Q1. Write detailed notes on process control and file manipulation. Ans-Multiprogramming systems explicitly allow multiple processes to exist at any given time, where only one is using the CPU at any given moment, while the remaining processes are performing I/O or are waiting. The process manager is of the four major parts of the operating system. It implements the process abstraction. It does this by creating a model for the way the process uses CPU and any system resources. Much of the complexity of the operating system stems from the need for multiple processes to share the hardware at the same time. As a conseuence of this goal, the process manager implements CPU sharing ( called scheduling ), process synchronization mechanisms, and a deadlock strategy. In addition, the process manager implements part of the operating system's protection and security. Process States During the lifespan of a process, its execution status may be in one of four stat...
competitive programming guides eg.algorithms,problems,tricks ,datastructure based on cp.