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When we download a movie from the Internet, we don't care about, say, packet sizes. However, even ifwe are not aware of howlow-level details of networks are implemented, our data is actually being sent as lots of small packets, some of which might be lost or arrive out of order. Therefore, it is important that the protocols we use guarantee that we won't have to deal with any of these problems. In other words, all we want is a simple interface that solves our problem; this interface for network programming will be provided by the operating system. Some of these abstractions are:
process-to-process communication
remote function calls
security
hosts have human-readable names
ordered, reliable communication
streams of bytes, instead of discrete packets
support for large messages
routing to ?nal destination
independence from the low-level network and hardware details
Garbage collectors trade space for time. If we collect all the time (which requires a lot of processing time), the GC allocator will use the least memory possible. On the other han
whats the use of using ipc
Safety algorithm : This is to make sure if the system is in safe state or not. It may need an order of m x n2 operation to determine if the state of the system is safe or not.
How can the deadlock be prevented? To evade deadlocks first we will have to obtain the information about how resources are to be requested. And as well we should make sure that
what is multilevel page table and its applications?
Briefly discuss on Bankers algorithm? The resource-allocation graph algorithm is not applicable to a resource-allocation system with multiple examples for each resource type.
Gang Scheduling : A set of related process is scheduled to execute on a set of processors at the similar time, on a 1-to-1 basis. Closely related processes or threads may be sched
What are threads? A thread is alike to sequential programs. Single threads have a beginning, sequence and end. At any given point in time during the runtime of the thread there
Define Virtual memory Virtual memory is employed in all major commercial operating systems
What are the objectives and functions of operating system? Functions of operating systems 1. It allocates the resources and acts as a supervisor. 2. It hides th
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