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Many early operating systems regarded processes as different timesharing users. The process abstraction is a popular way to organize concurrent programs, but it is not the only choice. In order to build an editing system for multiple users, a traditional organization would be that each user runs as a separate process, all those processes executing the same code, which is shared among them. An alternative organization would be for each user to send a request to a single editing server process. This corresponds to a process abstraction with a single server process that maintains queues of work to do: this process never blocks as long as there is work to do, but completes (natural break), each work item it starts then switches to working on another pending work item. In particular, the application does not block awaiting input but instead polls to find if input from another client is available: processing requests are typically divided into several work items that may be immediately queued for work to be done, Requests may be delayed pending completion of other work requests. The server process opens, modifies, and saves files on behalf of any of its clients. Discuss this alternative vis-à-vis implementing the program as per user processes coordinated by a general-purpose operating system.
benefits of dynamic linking
Enhanced second-chance algorithm. When we increase the second-chance algorithm by considering both the reference bit and the modify bit as an order pair. We have the following
A set of methods that allow executing a program which is not completely in memory is called A set of methods that allow executing a program which is not completely in memory
Q. We have stressed the require for an operating system to make efficient use of the computing hardware. When is it suitable for the operating system to forsake this principle and
To explore the UNIX file system, use basic UNIX commands and use a text editor. Task: 1. Logon to Linux. 2. Create a directory "Unix" under your home d
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Can a direct access file be read sequentially? Explain. Yes. Keep a counter, cp, initially set to 0. After reading record cp, increment cp.
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Q. a number of systems automatically delete all user files when a user logs off or a job terminates unless the user explicitly requests that they be kept other systems keep all fil
Explain in detail about ipc in linux
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