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"Consider a system running five I/O-bound tasks and 2 CPU-bound tasks. Assume that the I/O-bound tasks issue an I/O operation once for every millisecond of CPU computing and that each I/O operation takes 10 milliseconds to complete. Also assume that the contextswitching overhead is 0.2 millisecond and that all processes are long-running tasks. Remember that when a process requests for I/O operations, it will suspend and another process will need to be selected for execution. What is the CPU utilization for a round-robin scheduler when:
a. The time quantum is 1 millisecond b. The time quantum is 10 milliseconds"
What is the difference between a safe state and an unsafe state in a deadlock-avoidance system?
Define Critical Path and CPM. Define Networks & Network scheduling
Qqueue for service (if the server process is busy servicing another request). Requests in queue are served according to the scheduling policy in use: First-In-First-Out (FIFO) scheduling.
What (if any) relation holds between the following pairs of sets of algorithms (a) Priority and SJF (b) Multilevel feedback queues and FCFS
Remembering that there's a trade-off between memory use. Then give an example where doing so will cause throughput to suffer.
Virtual machines supported by a host operating system
You are asked to design the virtual memory system for a new operating system working on small mobile devices. The memory operates at 333 MHz with a word size of 4 bytes.
i. Deadlock avoidance ii. Deadlock prevention and iii. Deadlock detection
In different communications models, communication may take place using either "message passing" or "shared memory". Distinguish between "message passing" and "shared memory", illustrating your answer with a diagram Give three advantages of virt..
Explain the following terms in relation to linear programming problems- (1) decision variables (2) objective function
Computer has 16 pages of virtual address space but only three physical pages frames. Initially physical memory is empty. Program references virtual pages in order 1,2,3,4,5,3,4,1,6,7,8,7,8,9,7,8,9,5,4,5,4,2 Which references a page fault with LRU ..
Other user user threads belonging to the same process also be affected by the page fault (i.e., would they also have to wait for the faulting page to be brought into memory?) Explain.
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