Browse available assessments and see what each one tests.
Covers C++ fundamentals, memory, the STL, performance and debugging.
What it coversCovers Go fundamentals, interfaces, concurrency, HTTP services, testing and performance.
What it coversCovers Java fundamentals, collections, object design, concurrency, the JVM and backend work.
What it coversCovers JavaScript fundamentals, async behavior, objects, browser APIs and debugging.
What it coversCovers the Node.js runtime, async work, APIs, streams, reliability and security.
What it coversCovers Python fundamentals, data structures, functions, errors, testing and performance.
What it coversCovers React components, state, effects, rendering, data flow and performance.
What it coversCovers React Native UI, navigation, native APIs, performance and release work.
What it coversCovers TypeScript fundamentals, narrowing, generics, unions, API typing and maintainability.
What it coversCovers document modeling, queries, indexes, aggregation, transactions and operations.
What it coversCovers relational modeling, SQL, indexes, transactions, performance and database operations.
What it coversCovers filtering, joins, aggregation, CTEs, window functions and query reasoning.
What it coversCovers framing a question, cleaning data, exploring it, choosing metrics and explaining the result.
What it covers