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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.
Define the DosSleep(ms) Function used in the os/2 DosSleep() suspends the currently executing thread for some time interval specified in the ms parameter. If a value of 0 is
Operating Systems 1. Explain single Partition Allocation and Multiple Partition Allocation. 2. What do you mean by PCB? What useful information is available in PCB? 3. De
is there any difference between the trap and interrupt??
What is a semaphore? A semaphore 'S' is a synchronization tool which is an integer value that, apart from initialization, is accessed only by two standard atomic operations; w
Explain Formal Language Grammar A formal language grammar is a set of formation rules which explain which strings formed from the alphabet of a formal language are syntacticall
Characteristics of suspend process Suspended process isn't immediately available for execution. The process may or may not be waiting on an event. For preventing t
Define what is Dispatcher In the Worker Model, it is the task of the Dispatcher to spawn a thread for every client-to-server connection. The Dispatcher acts as the go-between o
Gopher Gallery consists of a shopping mall and a cart ride that covers the 150 acre habitat. There are m visitors and n single-person vehicles. Visitors stroll around the mall at
1. How is reliability enhanced with the microkernel approach to system design? 2. In a virtual machine design where guest operating systems are independent virtual machines sup
Single level directory: This is the easiest directory structure. All the files are controlled in the same directory, which is simple to support and understand. Few of the li
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