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Additional Reference bits algorithm
Here we keep an 8-bit byte for every page in memory. At standard intervals the reference bit is shifted by the OS. If a shift register contains 00000000 then the page hasn't been used for the last 8 time periods. A page with a history 11000000 is more recently used than 01000000. The no of bits are able to be varied accordingly to the needs of the OS.
Logical File System Responsible for providing the before discussed interface to the user including: File access. Directory operations. Security and protection.
What is internal fragmentation? Consider holes of 20k assume the process requests 18 bites. If we allocate accurately the request block, we are left with a hole of 2k. The over
Question: (a) Modern processors operate in one of two modes: one for the operating system and one for applications. What is the purpose of having these two modes? What are
What is the kernel? A more common explanation is that the OS is the one program running at all times on the computer usually known as the kernel, with all else being applicati
Prepare Gantt Charts and Determine the Average Waiting Time 1. Classify the interaction among the processes on the basis if degree to which they are aware of each other's exi
The term Operating System (OS) is often misused. It is common, for example, for people to speak of an OS when they are in fact referring to an OS and to a set of additional applica
how copy on write on pages when many process works at a same time?
Conservative GC can be used for languages such as C and C++, which were not explicitly designed for garbage collection. This is a non-copying technique. A conservative garbage coll
System Service Program system service program Supports and provides the services for other program. System service program perform Varity of tasks. They are further divided in
Q. Some untimely computers protected the operating system by placing it in a memory partition that couldn't be modified by either the user job or the operating system itself. Expl
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