B.Sc. (Computer Science) Sem 3 Principles of Operating Systems 2023-24 Question Paper - Mumbai University | munotes

Questions asked in this paper

• 2) Figures to the right indicate marks

1. Q1 Attempt the following (Any four) (20M)
   • (a) Define operating system and list the basic services provided by operating system
   • (b) Explain different typés of operations
   • (c) Describe process state diagram
   • (d) What is system call? Explain types of system call. (any two)
   • (e) Explain various multithreading models
   • (f) Explain the essential properties of
2. Q2 Attempt the following (Any four) (20M)
   • (a) Explain deadlock detection
   • (b) What is semaphore? Explain product-consumer problem
   • (c) Consider the processes which are given below in the table having arrival time is 0 and burst time is given . Calculate avg waiting time for SJF SCHEDULING
   • (d) Considering a system with five processes Po through Py and three resources of type A, B, C. Resource type A has 10 instances, B has and type C has 7 instances. Suppose at time to following snapshot of the system has been taken: What will be the content of Need Matrix? Is the system in a safe state? If yes, then what is the safe sequence?
   • (e) Give the condition necessary for a deadlock situation to
   • (f) Find the average waiting time using FCFS for the processes given in the table below Process CPU burst time(in ms) VCD/ SYCS PRINCIPLES OF OPERATING SYSTEM 75M
3. Q3 Attempt ‘he following (Any four) (20M)
   • (a) Reference string = and Memory = 3 frames. Find the number of page faults using FIFO
   • (b) Describe the term page fault. What is thrashing? How it is controlled by OS?
   • (c) Explain Different File operations
   • (d) Explain SCAN Scheduling with example
   • (e) What are the allocation methods of a disk space? Explain contiguous allocation
   • (f) What is single and two-level directory? Explain it
4. Q4 Attempt the following (Any five) (15M)
   • (a) What are the various scheduling for CPU scheduling?
   • (b) Write a short note on multicore programming?
   • (c) Write short note on 2. PAGE TABLE
   • (d) Explain DMA
   • (e) Explain Different File type
   • (f) What is first fit and worst fit

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