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What is meant by demand paging? Explain.
Demand paging is a technique to implement virtual memory. In demand paging simply when a page is required it is brought into memory. As an alternative of swapping the whole process into memory only the required pages are brought into the memory. Therefore it will not read pages which are not used and hence results in reduced swap time and memory needed.
For distinguishing the pages in memory and those on disk a valid invalid bit is used. If the bit is valid the page is in memory moreover the page is either not in memory or is not valid. The page table entry for a page that isn't currently in the memory is marked invalid.
Q) a. Given that the first three necessary conditions for a deadlock are in place, comment on the feasibility of the following strategy. All processes are given unique priorities.
What is a general graph? A tree structure where links can go from one branch to a node earlier in the similar branch or other branch, allowing cycles.
explain any four types of operating system feature and structure(design)
Your task is to replace the round robin CPU scheduling scheme you developed in Practical 6 with a priority-based scheduling algorithm. To simplify matters, you can maintain the ori
We can view an operating system as a resource allocator. Explain. We can outlook an operating system as a resource allocator. A computer system has Many resources (software and
What are the various page replacement algorithms used for page replacement? FIFO page replacement Optimal page replacement LRU page replacement LRU approximat
What are threads? A thread - sometimes called as an implementation context or a lightweight process - is a single sequential flow of control within a program. We use threads
Question : a) Describe the difference between the authentication of a user account on a peer to peer network and a client server network. b) Compare an end user account with
What are the objectives for a file management system? To meet the data management wants and requirements of the user, which embrace storage of data and the ability to
reason for terminating a process
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