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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List the various file attributes. What is the use of boot block?

Anna University Department of Civil Engineering B. What are conditions under which a deadlock situation may arise?


Define logical address and physical address. What is preemptive and no preemptive scheduling?

What is sector sparing? What is a resource-allocation graph? The status of the queue is as follows. Anna University – Mathematics 1 – January Que What are the structures used in file-system implementation?

Operating Systems CS notes – Annauniversity lastest info

Write in detail about directory structure. What do you mean by best fit?

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What is real time system? Anna University – Engineering Chemistry 1 – Januar State the advantage of multiprocessor system. 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?

What is a reference string? What are the drawbacks of contiguous allocation of disk space? Write notes about disk management and swap-space management.

What is a file? What are the allocation methods of a disk space? Define busy waiting and spin lock. Basic Gates and Verilog D Anna University—Engineering Chemistry 1—Important Mathematics 1 – January and May Question Write in detail about file concept.

Anna University – B. Newer Post Older Post Home. What are the common strategies to select a free hole from a set of available holes? What are the requirements that a solution to the critical section problem must satisfy? What is meant by context switch?

cs2254 operating system question paper pdf

Write about critical regions and monitors. Discuss briefly the various issues involved in implementing Inter process communication IPC in message passing system. Explain what semaphores are, their usage, implementation given to avoid busy waiting and binary semaphores.


Write short notes about Process concept and process scheduling.

What are the different accessing methods of a file? What is the kernel? Write in detail about Virtual memory. What are the advantages of Indexed allocation? What are the benefits OS co-operating processes?

Explain the various types of computer systems. Write in detail about File-System Implementation. What is Demand paging? What is a pure demand paging? How free-space is managed using bit vector implementation? What is a Dispatcher? What are the disadvantages of linked allocation? Write notes about the protection strategies provided for files.

What is independent process? How to request Study Material? What are the advantages of Linked allocation? What is a semaphore? What is the use of fork and exec system calls? Define rotational latency and disk bandwidth.