  Many of the interesting physics processes to be measured at the LHC have a
signature involving one or more isolated electrons. The electron reconstruction
and identification efficiencies of the ATLAS detector at the LHC have been
evaluated using proton-proton collision data collected in 2011 at sqrt(s) = 7
TeV and corresponding to an integrated luminosity of 4.7/fb. Tag-and-probe
methods using events with leptonic decays of W and Z bosons and J/psi mesons
are employed to benchmark these performance parameters. The combination of all
measurements results in identification efficiencies determined with an accuracy
at the few per mil level for electron transverse energy greater than 30 GeV.
