The Reserve Bank has maintained status quo on interest rates for the eighth consecutive time, while asserting that the rates will remain unchanged "as long as necessary to revive growth." The repo rate - the rate at which the central bank lends short-term money to banks - is unchanged at 4 per cent and the reverse repo rate is the same at 3.35 per cent, the RBI Governor Shaktikanta Das said at the end of the bi-monthly Monetary Policy Committee (MPC) review meeting that started on Wednesday.