What is the focus of validation?.

Validation is aimed at checking the correctness, completeness, and compliance of data or systems with established requirements, standards, and expectations. Its key objectives:

• Quality assurance: Ensures that data is accurate, reliable, and suitable for use.
• Error prevention: Detects and eliminates potential issues early before they lead to critical failures.
• System protection: Prevents the entry of malicious or incorrect data that could damage the database or cause application instability.
• Standards compliance: Checks data conformity to specific formats, business rules, regulatory requirements (e.g., GDPR, HIPAA), or API specifications.
• User experience improvement: Provides feedback to users when incorrect input is detected, helping to correct errors.

Examples of validation:

• Email address format check.
• Mandatory fields control.
• Range check for numerical values.
• Validation of JSON or XML response structure from an API.
• Data reconciliation with master data or directories.