Operating Systems
... 1) An __________ is a program that controls the execution of application programs and acts as an interface between applications and the computer hardware. Answer: operating system (OS) 2) The portion of the monitor that is always in main memory and available for execution is referred to as the _____ ...
... 1) An __________ is a program that controls the execution of application programs and acts as an interface between applications and the computer hardware. Answer: operating system (OS) 2) The portion of the monitor that is always in main memory and available for execution is referred to as the _____ ...
PowerPoint XP
... Can represent simple or complex entities Can be implemented In the kernel as a driver As a user level process By remote servers ...
... Can represent simple or complex entities Can be implemented In the kernel as a driver As a user level process By remote servers ...
Computer Software - Welcome to the UNC Department of
... • A type of system software that underlies all other software. • It manages all software and hardware tasks. • It provides a common set of computer functions such as input from a keyboard and output to a monitor. • It provides the user interface……that is: • How can something as simple-minded as a pr ...
... • A type of system software that underlies all other software. • It manages all software and hardware tasks. • It provides a common set of computer functions such as input from a keyboard and output to a monitor. • It provides the user interface……that is: • How can something as simple-minded as a pr ...
Lecture-2
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each ...
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each ...
Chorusamoeba
... A process interested in surviving crashes registers itself with the server If a server fails to respond to the Boot server, it declares it as dead and arranges for a new processor on which the new copy of the process is started The boot server is itself replicated to guard against its own failure ...
... A process interested in surviving crashes registers itself with the server If a server fails to respond to the Boot server, it declares it as dead and arranges for a new processor on which the new copy of the process is started The boot server is itself replicated to guard against its own failure ...
Chapter 1
... Create a file named login.sql, and place in it the SET SQLPROMPT command. Set your SQLPATH operating system variable to include the directory location of login.sql. In this example, the SQLPATH operating system variable is set in the .bashrc operating system file, which is executed each time a new s ...
... Create a file named login.sql, and place in it the SET SQLPROMPT command. Set your SQLPATH operating system variable to include the directory location of login.sql. In this example, the SQLPATH operating system variable is set in the .bashrc operating system file, which is executed each time a new s ...
lecture8
... which is why it should not be mistaken for Windows XP Embedded, which is NT. Windows CE was used in the Sega Dreamcast along with Sega's own proprietary OS for the console. Windows Lifecycle Policy Microsoft has stopped releasing updates and hotfixes for many old Windows operating systems, including ...
... which is why it should not be mistaken for Windows XP Embedded, which is NT. Windows CE was used in the Sega Dreamcast along with Sega's own proprietary OS for the console. Windows Lifecycle Policy Microsoft has stopped releasing updates and hotfixes for many old Windows operating systems, including ...
lecture 6 - Philadelphia University
... security requirements are executed at different times • Logical Separation, in which users operate under the illusion that no other processes exist, as when an operating system constrains a program’s access so that it cannot access objects outside its permitted domain • Cryptographic Separation, in ...
... security requirements are executed at different times • Logical Separation, in which users operate under the illusion that no other processes exist, as when an operating system constrains a program’s access so that it cannot access objects outside its permitted domain • Cryptographic Separation, in ...
Evolution of Operating Systems
... • An operator was hired to perform the repetitive tasks of loading jobs, starting the computer, and collecting the output (Operator-driven Shop). • It was not feasible for users to inspect memory or patch programs directly. ...
... • An operator was hired to perform the repetitive tasks of loading jobs, starting the computer, and collecting the output (Operator-driven Shop). • It was not feasible for users to inspect memory or patch programs directly. ...
OPERATING SYSTEMS STRUCTURES
... Disks, tapes, optical, ... Free space management ( paging/swapping ) Storage allocation ( what data goes where on disk ) Disk scheduling ...
... Disks, tapes, optical, ... Free space management ( paging/swapping ) Storage allocation ( what data goes where on disk ) Disk scheduling ...
Operating System Security
... Programs are stored in persistent storage Can multiple copies of same program run simultaneously ...
... Programs are stored in persistent storage Can multiple copies of same program run simultaneously ...
System Calls
... and the operating system kernel as though they were all hardware • A virtual machine provides an interface identical to the underlying bare hardware • The operating system host creates the illusion that a process has its own processor and (virtual memory) • Each guest provided with a (virtual) copy ...
... and the operating system kernel as though they were all hardware • A virtual machine provides an interface identical to the underlying bare hardware • The operating system host creates the illusion that a process has its own processor and (virtual memory) • Each guest provided with a (virtual) copy ...
Lecture 12
... • Most commonly through use of page tables and paging hardware • To remind you, addresses issued by programs translated by hardware to physical addresses – If page tables handled right, process can’t even ...
... • Most commonly through use of page tables and paging hardware • To remind you, addresses issued by programs translated by hardware to physical addresses – If page tables handled right, process can’t even ...
![Operating Systems [OS]](http://s1.studyres.com/store/data/003405497_1-fcdfdf12ca283ac50da021c971edcf1f-300x300.png)
Operating Systems [OS]
... Separate segments of code determine what action should be taken for each type of interrupt ...
... Separate segments of code determine what action should be taken for each type of interrupt ...
Computer Science - Rainhill High School
... Be able to identify advantages and disadvantages of both graphical and command line methods for managing files and folders Understand the link between the GUI and the text-based commands that execute within an operating system Suggest situations where the command line would be preferable to a GUI fo ...
... Be able to identify advantages and disadvantages of both graphical and command line methods for managing files and folders Understand the link between the GUI and the text-based commands that execute within an operating system Suggest situations where the command line would be preferable to a GUI fo ...
L03 - UMBC
... We will be using the Linux operating system, which is very similar to UNIX. Notice that it is listed as both GUI and Command-driven. ...
... We will be using the Linux operating system, which is very similar to UNIX. Notice that it is listed as both GUI and Command-driven. ...
2.01 - Computer Science at Rutgers
... system call Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and addres ...
... system call Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and addres ...
Introduction to Object Technology
... • Methods for structuring operating system software – Modular software – Hierarchical structure: hierarchical layers and information abstraction • View the system as a series of levels • Each level performs a related subset of functions • Each level relies on the next lower level to perform more pri ...
... • Methods for structuring operating system software – Modular software – Hierarchical structure: hierarchical layers and information abstraction • View the system as a series of levels • Each level performs a related subset of functions • Each level relies on the next lower level to perform more pri ...
Operating Systems: Internals and Design Principles, 7th Edition
... 1) An __________ is a program that controls the execution of application programs and acts as an interface between applications and the computer hardware. Answer: operating system (OS) 2) The portion of the monitor that is always in main memory and available for execution is referred to as the _____ ...
... 1) An __________ is a program that controls the execution of application programs and acts as an interface between applications and the computer hardware. Answer: operating system (OS) 2) The portion of the monitor that is always in main memory and available for execution is referred to as the _____ ...
Linux Booting Procedure
... Up to 16 different images Must change LILO when kernel image file or config file is changed ...
... Up to 16 different images Must change LILO when kernel image file or config file is changed ...
Lecture 6 File Systems
... • Each volume can be thought of as a virtual disk • Volumes can also store multiple operating systems, allowing a system to boot and run more than one operating system. • Each volume that contains a file system must also contain information about the files – This information is kept in entries in a ...
... • Each volume can be thought of as a virtual disk • Volumes can also store multiple operating systems, allowing a system to boot and run more than one operating system. • Each volume that contains a file system must also contain information about the files – This information is kept in entries in a ...
Operating System Security (II)
... The central elements are the File Control Blocks In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ...
... The central elements are the File Control Blocks In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ...
Lecture 1 - Operating System Overview
... (residing in HDD) is provided and takes care of the H/W on which it runs array call (line 2) - OS allocates a space for array in the memory according to the required format and it ensures that when your friend runs the same program, it does not overwrite contents of ...
... (residing in HDD) is provided and takes care of the H/W on which it runs array call (line 2) - OS allocates a space for array in the memory according to the required format and it ensures that when your friend runs the same program, it does not overwrite contents of ...
ppt - Purdue University :: Computer Science
... Understanding one instance of an Operating System will help us understand other OSs such as Windows, Mac OS, Linux etc. UNIX is an operating system created in 1969 by Ken Thompson, Dennis Ritchie, Brian Kernighan, and others at AT&T Bell Labs. UNIX was a successor of another OS called MULTICS (Multi ...
... Understanding one instance of an Operating System will help us understand other OSs such as Windows, Mac OS, Linux etc. UNIX is an operating system created in 1969 by Ken Thompson, Dennis Ritchie, Brian Kernighan, and others at AT&T Bell Labs. UNIX was a successor of another OS called MULTICS (Multi ...
OS 2200
OS 2200 is the operating system for the Unisys ClearPath Dorado family of mainframe systems. The operating system kernel of OS 2200 is a lineal descendant of Exec 8 for the UNIVAC 1108. Documentation and other information on current and past Unisys systems can be found on the Unisys public support website.See Unisys 2200 Series system architecture for a description of the machine architecture and its relationship to the OS 2200 operating system.