
monolithic kernel: entire operating system resides in the kernel, so that all system calls runs in supervisor mode. downside of monolithic kernel: Int

Page table: page table is mechanism through which operating system takes control over the address space and make isolation between each processes.in x

There are three cases where the control must be transferred from the user to kernel:System call when a user program asks OS to do something Illegal ac
any code that accesses shared data must have strategy for correctness despite concurrency. A lock provides mutual exclusion.machine shares one disk am
Context scheduling: outline of the context scheduling

The purpose of file system: It represent the tree named directories and files to identify the each block. (Representation)It must be can recovery from