Does my Nikon D200 have

Nikon D 200 doest have any filters built in,to protect lens use ND or NC filters . for effect use requred filter

Your camera doesn't have any filters built in, but you can simulate a lot of the filter effects in post-processing. You would be advised to have polarizing filters for your lenses, and possible neutral density graduated fiters (which do work in the Cokin System). Those are difficult to do without.

Cameras in this class (prosumer / professional dSLR) don't have filters built in. They don't even have lenses built in - and that's considered a benefit.

Filters generally do two things: (1) they protect the front of the lens from physical damage and (2) they change the light that goes through the lens. (1)For many lenses it is a good idea to have a UV filter as protection (this filter cuts out invisible UV spectrum rays and does basically nothing to the image). For ultra-wide angle lenses and fisheye lenses you need to check - some require thin mount filters some do not take filters at all.

(2) To change the color efffects in a way that film photography used filters, photo manipulationm software offers similar to identical effects to the extent that in Photoshop some effects are even named after the filters they replace. The exception is the polarizing filter. It works like your polarizing sunglasses, creates deep colors, nice cloud contrast and cuts non-metallic reflections. Get the best you can find - your D200 deserves it.

There is of course an exception: Most digital cameras in fact do have a filter in front of the CCD to cut out infrared spectrum and create a better image in the visible spectrum. In some cameras this filter can be removed and this turns yoru camera in an IR-camera. DON'T try this at home - you need to know what you're doing and it is a one-way process - no going back.