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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What are the various scheduling criteria for CPU scheduling? What are the different accessing methods of a file?

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

What is a Dispatcher? Consider the following snapshot of a system: What is independent process? Consider the following page-reference string: What is a resource-allocation graph? What are the structures used in file-system implementation? Write in detail about file concept. What are the most common schemes for defining the logical structure of a directory? What are the disadvantages of linked allocation? Write notes about disk management and swap-space management.


Anna University – Mathematics 1 – January Que What is real time system? What is the basic approach of page replacement?

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

Explain the various types of computer systems. Explain the various page replacement strategies. What are the common strategies to select a free hole from a set of available holes? What are the major problems to implement demand paging? 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 low-level formatting?

Remember that frames are initially empty.

What are the benefits OS co-operating processes? What are the various page replacement algorithms used for page replacement?

What is meant by context switch? What are the functions of virtual file system VFS? What is a process?

What are the benefits of multithreaded programming? What is Look Scheduling? Briefly sysrem the types of system calls provided by a typical operating system. What is a reference string?


What is process control block? Write about the various CPU scheduling algorithms.

What is dispatch latency? A hard disk having cylinders, numbered from 0 to What is critical section problem? Write in detail about Virtual memory. Anna University—Chemistry 1—January Question Basic Gates and Verilog D What operaing an operating system?

What is the use of fork and exec system calls?

Write in detail about File-System Implementation. Write in detail about Allocation methods. Compare user threads and kernel threads.


What is logical address space and physical address space? Explain about Multi-Threading Models. Write short notes about Process concept and process scheduling.

What do you mean by system calls? How free-space is managed using bit vector implementation?