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what is turnaround timeturnaround time is the interval from the time of submission to the time of completion of a process it is the sum of the
define throughput throughput in cpu scheduling is the number of processes that are completed per unit time for long processes this rate might be
what is preemptive and nonpreemptive schedulingunder nonpreemptive scheduling once the cpu has been allocated to a process the process keeps the cpu
define cpu schedulingcpu scheduling is the method of switching the cpu among various processes cpu scheduling is the basis of multiprogrammed
what are the different ways in which a thread can be cancelled cancellation of a target thread may occur in two different scenariosasynchronous
define thread cancellation amp target thread the thread cancellation is the task of terminating a thread before it has done a thread that is to
what is the use of fork and exec system calls fork is a system call by which a new process is formed exec is also a system call which is used
what are the kernel threadskernel threads are supported directly by the operating system thread creation scheduling and management are done by the
what are user threads user threads are supported above the kernel and are executed by a thread library at the user level thread creation amp
what is a threada thread otherwise called a lightweight process lwp is a basic unit of cpu utilization it comprises of a thread id a program counter
what is the use of inter process communicationinter process communication gives a mechanism to allow the co-operating process to communicate with
what is co-operative processa process is co-operating if it can affect or be affected by the other processes implementing in the system any process
what is independent processa process is independent it cannot affect or be affected by the other processes implementing in the system any process
what is meant by context switch switching the cpu to another process requires saving the state of the old process and loading the saved state for
what are the use of job queues ready queues and device queuesas a process enters a system they are put in to a job queue these queues having of all
what is schedulers a process migrates between the various scheduling queues throughout its life time the os must select processes from these
what is process control block each process is shown in the os by a process control block it having many pieces of information associated with a
what do you mean by system callssystem calls give the interface among a process and the operating system when a system call is executed it is treated
what are privileged instructions some of the machine instructions that might cause harm to a system are designated as privileged instructions the
what is real time systema real time system has well explained fixed time constraints processing must be done within the explained constraints or the
what is graceful degradationin multiprocessor systems failure of one processor will not halt the system but only slow it down by sharing the work of
what are batch systems batch systems are quite appropriate for implementing large jobs that need little interaction the user can submit jobs and
what is the kernel a more common definition is that the os is the one program running at all times on the computer
what is an operating system an operating system is a program that handles the computer hardware it acts as an intermediate among users of a
what is delegationdelegation gives a proper mechanism to achieve the desired code reuse the method is caught in the desired class and forwarded to