MED ICT ICTED 518 Operating System 2079 (new Course)

TRIBHUVAN UNIVERSITY 2079 (New Course) Master/Education/1th Semester ICT.Ed.518 Operating System Full Marks: 40 Time: 3 hrs. Candidates are required to give answers in their own words as far as practicable. The figures in the margin indicate full marks.

Attempt all question

Group "B"

6 X 5 marks =30

1. What is a distributed operating system? Differentiate between time sharing and real time operating system.

2. What are the segmentation and paging? Why they are combined into one scheme?

3. Describe the goal of I/O software? What are the functions of Interrupt Handler? Explain.

4. A disk queue has the following request to read tracks: 87, 170, 4, 57, 173, 32, 67 and 183. If disk head is initially at cylinder 90 and there are total 200 tracks then calculate total head movement using C-SCAN and C-LOOK algorithm.

OR

State the conditions necessary for deadlock exist. Give reason, all conditions are necessary.

5. Define the term race condition. Differentiate between race conditions and critical regions.

6. Given references to the following pages by a program, 1, 2, 3, 4, 2, 1, 5, 6, 2, 1, 2, 3, 7, 6, 3, 2, 1, 2, 3, 6. How many page faults will occur if the program has here page frames available to it and uses FIFO replacement?

OR

What is virtual memory? Explain FIFO replacement algorithm.

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