Designing new interface for a legacy web application

1. What are the 6 principles of interface design?
2. What are the interfaces of Web application?

What are the 6 principles of interface design?

The 6 principles of user interface design are Structure, Simplicity, Visibility, Feedback, Tolerance and Reuse.

What are the interfaces of Web application?

The most common Web applications are Webmail, online shopping, online document sharing, social media, and instant messaging. A vast amount of data exists now, generated by these types of interfaces.