Even when said as one thought with NO pause and NO change of the timbre of the voice, this construction takes two question marks. …Were your car windows open? Do you remember? …Was your radio on? Do you know? Reversing the subject and verb in English is the indication that there is a question. These are questions — …
The Indirect Question
The indirect question always occurs in a dependent clause and never has question word order, i.e., never reverses the subject and verb. The indirect question takes a period. …I want to know where you were. Direct question would be “Where were you?” …I am asking about how long it took. Direct question would be “How long did it take?” …My …
What Do I Do with “My question is where are you going?”
When there are two parts to the sentence, one that makes a statement (…my question is…) and one that asks a question (…where are you going…), it is the one at the end that determines the terminal punctuation. So there is an interrog at the end of this sentence. We have question word order. It is a question. I would …