What was done from scratch, and what improvements were made?

The question "What was developed from scratch and what was modified?" usually relates to understanding which parts of the system or project were fully developed independently (from scratch), and which were modified or changed based on an existing solution.

For the answer, it is important to:

• Clearly distinguish the functionality that was created from scratch and the one that was modified.
• Indicate the reasons why the decision was made to modify the existing solution rather than rewrite it.
• Provide specific examples of modifications (e.g., adding new features, fixing bugs, optimization).

Example answer: "The architecture of the authorization module was developed from scratch, including basic authentication mechanisms and session storage. Modifications involved integration with external services, adding support for new protocols, and improving the user interface."