How do you understand that the code is well executed? What criteria do you use?

High-quality code can be evaluated based on several criteria:

• Readability: the code is understandable by other developers, using meaningful variable and function names.
• Maintainability: easy to make changes and fix errors without risking breaking other parts.
• Testability: the code is covered by automated tests, reducing the likelihood of bugs.
• Performance: the code runs efficiently and does not contain redundant operations.
• Compliance with requirements: it correctly and fully implements the assigned task.

For example, if there are no questions during code review and testing, and the functionality works stably, it is a sign of high-quality code.