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Explain the difference between internal and external fragmentation.
Internal Fragmentation is the area in a region or a page that is not used by the job occupying that region or page. This space is unavailable for use by the system until that job is finished and the page or region is released.
factors that influences layout
Explain the Fork-join This is primitives in a higher level programming language for implementing interacting processes. The syntax is like this: fork ; join ; where
Q. Why might a system utilize interrupt-driven I/O to manage a single serial port however polling I/O to manage a front-end processor such as a terminal concentrator? A
How do we overcome the disadvantages of the two-level directory? Give links from one user directory to another, creating path names; system files become available by letting th
Present your own fully documented and tested programming example illustrating the prevention of a data race in a parallelised program. This is an example where total number of p
defination
What are the disadvantages of swapping technique used in pre-3BSD UNIX systems? If there is excessively much memory contention, processes are swapped out until sufficient
Hierarchical paging Single way is to use a two-level paging algorithm, in which the page table itself is also paged. A logical address is separated into a page number and a pag
What is the benefits OS co-operating process? Information sharing. Computation speeds up. Modularity. Convenience.
What is process control block? Every process is represented in the OS by a process control block. It has many pieces of information associated with an exact process.
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