There is no eligibility criteria to take the pH test.
However companies which use the eLitmus pH Test scores may set their own eligibility. Typically companies which hire through eLitmus look for candidates from BE/B.Tech, MCA, ME/Mtech or M.Sc (CS/IT/Electronics). Additionally they may ask for minimum marks or grades. The criteria is published with each job ad .
Complete listing of job ads and the corresponding eligibility criteria can be seen at
www.elitmus.com/jobs