lecture6
... MS DOS is an acronym that stands for MicroSoft Disk Operating System. It is often referred to as DOS. It is an old operating system for x86-based personal computers, purchased by Microsoft that manages everything on your computer: hardware, memory, files. It is an operating system that existed prior ...
... MS DOS is an acronym that stands for MicroSoft Disk Operating System. It is often referred to as DOS. It is an old operating system for x86-based personal computers, purchased by Microsoft that manages everything on your computer: hardware, memory, files. It is an operating system that existed prior ...
3.4.1 Shared-Memory Systems
... 3.4 Inter-process Communication Processes executing concurrently in the operating system may be either independent processes or cooperating processes. A process is independent if it cannot affect or be affected by the other processes executing in the system. Any process that does not share data with ...
... 3.4 Inter-process Communication Processes executing concurrently in the operating system may be either independent processes or cooperating processes. A process is independent if it cannot affect or be affected by the other processes executing in the system. Any process that does not share data with ...
Operating Systems History
... • The programs can access directly to some function in superivor mode throught a System ...
... • The programs can access directly to some function in superivor mode throught a System ...
x86 ISA
... So you’d learn how to program at the x86 level There is an online manual covering every details ...
... So you’d learn how to program at the x86 level There is an online manual covering every details ...
Operating Systems
... Now in the Learning Hub Assumes you are using Audacity If not, please see me asap Seems a lot, but shouldn’t be too hard once you have Audacity and your files ...
... Now in the Learning Hub Assumes you are using Audacity If not, please see me asap Seems a lot, but shouldn’t be too hard once you have Audacity and your files ...
Work with Files and Directories
... • Windows – a graphical user interface (GUI) that uses the mouse rather than arcane and complex command options to execute a job. • Windows first swept the desktop market (with Windows 3.1/95/98/Me) and then made significant inroads into the server market (with Windows NT/2000). • The MIT introduced ...
... • Windows – a graphical user interface (GUI) that uses the mouse rather than arcane and complex command options to execute a job. • Windows first swept the desktop market (with Windows 3.1/95/98/Me) and then made significant inroads into the server market (with Windows NT/2000). • The MIT introduced ...
CS 390 Unix Programming Environment
... One of the primary desire of having an operating system is to shield programmers from the complexity of the hardware • OS is a layer that sits on top on hardware • OS provides an interface or virtual machine that is easy to understand and program ...
... One of the primary desire of having an operating system is to shield programmers from the complexity of the hardware • OS is a layer that sits on top on hardware • OS provides an interface or virtual machine that is easy to understand and program ...
process control block
... jobs, whereas time-shared system has user programs or tasks, Even on a single-user system such as Microsoft Windows, a user may be able to run several programs at one time: a word processor, a Web browser and an e-mail package. And even if the user can execute only one program at a time, the operati ...
... jobs, whereas time-shared system has user programs or tasks, Even on a single-user system such as Microsoft Windows, a user may be able to run several programs at one time: a word processor, a Web browser and an e-mail package. And even if the user can execute only one program at a time, the operati ...
![Operating Systems [OS]](http://s1.studyres.com/store/data/003405497_1-fcdfdf12ca283ac50da021c971edcf1f-300x300.png)
Operating Systems [OS]
... I/O operations – A running program may require I/O, which may involve a file or an I/O device ...
... I/O operations – A running program may require I/O, which may involve a file or an I/O device ...
Tthe Re-design Imperative Why Many
... “Amdahl‟s law and the corollary we offer for multicore hardware seek to provide insight to stimulate discussion and future work. Nevertheless, our specific quantitative results are suspect because the real world is much more complex. Currently, hardware designers can‟t build cores that achieve arbi ...
... “Amdahl‟s law and the corollary we offer for multicore hardware seek to provide insight to stimulate discussion and future work. Nevertheless, our specific quantitative results are suspect because the real world is much more complex. Currently, hardware designers can‟t build cores that achieve arbi ...
Lecture 1 - Concepts of the UNIX Operating System
... COMMAND ARGUMENTS NEED NOT BE KNOWN IN ADVANCE. ALLOWS DESIGNING OF APPLICATIONS THAT DETERMINE THEIR OWN BEHAVIOR BY READING CONFIGURATION FILES. ...
... COMMAND ARGUMENTS NEED NOT BE KNOWN IN ADVANCE. ALLOWS DESIGNING OF APPLICATIONS THAT DETERMINE THEIR OWN BEHAVIOR BY READING CONFIGURATION FILES. ...
slides
... other virtual machines. This isolation, however, permits no direct sharing of resources. • A virtual-machine system is a perfect vehicle for operatingsystems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal s ...
... other virtual machines. This isolation, however, permits no direct sharing of resources. • A virtual-machine system is a perfect vehicle for operatingsystems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal s ...
Lec3
... – Easier for operating system builder: get rid of problem of concurrency by defining it away. – For personal computers, idea was: one user does only one thing at a time. – Harder for user: can’t work while waiting for printer ...
... – Easier for operating system builder: get rid of problem of concurrency by defining it away. – For personal computers, idea was: one user does only one thing at a time. – Harder for user: can’t work while waiting for printer ...
Document
... concatenate the host name to the names of files stored on that host system-wide uniqueness guaranteed simple to located a file not location transparent or location independent ...
... concatenate the host name to the names of files stored on that host system-wide uniqueness guaranteed simple to located a file not location transparent or location independent ...
Chapter 1
... An operating system (OS) is a set of programs that manages computer hardware resources, and provides common services for application software. The operating system is the most important type of system software in a computer system. Without an operating system, a user cannot run an application progra ...
... An operating system (OS) is a set of programs that manages computer hardware resources, and provides common services for application software. The operating system is the most important type of system software in a computer system. Without an operating system, a user cannot run an application progra ...
Operating Systems – OS Architecture Models
... to its logical conclusion. Hardware is simulated in software; all resources are virtualized; individual OS run on virtualized resources • A virtual machine provides an interface identical to the underlying bare hardware • The operating system creates the illusion of multiple processes, each executin ...
... to its logical conclusion. Hardware is simulated in software; all resources are virtualized; individual OS run on virtualized resources • A virtual machine provides an interface identical to the underlying bare hardware • The operating system creates the illusion of multiple processes, each executin ...
2007-06.pdf
... Creating a software drive is nothing but creating the means such that other tools can access data as if it where placed on a real drive. The equivalent in UNIX is actually creating a mount point. 7b What does mounting the CD ISO image actually establish in Windows? By mounting the ISO image, we have ...
... Creating a software drive is nothing but creating the means such that other tools can access data as if it where placed on a real drive. The equivalent in UNIX is actually creating a mount point. 7b What does mounting the CD ISO image actually establish in Windows? By mounting the ISO image, we have ...
Slide 1
... – it possesses excellent cross-platform capabilities – it is supported by many international companies operating in various fields. – plenty of Open Source software Development Tools available ...
... – it possesses excellent cross-platform capabilities – it is supported by many international companies operating in various fields. – plenty of Open Source software Development Tools available ...
Operating System Structures
... operating system provides services and manages resources user processes request services from the OS through system calls ...
... operating system provides services and manages resources user processes request services from the OS through system calls ...
DEC 2004 SECTION –A (Marks : 2 Each) Q.1 (a) What is spooling
... Q.1 (b) Differentiate static relocation and dynamic relocation. Ans.: Static relocation : In Static relocating all the routing is loaded into memory. The main – program is also loaded into man memory and execute it. If it require any routine any routine or of it is having call to any routine and dir ...
... Q.1 (b) Differentiate static relocation and dynamic relocation. Ans.: Static relocation : In Static relocating all the routing is loaded into memory. The main – program is also loaded into man memory and execute it. If it require any routine any routine or of it is having call to any routine and dir ...
1.1 What is an Operating System?
... to determine what action to take. For example, if it finds a read request, the controller will start the transfer of data from the device to its local buffer. Once the transfer of data is complete, the device controller informs the CPU that it has finished its operation. It accomplishes this communi ...
... to determine what action to take. For example, if it finds a read request, the controller will start the transfer of data from the device to its local buffer. Once the transfer of data is complete, the device controller informs the CPU that it has finished its operation. It accomplishes this communi ...
Lecture #3: Operating
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
Chapter 3 Operating Systems
... command processor asks the scheduler to arrange for the execution of programs. - Place the program in a job queue. - Create a process to execute the program. A process is an active copy of a program - that has been loaded into memory (RAM) - with its own program counter indicating the next instructi ...
... command processor asks the scheduler to arrange for the execution of programs. - Place the program in a job queue. - Create a process to execute the program. A process is an active copy of a program - that has been loaded into memory (RAM) - with its own program counter indicating the next instructi ...
Operating System Services
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface ...
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface ...
Module 3: Operating
... • The virtual-machine concept provides complete protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources. • A virtual-machine system is a perfect vehicle for operating-systems research and d ...
... • The virtual-machine concept provides complete protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources. • A virtual-machine system is a perfect vehicle for operating-systems research and d ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.