TIMED CODING TESTS

11 curated timed coding tests.

Each test is a fixed bundle with a deliberate difficulty mix — a starter still hides a hard question, an advanced one still warms you up. Questions are drawn fresh from the library every time you sit one. The full composition of each test is on this page before you sign in.

11tests

7languages

130questions

JavaScript tests

JavaScript

Starter

JavaScript Fundamentals

Closures, scope, equality: the bread and butter every JS dev needs.

6 easy · 3 medium · 1 hard

10 questions~12 minStart

Browse JavaScript questions

JavaScript

Advanced

JavaScript Deep Dive

Event loop, prototypes, async pitfalls. These separate the seniors.

2 easy · 7 medium · 6 hard

15 questions~20 minStart

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TypeScript tests

TypeScript

Starter

TypeScript Essentials

Types, generics, narrowing. Write TS with confidence.

5 easy · 4 medium · 1 hard

10 questions~12 minStart

Browse TypeScript questions

React tests

React

Starter

React Essentials

Hooks, props, state. Components done right.

6 easy · 3 medium · 1 hard

10 questions~12 minStart

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React

Advanced

React Patterns & Performance

Memo, refs, suspense, server components: production React.

2 easy · 7 medium · 6 hard

15 questions~20 minStart

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Python tests

Python

Starter

Python Fundamentals

Lists, dicts, comprehensions. Get the basics rock solid.

6 easy · 3 medium · 1 hard

10 questions~12 minStart

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Python

Intermediate

Python Intermediate

Decorators, generators, OOP quirks. Level up your Python.

3 easy · 7 medium · 5 hard

15 questions~18 minStart

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Java tests

Java

Starter

Java Fundamentals

Classes, interfaces, collections: the JVM essentials.

6 easy · 3 medium · 1 hard

10 questions~12 minStart

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Java

Intermediate

Java Intermediate

Streams, generics, concurrency: interview-grade Java.

3 easy · 7 medium · 5 hard

15 questions~18 minStart

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HTML tests

HTML

Starter

HTML Essentials

Semantics, forms, accessibility: markup that holds up.

6 easy · 3 medium · 1 hard

10 questions~10 minStart

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CSS tests

CSS

Starter

CSS Essentials

Box model, flex, grid. Make layouts behave.

6 easy · 3 medium · 1 hard

10 questions~10 minStart

Browse CSS questions

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