Hey Ria,

Your IPU CET rank 1256 for BCA is good, but still not enough to get you in Vivekananda Institute of Professional Studies,  Rohini until 3rd round while there is tough chance to get it in the sliding round as the last year cutoff for sliding round closes around rank 1200 

Still you can apply for Spot round that take place just after the admission process are done , it is conducted in first week of August and is at the main campus to fill the vacant seat

So finally there are good chances for you get admission in VIPS

Good luck