STUPIDSID
1 (a)
What is OS? What are the common tasks performed by OS and when they are performed?
7 M
1 (b)
Explain turn around time in batch processing system.
6 M
1 (c)
Define distribution system. Give the key concepts and techniques used in distributed O.S.
7 M
2 (a)
Explain with basic structure used for system generation in configuring and installing supervisor.
7 M
2 (b)
Explain with a figure the working of a two layered O.S. structure.
6 M
2 (c)
With a neat diagram, explain the working of a micro kernel based O.S.
7 M
3 (a)
Define a process. List the different fields of a process control blocks.
6 M
3 (b)
Explain the four fundamental states of process with state transition diagram.
7 M
3 (c)
What are the advantages of threads over process? Explain kernel level threads.
7 M
4 (a)
Explain the working of a buddy system allocator.
6 M
4 (b)
Give the comparison of contiguous and non-contiguous memory allocation.
6 M
4 (c)
Explain first fit and best fit technique used to perform a fresh allocation from a free list.
8 M
5 (a)
Explain what are the functions performed by paging hardware.
6 M
5 (b)
What are the functions performed by VM handler? Give the data structure of VM handler.
6 M
5 (c)
Consider the page reference string 5,4,3,2,1,43,5,4,3,2,1,5. How many page faults would occur for the following page replacement policies assuming 3 frames?
(i) FIFO (ii) LRU
(i) FIFO (ii) LRU
8 M
6 (a)
What are the facilities provided by the file system and the input-output control system?
6 M
6 (b)
With a figure explain the working of a linked allocation of disk space.
7 M
6 (c)
Explain the interface between file system and IOCS.
7 M
7 (a)
With diagram explain the working of a long, medium and short term scheduling in a time sharing system.
10 M
7 (b)
For the following given process for scheduling.
Calculate mean turn around time and mean weighted turn around for the (i) FCFS scheduling (ii) Round-Robin scheduling with time slicing (?) for I second.
| Processes | P1 | P2 | P3 | P4 | P5 |
| Arrival time | 0 | 2 | 3 | 4 | 8 |
| Service time | 3 | 3 | 5 | 2 | 3 |
Calculate mean turn around time and mean weighted turn around for the (i) FCFS scheduling (ii) Round-Robin scheduling with time slicing (?) for I second.
10 M
8 (a)
Explain the primary issues in implementing message passing.
6 M
8 (b)
Explain the working of a blocking and non-blocking delivery protocols.
7 M
8 (c)
Explain mailboxes. Give the advantages of mailboxes.
7 M
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