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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
FIXED PARTITIONING In a fixed partitioning, the operating system inhabiting some fixed portion of main memory is available for use of multiple processes -Using fixed partit
scattered resposibi;ity and authority -necessity of operation research
What are the various categories of software? System software Application software Engineering/Scientific software Embedded software Web Applications Artificial I
short note on context switching
Multithreading - Operating systems that permit different parts of a software program to run concurrently. Operating systems that would come into this category are: Linux UNI
Problem: a) The CPU can access 2 storage devices directly. What are these 2 storage devices? b) Define 2 key issues involved in memory management. c) How do processes sha
Processes and threads each have their place in multi-programming, generally to hide latency and to maximize CPU utilization. With the continuing spread of multi-core processors in
Page fault is a trap to the software gained by the hardware when a process accesses a page that is goes in the virtual address space, but not added in physical memory. In the har
Q. Consider the demand-paged computer system where the level of multiprogramming is currently fixed at four. The system was recently deliberate to determine utilization of CPU and
The drawbacks of fixed partitioning are: The number of partitions are précised at system generation time limits the number of active processes in the system. For the re
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