What are the main types of test cases in the context of data correctness verification?

The main types of test cases for data correctness verification include:

• Positive tests — verify that the system correctly processes valid data.
• Negative tests — verify that the system correctly handles invalid or incorrect data (e.g., wrong format, empty values).
• Boundary tests — check the system's behavior at the limits of acceptable values (minimum, maximum).
• Validation tests — ensure that data passes all necessary checks (e.g., required fields, formats).
• Data integrity tests — verify that data is stored and transmitted without distortion.

This approach helps ensure that data in the system is correct and properly processed.