Vishal Sikka has resigned as Managing Director and CEO of Infosys. The board has accepted his resignation with immediate effect. Infosys in a notice stock exchanges said Sikka will remain with Infosys as executive vice-chairman. The position is a newly created position at Infosys. Infosys, second largest software exporter of India, has appointed chief operating officer UB Pravin Rao as interim managing director and CEO.