When it comes to punctuation, it's usually best to stick with one mark per sentence. While a string of question marks may seem like an effective way to express confusion or emphasize a gesture, action, or line of dialogue, many grammar experts consider this usage to be inappropriate. Therefore, unless it is in informal correspondence, the use of multiple question marks should be avoided. That said, there are certain situations where the use of multiple question marks is grammatically correct. For example, when several questions are asked in the same sentence, you can use a question mark instead of a comma to indicate each one.
This should only be done in works of fiction, mainly in dialogue. If the question mark applies to the entire sentence rather than to what is inside the parentheses, then it must be placed at the end. Additionally, there is a special type of question mark known as the rhetorical question mark. This is used in non-formal situations and should be placed at the end of a sentence that asks a question. In documents where the exclamation mark isn't appropriate, there's nothing wrong with using a question mark. The use of several question marks is not correct in detail; however, double question marks are often used to emphasize the previous question.
This can be seen in both formal and non-formal writing and in cases where direct and indirect questions are asked. You may also be surprised to learn that the question mark can work in some pretty unique situations. For example, it can replace a comma when necessary. It can also be combined with an exclamation mark to create an interrobang (or interabang), which is essentially a question mark superimposed on an exclamation mark. To sum up, while it's generally best to choose one punctuation mark for each sentence, there are certain situations where multiple question marks can be used correctly. Just remember that if your sentence asks a question, it should end with a single question mark.