Q1. Name some events in operating system which are responsible to allocate resources and to control user programs to prevent errors.
These resources include time, power, hardware, etc... that controls the operation of the application programs to prevent errors.
Q2.Consider a well-known reputed university having thousands of students enrolled, at the end of semester each student must have a semester end report generated by computer. Each report card needs same resources to execute. Being a student of operating system, you know operating system responsibility is to schedule the job. In your perspective, which environment will be suitable for given scenario to increase CPU utilization? Support your answers with 2-3 reasons.
Ans:
FCFS is used …show more content…
There are four events that may occur where the scheduler needs to step in and make this decision:
1) The current process goes from the running to the waiting state because it issues an I/O request or some operating system request that cannot be satisfied immediately.
2) The current process terminates.
3) A timer interrupt causes the scheduler to run and decide that a process has run for its allotted interval of time and it is time to move it from the running to the ready state.
4) An I/O operation is complete for a process that requested it and the process now moves from the waiting to the ready state. The scheduler may then decide to preempt the currently-running process and move this newly-ready process into the running state.
2) Process preemption Sol: A scheduler is a preemptive scheduler if it has the ability to get invoked by an interrupt and move a process out of a running state to let another process