OCR A level Scheduling Algorithms

What is the purpose of scheduling in an operating system?

• To favor long jobs over short jobs

• To provide security to the computer system

• To maximize the use of the whole computer system

• To prevent the system from failing if it is becoming overloaded

Which scheduling algorithm favors short jobs even more than Shortest Job First?

• Multi-level feedback queues

• Round Robin

• Shortest time remaining

• First come first served

What is the purpose of a pre-emptive scheduler in operating system scheduling?

• To decide that the job running should be made to stop to make way for another job

• To make sure the processor time is used efficiently

• To prevent the system from failing if it is becoming overloaded

• To favor long jobs over short jobs

Which scheduling algorithm allows each job to be given a set amount of processor time?

• Shortest time remaining

• Shortest job first

• Round Robin

• First come first served

What is the purpose of the multi-level feedback queues scheduling algorithm?

• To maximize the use of the whole computer system

• To prevent the system from failing if it is becoming overloaded

• To make sure jobs are not spending too much time monopolizing the processor

• To ensure all jobs are processed fairly

What is the core software that allows the computer to run and manages hardware, user interface, software, and provides security?

• Operating system

• Interrupt

• Processor

• Scheduling

Which scheduling algorithm puts the first job to enter the ready queue as the first to enter the running state?

• First come first served

• Shortest job first

• Shortest time remaining

• Round Robin

What is the purpose of an interrupt in an operating system?

• To maximize the use of the whole computer system

• To provide security to the computer system

• To manage hardware, user interface, and software

• To tell the CPU to stop what it is doing and do something else instead

Which scheduling algorithm sorts jobs in the ready queue in ascending order of time expected to be needed by each job?

• Multi-level feedback queues

• Shortest time remaining

• Shortest job first

• Round Robin

What is the purpose of a non-pre-emptive scheduler in operating system scheduling?

• To leave a job in the running state until it does not need to run anymore

• To favor long jobs over short jobs

• To prevent the system from failing if it is becoming overloaded

• To make sure the processor time is used efficiently