What does the question mark mean?

Punctuation marks. Used to express interrogative mood in the form of "? 」。

Wildcards that represent any single character in some operating systems and applications. Asterisk and are two characters commonly used in MS-DOS, WindowsNT, OS/2 and other operating systems.

Question mark is an auxiliary symbol tool of mood and intonation, which indicates the pause and mood after a sentence is finished. Used at the end of questions, rhetorical questions and rhetorical questions. Pause at the end of the question, with a question mark. A rhetorical question also ends with a question mark. Question marks generally do not appear at the beginning of a line. There are rhetorical questions and rhetorical questions.