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Additional-reference-bits algorithm
We can keep an 8-bit byte for every page in a table in memory. The operating system shifts the reference bits right 1 bit, discarding the low-order bit. These 8 bits sift register have the history of page used for previous eight time periods. A page with a history value of 11000100 has been used more just than has one with 01110111. The page with the lowest number is the LRU page, and it can be changed.
define semaphore. how can we use semaphore to deal with n-process critical section problem.
EXPLAIN EMBEDDED SYSTEM
What are batch systems? Batch systems are quite appropriate for implementing large jobs that need little interaction. The user can submit jobs and return later for the results.
In which page replacement policy Balady’s anomaly occurs? FIFO (First in First Out)
What are the various categories of software? System software Application software Engineering/Scientific software Embedded software Web Applications Artificial I
Define LRU Page Replacement Algorithm LRU policy: LRU expands to least currently use. This policy suggests which we re- move a page whose last usage is farthest from current ti
Since each thread has its own processing space therefore communication between threads will need to be done through a common global variable. Since multiple threads can access the
Consider a demand-paging system with the following time-measured utilizations: CPU utilization: 10%, Paging disk: 98%, Other I/O devices: 5%. What does this imply? How to improv
W hat is hashed page table & method of hashed page table with details
Now let us present an implementation of a producer-consumer system using condition variables. This implementation works. dequeue() lock(A) while (queue empty) { wait(A, C)
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