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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Write in detail about file concept. Write in detail about Allocation methods.

Anna University Department of Civil Engineering B. Write in detail about File-System Implementation. Difference between stable storage and tertiary storage. Anna University – B. Write in detail about Virtual memory.

Define logical address and physical address. What is mean by streams? Operqting the basic concepts of segmentation. What is process control block? What is the main function of the memory-management unit? Digital Logic Circuits—Multiplexer and De-multiple What is the information associated with an open file? What is meant by context switch? Anna University—Engineering Chemistry 1—Important Remember that frames are initially empty.


What do you mean by system calls? What is a process?

The processes are assumed to have arrived in the order p1, p2, p3, p4, p5, all at time 0. Write about the various CPU scheduling algorithms.

Define request edge and assignment edge. 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?

Explain operatinh the systeem used to prevent deadlocks 7.

CS Operating System Lecture notes – Dhilip Edition

Write notes about the protection strategies provided for files. What is a file? Write about critical regions and monitors. What is turnaround time? Write notes about disk management and swap-space management.

What notez the various page replacement algorithms used for page replacement? What is an operating system?

CS2254 Operating Systems Important Questions Nov Dec 2013 – CS2254 Part B Important Questions

Explain the various disk scheduling techniques 3. What is a Dispatcher? What are the major problems to implement demand paging?


Compare user threads and kernel threads. What are the common strategies to select a free hole from a set of available holes? What is a resource-allocation graph? Consider the following snapshot of a system: A hard disk having cylinders, numbered from 0 to What is Look Scheduling?

Newer Post Older Post Home. What are the structures used in file-system implementation? What is the kernel? What are the various file operations? Department of Computer Science and Engineering. What do you mean by first fit? List the various file attributes. Define rotational latency and disk bandwidth.