STUPIDSID
1 (a)
Explain basic services provided by Operating System on bare Hardware machine.
7 M
1 (b)
What is Virtual Machine? Explain virtual machine & Client/Server architecture of Operating System.
7 M
2 (a)
What is the average waiting time & average Turn around times of all process for FCS, SJF, non-preemptive Priority and Round(Quantum=1) scheduling:
(Assume small number implies higher priority & All 5 process have arrived in order P1,P2,P3,P4,P5 all at time=0).
| Process | Burst Time | Priority |
| P1 | 8 | 5 |
| P2 | 1 | 1 |
| P3 | 3 | 2 |
| P4 | 2 | 4 |
| P5 | 5 | 3 |
(Assume small number implies higher priority & All 5 process have arrived in order P1,P2,P3,P4,P5 all at time=0).
7 M
2 (b)
What is Process? Explain Process state Transition Diagram in detail.
7 M
2 (c)
What is System Call in OS? Explain fork() system call to create new process in UNIX OS.
7 M
3 (a)
What is IPC? Explain the use of Semaphore to solve Producer-Consumer problem.
7 M
3 (b)
Consider the following page reference string
0,1,7,2,3,2,7,1,0,3. How many page fault occur with four page frames and eight pages and the four frames are initially empty in case of FIFO & LRU.
0,1,7,2,3,2,7,1,0,3. How many page fault occur with four page frames and eight pages and the four frames are initially empty in case of FIFO & LRU.
7 M
3 (c)
What is Monitor in IPC? Solve the Bounded buffer problem using Monitor.
7 M
3 (d)
What is a Deadlock? Describe the conditions that lead to deadlock. How to recover from Deadlock?
7 M
4 (a)
Explain virtual memory management with Paging in detail.
7 M
4 (b)
Explain Banker's Algorithm to avoid deadlock with multiple resources.
7 M
4 (c)
Explain following commands in UNIX
1. chmod 2. grep 3. head & tail 4. cut.
1. chmod 2. grep 3. head & tail 4. cut.
7 M
4 (d)
Explain How DMA (Direct Memory Access) works.
7 M
5 (a)
Explain linked list allocation file implementation technique.
7 M
5 (b)
Discuss various security threats in File System of OS.
7 M
5 (c)
Compare various Disk Arm Scheduling Algorithms.
7 M
5 (d)
Compare Windows & Unix family Operating System.
7 M
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