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 .