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Multi Tasking Environment
Multi tasking exploits parallelism by:
1) Concurrently using the multiple functional units
2) Pipelining functional units are pipe line together
3) Overlapping CPU and I/O activities.
In multitasking environment, there should be a proper mix among task and data structures of a job, in order to make sure their proper parallel implementation.
In multitasking, the useful code of a programme can be use again. The property of allowing one copy of a programme module to be used by more than task in parallel is known as reentrancy. Non-reentrant code can be used only once throughout lifetime of the programme. The reentrant codes, which may be called many times by dissimilar tasks, are assigned with local variables.
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