Targeting database administrators and application developers, the IBM C2090-558 certification validates technical proficiency in managing Informix 11.70 environments. Candidates must demonstrate command over server architecture, instance configuration, and physical storage management, including dbspaces, chunks, and page structures. Assessment scope encompasses high availability configurations such as High-Availability Data Replication, Remote Standby, and Shared Disk Secondary nodes. Furthermore, the exam evaluates competence in SQL development, transaction logging, concurrency control, and index optimization strategies. Technical mastery requires expertise in performing logical and physical backups via ontape and onbar utilities, alongside comprehensive monitoring of system performance metrics through Informix utilities and standard administrative interfaces.