Operating Systems Questions

• Explain fork() system call?
• How can you get/set an environment variable from a program?
• A Map is an Array,which contains the addresses of the free space in swap device that are allocatable resources,and the number of the resource unit available there.
• Which memory management technique involves dividing the memory into fixed sized blocks ?
• What is multi tasking, multi programming, multi threading?
• What are turnaround time and response time?
• Describe the Buddy system of memory allocation.
• What is time-stamping?
• How are the wait/signal operations for monitor different from those for semaphores?
• What has triggered the need for multitasking in PCs?
• What are the four layers that Windows NT have in order to achieve independence?
• What is SMP?
• What are the key object oriented concepts used by Windows NT?
• How many jobs can be run concurrently on MVT?
• What is Executive in Windows NT?
• What is an idle thread?
• What is FtDisk?
• Why paging is used?
• Explain the concept of the batched operating systems?
• What is Throughput, Turnaround time, waiting time and Response time?