RHCA is Red Hat's top level certification for senior technical professionals responsible for planning and deploying large-scale enterprise environments.
Those who earn RHCA have demonstrated a high level of proficiency using Red Hat Enterprise Linux and other open source infrastructure tools from Red Hat to build scalable, reliable, and manageable systems for enterprise environments.
Red Hat Certified Engineer (RHCE) is a performance-based test that measures actual competency on live systems.
Called the "crown jewel of Linux certifications," RHCE proves an individual's ability to configure networking services and security on servers running a Red Hat Enterprise Linux OS.
Red Hat Certified Technician (RHCT) is the first step in establishing Linux credentials and is an ideal certification for those transitioning from non-UNIX/Linux environments.
The Sun Certified Programmer for Java Platform, Standard Edition 6 certification exam is for programmers experienced using the Java programming language.
Achieving this certification provides clear evidence that a programmer can create Java technology applications.

