Is the question mark ? internationally recognised as an icon for help?

1. What icon is used for help?
2. What is question mark icon?
3. What are universal icons?
4. What is the information icon used for?

What icon is used for help?

The "?" icon has been the long believed defacto standard for help. The "i" informational symbol to my knowledge is slightly newer but has also become a said standard.

What is question mark icon?

The question mark ( ? ) is found on the same key as the forward slash on US keyboards. It is used in written language to denote a question or a request for an answer to something.

What are universal icons?

Universal icons

These icons are easily recognisable and are arguably universally clear on their function. Examples of these would be the magnifying glass for search, the printer icon for printing, the home icon to navigate to the homepage and the envelope for mail.

What is the information icon used for?

The information icon (i)

Best for providing users with an extra bit of insight or knowledge. Information that is not critical, but still really good to know.