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CONTROL PROGRAMS
Control Programs are those programs which control & maintain the operation of computer. They provide basic facilities. Control program are further divided into further two categories
i). Initial program loader (IPL): it is essential part of an operating system. It is located permanently in the memory, which is called rom. It is also called resident routine. The basic purpose of IPL is to load other operating system program from secondary memory into the ram. Example:- when Computer is turned ON, then electronic chip is automatically activated & IPL read the boot sector routine (BSR), reside in the primary memory.
ii). supervisors programs: - A supervisory program or supervisor is a computer program, usually part of an operating system, which controls the execution of other routines. It regulates work scheduling, input/output operations, error actions, and similar functions and regulates the flow of work in a data processing system. In case of DOS the command.com is considered as supervisor and once loaded, it will remain all the time in memory while the computer is running.
iii) Job Controller: it is and important element of timesharing system. It recognizes job priorities and provides necessary steps to go from one program to the next. Example SJF (shortest job first)
Problem: a) Define a ‘file' and list the objectives of the file management system. b) List the ways in which programs access files and determine for what file types you woul
Page fault is a trap to the software gained by the hardware when a process accesses a page that is goes in the virtual address space, but not added in physical memory. In the har
Q. Explain about Spooling? Acronym for simultaneous peripheral operations on line. Spooling denotes to putting jobs in a buffer, a special area in memory or on a disk where
Define request edge and assignment edge. Answer: A directed edge from process Pi to resource type R j is denoted by Pi->j; it signifies that process Pi requested an instance
Q. Illustrate the Operating System Components? Modern operating systems share the goal of supporting system components. System components are: 1. Process Management 2.
Question: (a) Distinguish between local and active directory Group Policy in Windows Server 2008? (b) Describe the three areas of account Policies that can be managed thro
LRU page replacement In slightest recently used page replacement algorithm we will replace that page that hasn't been used for the longest period of time. This is similar as an
Questiion 1 Use Priority Scheduling Algorithm to schedule the following processes Process Burst Time Priority/Time P1
Your CTO liked your proposal from Unit 2 so much he only trusts you to explain complex concepts to his managers. He now wants you to write him a four page paper explaining the CPU,
Explain the Sleep (ms) Function This call places the current thread in a suspended state for the number of milliseconds passed as the parameter (ms). After that Windows NT wil
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