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Buddy system of memory allocation
Free memory is used to maintain in linked lists, each of similar sized blocks. Every block is of size 2^k. When some memory is needed by a thread, the block part of next higher order is selected, and divided into two. Note that the two such pieces different in address only in their kth bit. Such pieces are known as buddies. When any used part is freed, the OS examines to see if its buddy is also free. If so, it is reconnected, and sends into the original free-block linked-list.
The principle is that of ordinary addition; however remember the highest number is 1. Calculate the following: 11001 + 11
What does the last four digits '0010' of the above dump represent? What action will the Destination node takes when it receives this packet? The last four digits '0010' denotes
WHAT IS OPERATING SYSTEM ?ENLIST AND EXPLAIN BASIC SERVICES PROVIDE BY OS
Q. What is the major advantage of the layered approach to system design? What are the de-merits of using the layered approach? Answer: As in all cases of modular design as well
Define ‘LRU’ page replacement policy LRU is Least Recently Used page replacement policy.
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
Explain multilevel queue scheduling and multilevel feedback queue scheduling #Minimum 100 words accepted#
a summary of what operating system do
Write a program (with the programming language and on the platform of your choice) to demonstrate the memory leak problem (see http://en.wikipedia.org/wiki/Memory_leak for detail
Determine the syntax of the Fork and Join Primitive Answer: Syntax of the Fork and Join Primitive is as follow: Fork Join
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