Multiple choice technology mainframe REXX stands for. Reactive Enforcement Execution Exchange language Reactived Extendable Exchange language Restructured Extended Executor language None of the above Reveal answer Fill a bubble to check yourself C Correct answer Explanation REXX stands for Restructured Extended Executor language. It is a programming language developed by IBM that was designed to be easy to learn and use, particularly for scripting and automation tasks on IBM mainframes and other platforms.