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The most direct way to probe the strength of an electric field, is to measure the force that\nexerts to a charged particle. For a time varying field, charge placement within an interval\nsubstantially shorter than the characteristic period of variation of the field is essential for\nsampling its temporal evolution. Employing such a scheme to track the field variation\nof light waves that changes its direction 1015 times per second, charge release shall be\nconfined within a fraction of a femtosecond.\nIn this thesis, the complete characterization of a light pulse is demonstrated experimentally\nfor the first time by probing its field variation using a 250 attosecond electron\nburst. Such an ultrafast charge probe, can be generated by the impulsive ionization of\natoms, using an XUV attosecond pulse precisely synchronized with the light waveform to\nbe characterized. The technique allows access to the instantaneous value of the electric\nfield of IR, visible, or UV light and thereby opens the door for the synthesis of controlled,\nextremely broadband and arbitrarily shaped light waveforms.\nThe above experiments, are presented along with critical pertinent developments on the\ngeneration of few-cycle phase-controlled light waveforms and their subsequent exploitation,\nfor the generation of isolated XUV attosecond pulses.\nPrecisely characterized and controlled light fields and XUV attosecond pulses employed\nin combination, hold the promise for probe and control of elementary processes evolving\non an attosecond time scale.