript, React and SQL in its Snowflake flavour. Each one maps the syntax that gets tested most, and a quiz draws 20 random questions from that map and grades them at the end.
JavaScriptTwelve syntax patterns behind most JavaScript assessment questions: arrays, objects, closures, promises and the event loop, with a 20-question practice quiz.
12 patterns · 40 questions · Open the lab →
ReactTwelve React patterns behind most assessment questions: components, useState, immutable updates, effects, forms, memoisation and the Next.js App Router, with a 20-question practice quiz.
12 patterns · 38 questions · Open the lab →
SQLThirteen SQL patterns behind data-engineering and analytics assessments, Snowflake flavour: aggregation, GROUP BY and HAVING, window functions, QUALIFY, CTEs, JSON and MERGE, with a 20-question practice quiz.
13 patterns · 51 questions · Open the lab →