Download PTU B.Tech 2020 March Civil 4th Sem CS 202 Operating System Question Paper

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Roll No. [T ‘ ‘ Total No. of Pages : 02

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Q1. Write briefly :

1. Write at least two disadvantages of layered architecture of Operating System.
2. List various CPU scheduling criteria.
3. Define the term semaphores.

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4. Differentiate between paging and segmentation scheme of memory management.
5. Differentiate between Logical and physical address space.
6. Define the term seek time.
7. Explain in brief about the term Caching.
8. Explain the term security in brief.

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9. Write two advantages of distributed operating system.
10. Write two advantages of LINUX operating system.

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SECTION-B

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Q2 What is a process? Explain the different states of a process with a diagram. Also explain in detail the Contents of PCB of a process.

Q3 What are critical sections? Why mutual exclusion required? Explain any one method of achieving mutual exclusion in detail.

Q4 Describe the access matrix model used for protection purpose.

Q5 Write a detailed note on multiprocessor operating systems.

Q6 Write a detailed note on Interrupts in reference to I/O systems.

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SECTION-C

Q7 a) Explain the following CPU scheduling algorithm :

1. Priority scheduling
2. shortest job first scheduling

b) Explain the following terms :

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1. Buffering
2. Spooling

Q8 Write a detailed note on Paging scheme of memory management.

Q9 Write a detailed note on UNIX operating system with SOLARIS.

NOTE : Disclosure of identity by writing mobile number or making passing request on any page of Answer sheet will lead to UMC case against the Student.

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