Multiple choice questions.

27. To obtain better memory utilization, dynamic loading is used. With dynamic loading, a routine is not loaded until it is called. For implementing dynamic loading a. Special support from operating system is essential. b. Special support from hardware is required. c. User programs can implement dynamic loading without any special support from hardware or operating system. d. Special support from both hardware and operating system is essential. 28. The presents a uniform device-access interface to the 1/0 subsystem, much as system calls provide a standard interface between the application and the operating system. Device drivers. b. I/O systems. c. Devices. d. Buses. a. 29. In real time operating system ? a. Process scheduling can be done only once. b. All processes have the same priority. c. Kernel is not required. d. A task must be serviced by its deadline period 30. The priority of a process will if the scheduler assigns it a static priority. 5