Questions related to testing of input fields

Questions related to testing of input fields.

Including different types of input: text, number, radio, checkbox, time, password etc. Main focus here is testing input feedback and data validation.

References:
https://en.wikipedia.org/wiki/Category:Graphical_control_elements
http://ui-patterns.com/patterns/InputFeedback
https://en.wikipedia.org/wiki/Data_validation