B.Sc. (Computer Science) Sem 3 Principles of Operating Systems Oct 2025 Question Paper - Mumbai University | munotes

Questions asked in this paper

SECTION I - Q1) (Attempt any two) 10 Marks

1. A) Explain the role of an Operating System in a computer system.
   Read the model answer
2. B) List and explain any five services provided by an Operating System.
   Read the model answer
3. C) What is a Process Control Block (PCB)? What information does it contain?
   Read the model answer
4. D) Explain different multithreading models with diagrams.
   Read the model answer

SECTION II - Q2) (Attempt any two) 10 Marks

1. A) Describe the working of semaphores. Differentiate between binary and counting semaphores.
   Read the model answer
2. B) Define virtual memory. Why is it needed?
   Read the model answer
3. C) Explain demand paging and the concept of page faults.
   Read the model answer
4. D) Describe the booting process and disk formatting.
   Read the model answer

SECTION III - Q3) (Attempt any two) 10 Marks

1. A) What are the different file access methods? Give suitable examples.
   Read the model answer
2. B) Explain various file allocation methods (contiguous, linked, indexed).
   Read the model answer
3. C) How is free space managed in file systems? Explain different techniques.
   Read the model answer
4. D) What is thrashing? How can it be prevented?
   Read the model answer

Read from the scan above, so a character or two may differ. The scan is the original.