Job queue, ready queue, and device queue are the three queues of process scheduling.

Six types of process scheduling algorithms are: First Come First Serve (FCFS), 2) Shortest-Job-First (SJF) Scheduling, 3) Shortest Remaining Time, 4) Priority Scheduling, 5) Round Robin Scheduling, 6) Multilevel Queue Scheduling.

What are Scheduling Queues? The Job Queue stores all processes that are entered into the system. The Ready Queue holds processes in the ready state. Device Queues hold processes that are waiting for any device to become available. For each I/O device, there are separate device queues.

Operating systems may feature up to three distinct scheduler types: a long-term scheduler (also known as an admission scheduler or high-level scheduler), a mid-term or medium-term scheduler, and a short-term scheduler. The names suggest the relative frequency with which their functions are performed.

Job scheduling is one application of queues, as explained on this page. A queue is natural data structure for a system serving incoming requests. Most of the process scheduling or disk scheduling algorithms in operating systems use queues.

There are two categories of scheduling: Non-preemptive: Here the resource can't be taken from a process until the process completes execution. ... Preemptive: Here the OS allocates the resources to a process for a fixed amount of time.

The three schedule types are known as the Capacity schedule, Resource schedule, and Service schedule. In some ways, they overlap in what they can do, and for some applications more than one will work.