Can you list the types of data verification or validation levels encountered in development?

Data validation in development is usually divided into several levels:

• Client-side validation — checking data on the user's side (e.g., in the browser) to quickly catch errors and improve UX.
• Server-side validation — mandatory checks on the server for security and data integrity.
• Database-level validation — constraints and checks set within the database itself (e.g., uniqueness, data types).
• Business logic validation — data checks considering the application's specifics (e.g., access rights verification, logical conditions).

Each level complements the other, ensuring the application's reliability and security.