  During 2010 the LHC delivered pp collisions with a centre-of-mass energy of 7
TeV. In this paper, the results of comprehensive studies of missing transverse
energy as measured by the CMS detector are presented. The results cover the
measurements of the scale and resolution for missing transverse energy, and the
effects of multiple pp interactions within the same bunch crossings on the
scale and resolution. Anomalous measurements of missing transverse energy are
studied, and algorithms for their identification are described. The
performances of several reconstruction algorithms for calculating missing
transverse energy are compared. An algorithm, called missing-transverse-energy
significance, which estimates the compatibility of the reconstructed missing
transverse energy with zero, is described, and its performance is demonstrated.
