If your question starts with the words, 'who, why , what, when, where and how, your sentence will require a question mark
Use a question mark to create an interrogative sentence -- one that asks a question.
You use a question mark because it's a question. You are asking them how they are doing.
You use a question mark (?) as the punctuation after the sentence or question you are asking.
A question mark is a punctuation mark, it replaces the use of a full stop at the end of a sentence that is asking a question.
No you should only use a question mark.
If you are posing a question, use a question mark (?) for punctuation.
You can end a sentence with a period.Hey, end it with an exclamation mark!What was the question?
It would not be common practice to have a colon and question mark ever in sequence.
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I use my left pinky to press and hold "Shift" and press the question mark key with my right pinky.
A period isn't required when you use a question mark. In other words, only one should be used.