“Yes or No” questions do not have a question word in dialectal Arabic.
Intonation will indicate if it is an inquiry
As in
دا توم؟
Means
Is that Tom?
الرَّقَمْ غَلَط
/irraqam ghalaT/
Means
Wrong number
الخَط مَشْغول
/ilkhaT mashghool/
Means
Line is busy
سارَة مَوجودة؟
/saarah mawgoodah/
Means
Is Sara there?
سامي مَوجود؟
/saamee mawgood/
Means
Is Sami there?
For more info regarding the Arabic alphabet and how to learn Arabic online,
you can download the Arabic learning app Kaleela application to learn Arabic the right way.