OPERATING SYSTEMS FOR COMPUTERS
COMPUTER OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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queue
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Batch Processing
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Device Drivers
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Multitasking
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dynamic memory allocation
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Detailed explanation-1: -In computer science, a queue is a collection of entities that are maintained in a sequence and can be modified by the addition of entities at one end of the sequence and the removal of entities from the other end of the sequence.
Detailed explanation-2: -Job queue – It contains all of the system’s processes. Ready queue – This queue maintains a list of all processes in the main memory that are ready to run. This queue is always filled with new processes. Device queue – This queue is made up of processes that are stalled owing to the lack of an I/O device.
Detailed explanation-3: -Similarly, a context switch occurs when the time slice for one process has expired and a new process is to be loaded from the ready queue. This will be instigated by a timer interrupt, which will then cause the current process’s state to be saved and the new process’s state to be restored.
Detailed explanation-4: -In the First Come First Serve method, the process which requests the CPU gets the CPU allocation first. In the Shortest Remaining time, the process will be allocated to the task closest to its completion. In Priority Scheduling, the scheduler selects the tasks to work as per the priority.