C# Quizzes

Test your knowledge of key C# concepts for mid-level professionals with this quiz. Covering topics like value vs reference types, concurrency, decimal precision, LINQ, and optimizing performance, this quiz helps you prepare for C# interviews and sharpen your industry skills.

Test your knowledge of database indexing basics, including composite and covering indexes, and understanding EXPLAIN/query plans. This quiz helps users identify key concepts, best practices, and definitions crucial for efficient database query performance.

Test your understanding of HTTP and REST fundamentals, including common status codes, the importance of idempotency in APIs, and best practices for API pagination. This quiz is designed for anyone wanting to review key concepts essential for robust web API design and operation.