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CPU protection
In addition to protecting input/output and memory, we must ensure that the operating system maintains control. We must prevent the user program from falling into infinity ACC311 MIDTERM SOLVED PAPERS. Also see and apply for scholarships Fulbright Scholarship 2023 | Application Process (Fully Funded)

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ACC311 MIDTERM SOLVED PAPERS

ACC311 MIDTERM SOLVED PAPERS
ACC311 MIDTERM SOLVED PAPERS

Do not duplicate or connect to system services and never relinquish control to the CPU. Until To do this, we can use a timer, which stops the CPU after a certain period of time Make sure the operating system maintains control. The timer period can be variable or installed. ACC311 MIDTERM SOLVED PAPERS. A fixed speed clock and counter are used to implement a variable timer. The operating system initializes the counter with a positive value. The counter decreases with each tap of the clock by the timer interrupt service routine.

When the counter reaches 0, there is a time delay generates an interrupt that passes control of the current process to the next Procedure. For example, we can use the timer to prevent a program from running for too long. In which in the simplest case the timer can be set to pause every N milliseconds.

where N is the time slice that each process is allowed to run before the next process takes control of the CPU. The operating system is called at the end of each time slice to: Various household chores. This issue is detailed in the CPU scheduler.

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Another use of using a timer to calculate the current time. Temporary interruption means: A time has passed for the operating system to calculate the current time by referring to Any start time. The charge timer is a separate command. Operating system components An operating system consists of many components that manage all the resources of a computer.

ACC311 MIDTERM SOLVED PAPERS

ACC311 MIDTERM SOLVED PAPERS
ACC311 MIDTERM SOLVED PAPERS

A system that ensures the proper execution of programs. Explain these materials briefly This section. operation management This process can be considered as an ongoing program. Requires special resources, Including CPU time, memory, files and I / O devices to do your job.

Employment This system is responsible for: Create and terminate user and system processes  Suspension and resumption of operations Provide mechanisms for process synchronization Provide mechanisms for the communication process Provide mechanisms for overcoming deadlocks Main memory management
Primary memory is a large set of words or bytes (called memory locations) that are expanded.

ACC311 MIDTERM SOLVED PAPERS
ACC311 MIDTERM SOLVED PAPERS

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