• Attempt any five questions.
• All questions carry equal marks.
Define an operating system. What are the goals of an operating system? Explain.
Describe the differences among short term, medium term and long term scheduling.
What is meant by system call? How it can be used. How does an application program use these call during execution?
Define Process States. Draw the diagram of PCB.
Disk drive with 200 cylinders (0-199), work queue: 23,89,132,42,187. Determine total distance for SCAN and LOOK.
List the advantages and disadvantages of Magnetic Tape memory.
Explain in detail about various ways of free space management.
What is the difference between threads and process.
Explain paging and segmentation. How are they helpful in removing fragmentation?
What is deadlock prevention? A computer has six tape drives, each process needs two. For which values of n is the system deadlock free?
Explain mutual exclusion with suitable example.
Discuss Reader-Writers solution using Monitors.
Explain file system used in Linux and Windows.
What is a file? Briefly explain different directory structures. What kind of directory structure is used in UNIX?
Write short notes on: a) Concurrent Programming b) Virus c) Remote Procedure Call (RPC) d) Time Sharing.
