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Title      : MSIT-103 Operating System
Subject      : Information Technology
copyright © 2018   : Karnataka State Open University
Author      : KSOU
Publisher      : Karnataka State Open University
Chapters/Pages      : 16/237
Total Price      : Rs.      : 171
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Unit 1 Total views (227)  
An operating system acts as an intermediary between the user of a computer and computer hardware. The purpose of an operating system is to provide an environment in which a user can execute programs in a convenient and efficient manner. An operating system is software that manages the computer hardware. The hardware must provide appropriate mechanisms to ensure the correct operation of the compute ......
Pages: 14
Price: Rs 0   
Unit 2 Total views (221)  
An operating system provides the environment within which programs are executed. Internally, operating systems vary greatly in their makeup, since they are organized along many different lines. The design of a new operating system is a major task. It is important that the goals of the system be well defined before the design begins. These goals form the basis for choices among various algorithms a ......
Pages: 14
Price: Rs 10.5   
Unit 3 Total views (220)  
Since main memory is usually too small to accommodate all the data and programs permanently, the computer system must provide secondary storage to back up main memory. Modern computer systems use disks as the primary on-line storage medium for information (both programs and data). The file system provides the mechanism for on-line storage of and access to both data and programs residing on the dis ......
Pages: 13
Price: Rs 9.75   
Unit 4 Total views (221)  
This unit describes the physical structure of secondary and tertiary storage devices and the resulting effects of the uses of the devices. It also explains the performance characteristics of mass-storage devices and about operating system services provided for mass storage.
Pages: 14
Price: Rs 10.5   
Unit 5 Total views (182)  
A process can be thought of as a program in execution. A process will need certain resources such as CPU time, memory, files, and I/O devices - to accomplish its task. These resources are allocated to the process either when it is created or while it is executing. A process is the unit of work in most systems. Systems consist of a collection of processes: Operating-system processes execute system ......
Pages: 15
Price: Rs 11.25   
Unit 6 Total views (183)  
The process model introduced in previous assumed that a process was an executing program with a single thread of control. Most modern operating systems now provide features enabling a process to contain multiple threads of control. This chapter introduces many concepts associated with multithreaded computer systems, including a discussion of the APls for the Pthreads, Win32, and Java thread librar ......
Pages: 28
Price: Rs 21   
Unit 7 Total views (187)  
A cooperating process is one that can affect or be affected by other processes executing in the system . Cooperating processes can either directly share a logical address space (that is, both code and data) or be allowed to share data only through files or messages. The former case is achieved through the use of lightweight processes or threads, which we discussed in previous Chapter. Concurrent a ......
Pages: 18
Price: Rs 13.5   
Unit 8 Total views (183)  
[n a multi programming environment, several processes may compete for u finite number of resources. A process requests resources; and if the resources are not available at that time, the process enters a waiting state. Sometimes, a waiting process is never again able to change state, because the resources it has requested are held by other waiting processes. This situation is called a deadlock.
Pages: 14
Price: Rs 10.5   
Unit 9 Total views (184)  
For most users, the file system is the most visible aspect of an operating system. It provides the mechanism for on-line storage of and access to both data and programs of the operating system and all the users of the computer system. The file system consists of two distinct parts: a collection of files, each storing related data, and a directory structure, which organizes and provides informatio ......
Pages: 14
Price: Rs 10.5   
Unit 10 Total views (184)  
A file system is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device(s) which contain it. A file system organizes data in an efficient manner and is tuned to the specific characteristics of the device. A tight coupling usually exists between the operating system a ......
Pages: 12
Price: Rs 9   
Unit 11 Total views (182)  
Computer security is a branch of computer technology known as information security as applied to computers and networks. The objective of computer security includes protection of information and property from theft, corruption, or natural disaster, while allowing the information and property to remain accessible and productive to its intended users. The term computer system security means the col ......
Pages: 9
Price: Rs 6.75   
Unit 12 Total views (180)  
Computer resources must be guarded against unauthorized access, malicious destruction or alteration, and accidental introduction of inconsistency. These resources include information stored in the system (both data and code), as well as the CPU, memory, disks, tapes and networking that are the computer.
Pages: 12
Price: Rs 9   
Unit 13 Total views (184)  
All operating systems provide services for programs they run. Typical services include executing a new program, opening a file, reading a file, allocating a region of memory, getting the current time of day, and so on. The focus of this text is to describe the services provided by various versions of the UNIX operating system.
Pages: 20
Price: Rs 15   
Unit 14 Total views (187)  
Before looking at the process control primitives in the next chapter, we need to examine the environment of a single process. In this chapter, we'll see how the main function is called when the program is executed, how command-line arguments are passed to the new program, what the typical memory layout looks like, how to allocate additional memory, how the process can use environment variables, a ......
Pages: 17
Price: Rs 12.75   
Unit 15 Total views (184)  
Linux is a modem, free operating system based on UNIX standards. First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility. Its history has been one of collaboration by many users from all around the world, corresponding almost exclusively over the Internet. It has been designed to run efficiently and reliably on common PC hard ......
Pages: 10
Price: Rs 7.5   
Unit 16 Total views (185)  
Multitasking operating systems come in two flavors: cooperative multitasking and preemptive multitasking. Linux, like all Unix variants and most modern operating systems, provides preemptive multitasking. In preemptive multitasking, the scheduler decides when a process is to cease running and a new process is to resume running. The act of involuntarily suspending a running process is called preem ......
Pages: 13
Price: Rs 9.75   

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