Not quite, like Null-A said there is a continuous form. 'What is Julia eating' would be जूलिया क्या खा रही है? Taking the root of the verb (-ना) and adding रही (or रहा for boys, or रहे for plural or when conjugating with तुम or आप) make the verb continuous. As far as I know the present and present continuous aren't interchangeable in Hindi.
Hindi has a progressive form indeed. For this particular example here, I think it would be जूलिया क्या खा रही है? (What is Julia eating?)
Does "क्या"/"Kya" - "What" mean the same as what when asking "What did you say?"