PTU BCA Last 10 Years 2011-2021 Previous Question Papers
BCA (2014 to 2018) (Sem.—4)
OPERATING SYSTEMS
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Subject Code : BSBC-403
M.Code : 10068
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains SIX questions carrying TEN marks each and students have to attempt any FOUR questions.
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SECTION-A
Write briefly :
- Differentiate between application programs and system programs.
- What are Threads? What are its applications?
- What is Context Switching?
- What is CPU - I/O Burst Cycle?
- What is the difference between FIFO and Socket?
- Write two major advantages of Round Robin Scheduling.
- What is Demand Paging?
- Briefly discuss any one page replacement algorithm.
- What are the objectives of file management?
- What is a Firewall? What is its purpose?
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SECTION-B
- Define Operating system. Why an operating system is called a resource - manager? What are various types of operating systems? Which one you feel is better and why?
- Define a Process. How it is different from a program? What is the relation between a process and a program? Explain various processes states.
- Define Thrashing. What are the reasons of thrashing and what are the solutions of handling thrashing?
- What is segmentation technique of memory management and discuss how it implemented? Also differentiate between paged segmentation and segmentation with paging.
- Discuss in detail the various disk scheduling algorithms.
- Discuss in detail the various directory structures.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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