Microsoft and Cisco continually test and update the all certifications. Juniper JN0-570 JNCIS-SSL and JN0-541 IDP Associate certification credentials are the best and have the same popularity as PMI-001 and Cisco 642-975 DCASI exam have. Oracle 1z0-048 Oracle Database 10g R2: Administering RAC is a most popular exam among the IT professionals.