"What are you doing" means "तुम क्या कर रहे हो?" in Hindi. It is a present continuous tense sentence that is used to ask someone about their current activity. If someone asks you "what are you doing," you can reply with the activity you are currently engaged in, such as "मैं अभी पढ़ रहा हूँ" (I am reading now) or "मैं अभी खाना बना रही हूँ" (I am cooking now) .