What is happening?

What is going on?

what's up? 
what's going on?

What's happening?

What is happening?

Kya - What
ho raha - is happening

what is going on?

what's up?

What is happening or What's up

what's going on?

what's going?

1) What's up?
2) What is happening?

Agar aap kisi se pooch rahe hai ki kya kar rahe ho toh pehla wala

What are you doing?