Journal of Information & Systems Management S. Karthik, D. Satish Kumar 7 4 2017 http://www.dline.info/jism/fulltext/v7n4/jismv7n4_3.pdf A wireless sensor network consists of a collection of hundreds or thousands of sensor nodes/ relay nodes with sensing, transmitting module. These sensor nodes execute tasks that were assigned to them in a hostile environment. The security feature along with the ad-hoc nature, irregular connectivity, and resource limitations of relay network result in a number of design challenges. There is currently enormous research potential in the area of WSN. In this paper we present a brief survey of Cluster based energy efficient and fault tolerant n- coverage in WSNs. First we outline the energy efficient and fault tolerant with their corresponding countermeasures in WSNs. Then we present a holistic view of cluster based energy, fault tolerant, coverage conservation and security issues in WSN. Also we highlight the various security and coverage issues in WSN.We have also pointed out the research areas in Cluster based energy efficient and fault tolerant n- coverage in WSNs.