Oil-and-gas giants Exxon Mobil Corp XOM.N and Chevron Corp CVX.Nblew past quarterly profit expectations, boosted by surging energy costs. By Amruta Khandekar and Shreyashi Sanyal Oct 28 (Reuters) - Wall Street indexes jumped on Friday, buoyed by upbeat results from Apple, with investors hoping that some signs of economic weakness would lead to the U.S. Federal Reserve slowing down the pace of its interest rate hikes soon. Data showed U.S. consumer spending rose more than expected in September, but private industry wage growth slowed considerably in the third quarter and underlying inflation still remained high.