Max Shutter speed
Leica Q-P can shoot continuously at max speed of
10.0 fps and has max shutter speed of
1/2000 sec. Q-P also has an electronic shutter which can shoot silently at max speed of
1/16000s. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Flash
Unfortunately Q-P doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Focusing
Leica Q-P features a Contrast Detection autofocusing system. The AF system has 49 points to choose from. Leica Q-P also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.