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Define caching.
A cache is a region of fast memory that holds copies of data. Access to the cached copy is well-organized than access to the original. Caching and buffering are separate functions, but sometimes a region of memory can be used for together purposes.
Q. How could a system be designed to allow a choice of operating systems to boot from? What would the bootstrap program need to do? Answer: Delieve a system that would like to
Minor page fault :I f the page is loaded in memory at the time the fault is started, but is not checked in the memory management unit as being loaded in memory, then it is named a
Define I/O and CPU Bursts Applications typically to through cycle of CPU bursts and Input/output bursts. Since the CPU sits idle during I/O operations, efficiency is improved
What is scheduler? A process migrates among the various scheduling queues throughout its life time. The OS must choose processes from these queues in some fashion. This selecti
State critical section problem? Discuss three solutions to solve the critical section problem. C-S Problem:- n processes all competing to use some shared data Every
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 th
FIRST FIT ALGORITHM Scanning a list along with if a free hole is available with necessary space for the process to allocate it allocates the process in that space. The first s
USER-LEVEL THREADS (ULT) In this level the kernel isn't aware of the existence of threads -- All thread management is complete by the application by using a thread library. Th
Explain about demand paging? A demand paging system is same to a paging system with swapping. Processes reside on secondary memory. When we require executing a process, we chan
Load Sharing : Processes are not given to a particular processor. A global queue of threads is used to maintain. Each processor, when idle, picks a thread from this queue. Note th
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