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What are the main advantages of the microkernel approach to system design?
Benefits typically contain the following
(a) Adding a new service does not require modifying the kernel,
(b) It is more secure as more operations are done in user mode than in kernel mode, and
(c) An simpler kernel design and functionality typically results in a more reliable operating system.
Internal file structure All disk I/O is performed in units of single block, and all blocks are the similar size. It is unlikely that the physical record size will exactly match
When do we write a page from physical memory back to the disk? In general, caches have two broad types of writing policies. One approach is a write-through cache. In this case,
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
FIFO page replacement This is the easiest page replacement algorithm. At this juncture the 1 st page entering is the 1 st to leave that is the oldest page leaves. To execute
Q. Give the reasons why Windows XP, Solaris and Linux implement multiple locking mechanisms. Explain the circumstances under which they use mutexes, spinlocks, semaphores, adaptiv
Ask question #Minimuexplain the programable clock modes in a computer system m 100 words accepted#
What are the use of job queues, ready queues and device queues? As a process enters a system they are put in to a job queue. These queues having of all jobs in the system. The
What advantages are there to this two-level directory? Users are isolated from each other. Users have more freedom in choosing file names.
what is interval timer
FIXED PARTITIONING In a fixed partitioning, the operating system inhabiting some fixed portion of main memory is available for use of multiple processes -Using fixed partit
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