Dear students here we provide notes for Anna university 4TH sem Subject CS OPERATING SYSTEM notes pdf. you can download the OS notes as per the. Class lecture notes for second Year,fourth semester Operating Systems (Subject Code: CS) is available here in PDF formats for you to. Why is the Operating System viewed as a resource allocator & control program? 3. What is ii) Write short notes on co-operating process and schedulers. (8).

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The status of the queue is as follows 86, ,,, What is the total distance in cylinders that the disk arm moves to satisfy the entire pending request for each of the following disk-scheduling algorithms? Write notes about the protection strategies provided for files.

cs2254 operating system question paper pdf

Mathematics 1 – January and May Question Explain about the methods used to prevent deadlocks 7. What do you mean by best fit? What is an operating system?


How to request Study Material? What is a semaphore? What are the structures used in file-system implementation? The status of the queue is as follows. Anna University – Mathematics 1 – January Que What are the functions of virtual file system VFS?

Operating Systems CS notes – Annauniversity lastest info

Department of Computer Science and Engineering. The processes are assumed to have arrived in the order p1, p2, p3, p4, p5, all at time 0. Discuss briefly the various issues involved in implementing Inter process communication IPC in message passing system. What are a safe state and an unsafe state? What is the total distance in cylinders that the disk arm moves to satisfy the entire pending request for each of the following disk-scheduling algorithms?

Basic Gates and Verilog D Where is the Menu? What are the benefits OS co-operating processes? Write short notes about Process concept and process scheduling. What do you mean by system calls? What are the requirements that a solution to the critical section problem must satisfy? What is a Dispatcher? What do you mean by first fit?


What are the methods for handling deadlocks? What is a pure demand paging? Give the basic concepts about paging.

What is the use of fork and exec system calls? Differentiate tightly coupled systems and loosely coupled systems.

Css2254 rotational latency and disk bandwidth. What are the advantages of Linked allocation? Give a detailed description about deadlocks and its characterization. Anna University – Engineering Chemistry – 1 – Nov Write in detail about directory structure. What is a resource-allocation graph? Remember that frames are initially empty. What is the basic approach of page replacement?

Explain the basic concepts of segmentation. Explain the various disk scheduling techniques 3.


What is critical section problem? Consider the following page-reference string: Anna University—Chemistry 1—January Question Explain about Multi-Threading Models. What are the various disk-scheduling algorithms? What are the most common schemes for defining the logical structure of a directory? Difference between stable storage and tertiary storage.

Anna University Syllabus Materials and Question Papers: CS OPERATING SYSTEMS QUESTION PAPER

How free-space is managed using bit vector implementation? What are the drawbacks of contiguous allocation of disk space? What are the major problems to implement demand paging? Write in detail about file concept.

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