Can i know if wife filed 498a or fir ?

Yes you can move an application in the juridictional magistrate court in which your thana comes, ask the court that is there any criminal case is registered or pending against you in the thana / ps of your juriductional area, the magistrate will give direction to the concern ps to give details of your information and then you can get the details , or you can file rti on the ps .

u can go to concerned PS to know if any FIR is registered against you by ur wife.

As well said by experts, the easy option atleast in Bangalore would be to first check in PS of your area and then go the respective magistrate courts to see if FIR has been registered (as FIR dairy gets updated every day).  Again, once a FIR is registered, your music  and "rock and roll" or " disco dance"  should have begun by now. The fact you are not sure , possibility is FIR is not registered. Roll up your sleeves dude and join the wagon soon!!! 

As well said by experts, the easy option atleast in Bangalore would be to first check in PS of your area and then go the respective magistrate courts to see if FIR has been registered (as FIR dairy gets updated every day).  Again, once a FIR is registered, your music  and "rock and roll" or " disco dance"  should have begun by now. The fact you are not sure , possibility is FIR is not registered. Roll up your sleeves dude and join the wagon soon!!!