The Sensex is likely to open with a significant positive gap backed by strong Q2 numbers by Infosys. Moreover, the fact that the company has also raised its full-year guidance is likely to a have major positive impact on the technology sector.Resistance for the index may be around 12,415-12,450 levels, while the support on the downside is around 12,310-12,280 levels.If the index is able to cross 12,500, then the index may rally upto 12,850, thereby challenging its previous high of 12,671.