( operating systems)

Q: What is the difference among program, process, thread? Q: what is the objective of process scheduling? Q: Define Schedulers? What is their main task? Q: How many types of schedulers there are? List them with brief explanation Q: compare among the types of Schedulers Q: Define Job queue, Ready queue, Device queues. Q: Draw Queueing diagram represents queues, resources, flows Q: What does control the degree of multiprogramming? Q: What is the difference between foreground process and background processes? Where and why it was used? Q: what is context switch