OMG (Object Management Group) -OCRES - Advanced - UM0-411 Set 1

Service level software always provides real-time guarantees on execution time, while application level software does not. ✘ Application level software always forms the core "building bricks" of software systems while service level software is always portable across different hardware. ✘ Application level software provides the functionality and behavior required of the system while service level software provides application-independentfunctionality. ✘ Service level software always provides the same set of operations regardless of environment, while application level software provide a consistent programminginterface. ✔

Static variables are used to save memory space in lieu of dynamic variables. ✘ Static variables have global visibility while dynamic variables are restricted to individual components. ✘ Static variables have a set value for the lifetime of the program, while dynamic variables can change value as determined by the program. ✘ Static variables exist for as long as the program runs, while dynamic variables are created and destroyed by the program and scoping rules. ✔

task laxity ✘ task deadline ✘ system mode ✘ length of a task's period ✔

abstract machines organized in layers ✘ data processed by individual statements ✘ functions operating on shared structures ✘ independent functions organized in parallel ✔

spreadsheet ✘ discrete event simulator ✘ transaction rate analyzer ✘ software configuration manager ✔

It CANNOT be determined precisely. ✘ It can be determined only for the highest priority task. ✘ It can be determined for any set of task deadlines with bounded execution times. ✘ It can be determined for any number of periodic tasks with bounded execution times. ✔

creating a predictable system architecture ✘ choosing an appropriately predictable scheduling policy ✘ defining the performance requirements for the target system ✘ defining a set of performance tests to determine that requirements will be met ✔

Different modules share standard subroutines. ✘ Leaf-functions are shared between many different modules. ✘ 'Building-brick' functions are NOT shared between modules. ✘ System branch prediction can be used to increase performance. ✔

reducing processor load variations ✘ ensuring that time constraints are met ✘ decreasing the overhead of task dispatch ✘ simplifying system maintainability when requirements change ✔

preemptive static scheduling ✘ deadline monotonic scheduling ✘ non-preemptive static scheduling ✘ priority-based preemptive dynamic scheduling ✔