CACS251 Operating System
Operating System: most repeated questions
Questions that have come up in more than one paper, matched by what they ask rather than exact wording. Most repeated first.
- 4×Asked in 2026, 2023, 2021, 2020What are seek time and disk access time? Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. The drive is currently serving a request at cylinder 2,150, and the previous request was at cylinder 1,805. The queue of pending requests, in FIFO…Answer coming10
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- What are seek time and disk access time? Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. The drive is currently serving a request at cylinder 2,150, and the previous request was…TU Board 2026
- What is Disk Access Time and Disk Response Time? Suppose that a disk has 200 cylinders, numbered (0 199). The drive is currently serving a request at cylinder 43/and previous request was at cylinder…TU Board 2023
- Suppose that a disk has 200 cylinders (0 200). The head pointer is currently at 50 and previously at 35. The queue of pending request, in FIFO order is: 60, 190, 40, 125, 15, and 150. The time…TU Board 2021
- Define the term seek time and rotational delay in disk scheduling. Suppose that a disk has 100 cylinders, numbered 0 to 99. The drive is currently serving a request at cylinder 43 and previous…TU Board 2020
- 3×Asked in 2024, 2023, 2020Define kernel. Explain different types of kernel in operating system.Answer coming5
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- 3×Asked in 2023, 2021, 2020The processes are assumed to have arrived in the order p1, p2, p3, p4, p5 all at time 0. Draw a Gantt chart illustrating their execution and calculate average waiting time and turnaround time for the process given below using: a) First Come First Serve b)…Answer coming10
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- The processes are assumed to have arrived in the order p1, p2, p3, p4, p5 all at time 0. Draw a Gantt chart illustrating their execution and calculate average waiting time and turnaround time for…TU Board 2023
- What is CPU scheduling? Write down the criteria for CPU scheduling? Consider the following set of processes, with the length of the CPU burst given in milliseconds, draw Gantt chart illustrating…TU Board 2021
- Write CPU scheduling criteria. For the processes listed in following table, draw Gantt chart illustrating their execution and calculate average waiting time and turnaround time using: a) First Come…TU Board 2020
- 2×Asked in 2024, 2022What is use of DMA controller? Consider the following process and answer the following questions.ProcessAllocationMaxAvailable[A,B,C,D][A,B,C,D][A,B,C,D]P00 0 1 10 0 1 21 5 2 0P11 0 0 01 7 5 0P21 3 5 42 3 5 6P30 6 3 20 6 5 2P40 0 1 40 6 5 6a) What is the…Answer coming10
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- What is use of DMA controller? Consider the following process and answer the following questions.ProcessAllocationMaxAvailable[A,B,C,D][A,B,C,D][A,B,C,D]P00 0 1 10 0 1 21 5 2 0P11 0 0 01 7 5 0P21 3…TU Board 2024
- Consider the following System:ProcessAllocationMaxAvailable[A,B,C,D][A,B,C,D][A,B,C,D]P00 0 1 10 0 1 21 5 2 0P11 0 0 01 7 5 0P21 3 5 42 3 5 6P30 6 3 20 6 5 2P40 0 1 40 6 5 6Answer the following…TU Board 2022
- 2×Asked in 2026, 2024What is segmentation? How can it be used for the memory management? [1+4]Answer coming5
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- 2×Asked in 2026, 2024List some security problems in operating system. Explain the role of clock synchronization in distributed system. [2+3]Answer coming5
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- 2×Asked in 2022, 2020What is clock synchronization? Explain how physical clock is synchronized by Cristian algorithm and logical clock is synchronized by Lamport's algorithm with suitable example.Answer coming10
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- What is clock synchronization? Explain how physical clock is synchronized by Cristian algorithm and logical clock is synchronized by Lamport's algorithm with suitable example.TU Board 2022
- What is clock synchronization? Explain how physical clock synchronize by Berkeley algorithm and logical clock synchronize by Lamport's algorithm with suitable example.TU Board 2020