Answer :
Operating systems that support preemptive tasking include Windows NT, 2000, XP, Vista, and Windows 98/98SE versions. DOS and PC-DOS do not have such capabilities. Preemptive tasking allows for efficient CPU usage and multitasking.
The question asks about which operating systems support preemptive tasking. Preemptive tasking is a multiprocessing mode where the operating system kernel can interrupt a running task to schedule a different task to run, ensuring efficient use of CPU time and better multitasking. Notable operating systems that offer preemptive multitasking include:
- Windows NT
- Windows 2000
- Windows XP
- Windows Vista
- Windows 98 and 98SE
- Windows 95 (versions 95A, 95B, 95C)
Out of the provided options, 2), 3), and 4) have preemptive tasking capabilities. Early versions of Windows, like Windows 3.x, used cooperative multitasking and do not fall under preemptive multitasking, unlike later releases such as Windows 95 onwards. However, DOS and PC-DOS (option 1)) are not known to support preemptive multitasking as their design is based on a single-user and single-tasking system.
