Exam 4: Processor Management

A single processor can be shared by several jobs, or several processes, but if, and only if, the operating system has a scheduling policy, as well as a scheduling algorithm, to determine when to stop working on one job and proceed to another.

When the operating system detects a nonrecoverable error, the following step ____, is performed first by the interrupt handler.

If one job monopolizes the system, the extent of its overall effect on system performance depends on the scheduling policy and whether the job is CPU-bound or I/O-bound.

Assume that four jobs A-D require the CPU cycles listed below. Using the SJN algorithm, the average turnaround time is ____. Job: A B C D CPU cycle: 5 2 6 4

Assume jobs A-D arrive in quick succession in the READY queue. Using round robin scheduling, the turnaround time for job C is ____. Arrival time: 0 1 2 3 Job: A B C D CPU cycle: 8 4 9 5

The first-come, first-served (FCFS) algorithm is fine for most ____ systems.

A program is an active entity that requires a set of resources, including a processor and special registers, to perform its function.

The Process Scheduler assigns the CPU to execute the processes of those jobs placed on the ____ queue by the Job Scheduler.

A ____ is a portion of a process that can run independently.

Internal interrupts, or ____ interrupts, also occur as a direct result of the arithmetic operation or job instruction currently being processed.