It is when one currency is temporarily exchanged for another, then the currency is held and exchanged later after a fixed period of time. To calculate the swap take the interest rate differential between the two underlying currencies, thus it may be used for speculative purposes to exploit anticipated movement in the interest rates.
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Provides access to a set of shared resources. A resource manager participates in transactions that are externally controlled and coordinated by a transaction manager. A resource manager typically is in a different address space or on a different machine from the clients that access it. Note: An enterprise information system is referred to as a resource manager when it is mentioned in the context of resource and transaction management.
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The phase that identifies an efficient execution plan for evaluating a query that has the least estimated cost is referred to as query optimization.
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The window of the working set of a process is the total number in which the process had referred the set of pages in the working set of the process.
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Page fault is referred to the situation when the process addresses a page in the working set of the process but the process fails to locate the page in the working set. And on a page fault the kernel updates the working set by reading the page from the secondary device.
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The set of pages that are referred by the process in the last 'n', references, where 'n' is called the window of the working set of the process.
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Zombie process: They do not take any up physical memory.Processes locked in memories that are updating the region of the process.Kernel swaps only the sleeping processes rather than the 'ready-to-run' processes, and as they have the higher probability of being scheduled than the Sleeping processes.
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