CSNB334 Advanced Operating Systems Course Introduction
... The theory part of this course focuses on design issues of the Linux operating system. The course uses the theoretical knowledge learned in the prerequisite course CSNB224/CCSB234 Operating System Concepts. The practical part of the course ◦ Will take you on the programming tasks of writing code ...
... The theory part of this course focuses on design issues of the Linux operating system. The course uses the theoretical knowledge learned in the prerequisite course CSNB224/CCSB234 Operating System Concepts. The practical part of the course ◦ Will take you on the programming tasks of writing code ...
Lecture 10
... Frameworks are large bodies (usually many classes) of prewritten code to which you add your own code to solve a problem in a specific domain. In Java technology there are so many frameworks that helps the programmers to build complex applications easily. ...
... Frameworks are large bodies (usually many classes) of prewritten code to which you add your own code to solve a problem in a specific domain. In Java technology there are so many frameworks that helps the programmers to build complex applications easily. ...
Introduction to UNIX System
... program and the file containing the kernel for the system. The name of the kernel file varies , but will usually include the letters “nix” so you can search for it with wildcard characters. ...
... program and the file containing the kernel for the system. The name of the kernel file varies , but will usually include the letters “nix” so you can search for it with wildcard characters. ...
Java is a simple, object-oriented, distributed, interpreted, robust
... independently of its other parts Multi-threaded programs can do multiple things at once – example: • download a file from the web while still looking at other web pages Question: What is the problem with multiple agents working at the same time? – synchronization ...
... independently of its other parts Multi-threaded programs can do multiple things at once – example: • download a file from the web while still looking at other web pages Question: What is the problem with multiple agents working at the same time? – synchronization ...
hand-out - Jan Thorbecke
... • System-call interface maintains a table indexed according to these numbers ...
... • System-call interface maintains a table indexed according to these numbers ...
Processes
... Child of a parent process. The child might execute the same program as the parent. But, it might execute a completely different routine. In any case, the child is a separate process with its own address space and PCB. ...
... Child of a parent process. The child might execute the same program as the parent. But, it might execute a completely different routine. In any case, the child is a separate process with its own address space and PCB. ...
//This is a comment. public class MyProgram { public static void main
... The word main is the name of a method, which is the beginning of a sequence of programming a sequence of programming statements. A method is always followed by parentheses. Sometimes the parentheses are empty, and other times they contain information. In this case, you can see (String[ ] arg ...
... The word main is the name of a method, which is the beginning of a sequence of programming a sequence of programming statements. A method is always followed by parentheses. Sometimes the parentheses are empty, and other times they contain information. In this case, you can see (String[ ] arg ...
Windows booting procedure
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
Module 4: Processes
... User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast ...
... User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast ...
BackDoors
... but he would be better off choosing a service that never gets used and that is either activated manually or even completely disabled. It is sufficient to remove it using the srvinstw.exe utility and again to install a new service with the same name. By doing so, the hacker considerably reduces possi ...
... but he would be better off choosing a service that never gets used and that is either activated manually or even completely disabled. It is sufficient to remove it using the srvinstw.exe utility and again to install a new service with the same name. By doing so, the hacker considerably reduces possi ...
Integrating High-Performance Polynomial Arithmetic into Maple
... 100 lines. From modpn, it makes use of its basic polynomial operations, such as polynomial GCD, evaluation and interpolation. One can see than less than 10% of the total running time is spent at the C level, despite of the fact that all the expensive algebraic computations are performed at that leve ...
... 100 lines. From modpn, it makes use of its basic polynomial operations, such as polynomial GCD, evaluation and interpolation. One can see than less than 10% of the total running time is spent at the C level, despite of the fact that all the expensive algebraic computations are performed at that leve ...
Introduction to Linux/Unix
... Permissions are set at three user levels: owner, u (u from user) group member, g and World, o (All Others outside owner and owner’s group). ALL, a i.e u+g+o ...
... Permissions are set at three user levels: owner, u (u from user) group member, g and World, o (All Others outside owner and owner’s group). ALL, a i.e u+g+o ...
Unix Basics - Computer Science
... “which” command will tell you where the command is found in the path. “man” command can get the information about commands and standard C library ...
... “which” command will tell you where the command is found in the path. “man” command can get the information about commands and standard C library ...
Lecture 1 - The Department of Computer Science
... • An operating system also has a vital role to play in security. Its job includes preventing unauthorized users from accessing the computer system. • Examples of popular modern operating systems include Microsoft Windows, Android,, Linux, Mac OS X, and IBM z/OS. ...
... • An operating system also has a vital role to play in security. Its job includes preventing unauthorized users from accessing the computer system. • Examples of popular modern operating systems include Microsoft Windows, Android,, Linux, Mac OS X, and IBM z/OS. ...
CS307-slides02
... System Call Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Example: System call sequence to copy the contents of one file to another ...
... System Call Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Example: System call sequence to copy the contents of one file to another ...
CS 377: Operating Systems Outline
... • Do not need to reboot and reload the full OS after each change • Also, a way around Linux’s licensing restrictions: kernel modules do not need to be released under the GPL • Would require you to release all source code ...
... • Do not need to reboot and reload the full OS after each change • Also, a way around Linux’s licensing restrictions: kernel modules do not need to be released under the GPL • Would require you to release all source code ...
16MCA24 - PESIT South
... 4. CO U RS E OUTCOMES: The STUDENT WILL BE ABLE : 1.Gain extensive knowledge on principles and modules of operating system. 2.Understand key mechanisms in design of operating system modules. 3.Understand process management, concurrent processes and threads, memory management, virtual memory concepts ...
... 4. CO U RS E OUTCOMES: The STUDENT WILL BE ABLE : 1.Gain extensive knowledge on principles and modules of operating system. 2.Understand key mechanisms in design of operating system modules. 3.Understand process management, concurrent processes and threads, memory management, virtual memory concepts ...
ppt
... • A process is an abstraction that supports running programs • Different processes may run several instances of the same program • In most systems, processes form a tree, with the root being the first process to be created • At a minimum, the following resources are required: – Memory to contain the ...
... • A process is an abstraction that supports running programs • Different processes may run several instances of the same program • In most systems, processes form a tree, with the root being the first process to be created • At a minimum, the following resources are required: – Memory to contain the ...
Chapter 4 - Killarney Secondary School
... All files start at the root directory All other directories branch off of the root directory Must know the path to find files in DOS Paths are typed in either relatively or absolute ...
... All files start at the root directory All other directories branch off of the root directory Must know the path to find files in DOS Paths are typed in either relatively or absolute ...
Operating-System Structures
... to these numbers. • The system call interface invokes intended system call in kernel and returns status of the system call and any return values. • The caller need know nothing about how the system call is implemented: – Just needs to obey API and understand what OS will do as a result call. – Detai ...
... to these numbers. • The system call interface invokes intended system call in kernel and returns status of the system call and any return values. • The caller need know nothing about how the system call is implemented: – Just needs to obey API and understand what OS will do as a result call. – Detai ...
Threads
... reads and interprets the executable file Allocates memory for the new process and sets process’s memory to contain code & data from executable ...
... reads and interprets the executable file Allocates memory for the new process and sets process’s memory to contain code & data from executable ...
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.