To obtain RHCE certification, candidates can only take the RHCE if they have passed the RHCSA first.2. To take the RHCA exam, candidates must have obtained the Red Hat Certified Engineer (RHCE) certificate. The Red Hat RHCE certification exam refers to the Red Hat certification exam based on troubleshooting and system maintenance as well as installation and configuration and other practical abilities, mainly examining the candidates' practical abilities in the field system.