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Define memory management
In multiprogramming system the user part of memory should be further subdivided to accommodate multiple processes. The task of subdivision is carried out enthusiastically by the Operating systems and it is known as memory management. Efficient memory management is vital in multiprogramming system. If merely a few processor in memory, afterward for much of time all of the processor will be waiting I/O and the processor will be idle. Thus memory requires to be allocated efficiently to pack as much process in to memory as possible. Memory management de-allocates and allocates memory for every process as apart of operating system and keeps track of memory. Memory management as well selects the memory to be allocated.
What are the three main activities of an operating system in regard to memory management? Keep track of which parts of memory are now being used and by whom. Decide which pr
Linked allocation With linked allocation, every file is a linked list of disk blocks; the disk blocks might be scattered anywhere on the disk. The directory has a pointer to th
What is turnaround time? Turnaround time is the interval from the time of submission to the time of completion of a process. It is the sum of the periods exhausted waiting to g
Message passing system:- The function of message system is to permit processes to communicate with one another without the requirement to resort (option) to shared data. Commun
Problem 1: (a) What are the likely benefits which an organisation may derive from the planning process? (b) Explain the main reasons why an organisation may fail to plan.
What is sector sparing? Low-level formatting also sets aside extra sectors not visible to the operating system. The controller can be told to change each bad sector logically w
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Q. We have stressed the require for an operating system to make efficient use of the computing hardware. When is it suitable for the operating system to forsake this principle and
An operating system provides the environment within that programs are executed. Internally operating systems differ greatly in their makeup because they are organized along many di
List three ways of allocating storage, and give advantages of each. a. Contiguous allocation. Fastest, if no changes are to be made. Also simplest for random access files. b
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