Exercise #1 [25 pts-10 pts] Consider an OS that schedules jobs with a single Round-Robin queue. The context-switching overhead is o 0.1ms. We represent the execution timeline of a job mix on this system by indicating 1ms of computation for a job via an uppercase letter (we assume that the time quantum and the CPU bursts are integral numbers of ms). For example, the following string: AAAoBoCoAAoDDD means that job A executes for 3ms, then job B for 1ms, then job C for 1ms, then job A again for 2ms, then job D for 3ms, with appropriate context-switches in between. This example execution lasts 10ms+4x0.1ms 10.4ms (10ms of actual job execution, 4ms of context-switch overhead) Question #1 [15pts]: Consider the following execution: AAAAAoBBoCoDODDDOAAAAAoCoDDODDoAAAoCoDDDDDOAAAAAoBBB Answer the following questions: [q1] Knowing that there is at least one CPU-bound job in this mix, could the time quantum be 6ms? Why? [q2] Which job seems to have the longest I/O burst? Why? [q3] Knowing that one of this jobs is a text editor, which job do you think it is? Why? Exercise #1 [25 pts-10 pts] Consider an OS that schedules jobs with a single Round-Robin queue. The context-switching overhead is o 0.1ms. We represent the execution timeline of a job mix on this system by indicating 1ms of computation for a job via an uppercase letter (we assume that the time quantum and the CPU bursts are integral numbers of ms). For example, the following string: AAAoBoCoAAoDDD means that job A executes for 3ms, then job B for 1ms, then job C for 1ms, then job A again for 2ms, then job D for 3ms, with appropriate context-switches in between. This example execution lasts 10ms+4x0.1ms 10.4ms (10ms of actual job execution, 4ms of context-switch overhead) Question #1 [15pts]: Consider the following execution: AAAAAoBBoCoDODDDOAAAAAoCoDDODDoAAAoCoDDDDDOAAAAAoBBB Answer the following questions: [q1] Knowing that there is at least one CPU-bound job in this mix, could the time quantum be 6ms? Why? [q2] Which job seems to have the longest I/O burst? Why? [q3] Knowing that one of this jobs is a text editor, which job do you think it is? Why