Just like with all other punctuation, one space.
The correct answer to your question depends on your writing style. If you usually put one space after a period when you are typing (as I have done), then you would put one space after an exclamation point. If you usually put two spaces after periods, put two spaces after the exclamation point. In short, treat the exclamation point like a period or question mark.
Question mark (?) is put at the end of a sentence to indicate that it is a question.
no spaces
No. it's not necessary to put a period after a question mark.
No, a question mark alone is sufficient.
I was taught to put one after a comma or a semicolon and two after a colon or after a sentence (after a period, an exclamation mark or a question mark). However, some applications, like WikiAnswers, automatically reduce every occurrence of two spaces to one space.
You use a question mark because it's a question. You are asking them how they are doing.
you put an upside down question mark in the beginning and then a regular question mark at the end. Example: ¿Donde esta? The way to do a updside down question mark when typing is: SHIFT+CTRL+ALT+?
out
A question mark (?)
at the end
In a quotation question, the question mark should be inside the quotation. "Where did Mark go?" asked Zack. Anna replied, "I don't know. Where did he go?"