  There are 15 cataclysmic variables (CVs) observed in the first two campaigns
of the K2 mission. In this paper, the eight CVs showing distinct features are
analyzed in detail. Among these eight, modulations during quiescence are
evident at the known orbital periods in the SU UMa stars QZ Vir and RZ Leo, and
at our newly determined orbital periods of 1RXS J0632+2536 and WD 1144+011. The
periodogram analysis for the quiescent light curve of QZ Vir reveals
multi-period modulations and the coexistence of orbital and superhump periods.
The phased orbital light curves for the other 3 CVs in quiescence display wide
(about half cycle) and shallow (< 0.5 mag) eclipse features. Besides these
modulations, their quiescent light curves reveal several transient events: a
sudden decrease of system light in 1RXS J0632+2536, a low level flare-like
event in QZ Vir, a short brightening event in RZ Leo and a temporary
disappearance of the orbital modulation in WD 1144+011. The two known dwarf
novae UV Gem and TW Vir and the CVs USNO-B1.01144-00115322 and
CSS130516:111236.7+002807 show outbursts, including 1 complete and 3 incomplete
normal outbursts and 2 complete superoutbursts. An incomplete but typical
normal outburst confirms the dwarf nova identification of the
USNO-B1.01144-00115322. The one complete normal outburst in UV Gem possibly
provides the orbital period, since its modulations are shorter than the
previously observed superhump period. The superoutbursts of TW Vir and
CSS130516:111236.7+002807, along with their corresponding superhump periods,
indicate that both objects are SU UMa stars. The derived superhump period of
CSS130516:111236.7+002807 is 1.44 hr, implying that this new SU UMa star is
close to the period minimum.
