MBG404_LS_02
... What is an Operating System? Interprets input from mouse and keyboard Creates the Graphical User Interface ...
... What is an Operating System? Interprets input from mouse and keyboard Creates the Graphical User Interface ...
OS Services System calls and their types
... • Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request and release code – Accounting - To keep track of which users use how much and what kinds of computer resources – Protection and ...
... • Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request and release code – Accounting - To keep track of which users use how much and what kinds of computer resources – Protection and ...
Introduction to OS
... Ans: The Operating system works as an interface between hardware and user by providing common services to programs and hiding complexities from the user. The OS provides services as kernel and the utilities and user programs have clear separation from the OS. The programs like shell and various edit ...
... Ans: The Operating system works as an interface between hardware and user by providing common services to programs and hiding complexities from the user. The OS provides services as kernel and the utilities and user programs have clear separation from the OS. The programs like shell and various edit ...
Lecture slides
... be used until the system is in a particular state, or mode, such as being ready for more than one user or having networking available. There are times in which you may want to operate the system in a lower mode. Examples are fixing disk corruption problems in run level 1 so no other users can possib ...
... be used until the system is in a particular state, or mode, such as being ready for more than one user or having networking available. There are times in which you may want to operate the system in a lower mode. Examples are fixing disk corruption problems in run level 1 so no other users can possib ...
after_introduction
... 1. program's data and stack (and the memory areas) 2. program counter, stack pointer, and other CPU registers 3. all other information necessary to run the program: process id, priority, accounting information, memory information, open files, process state, etc. 4. executable code (and the memory ar ...
... 1. program's data and stack (and the memory areas) 2. program counter, stack pointer, and other CPU registers 3. all other information necessary to run the program: process id, priority, accounting information, memory information, open files, process state, etc. 4. executable code (and the memory ar ...
Course objectives: 1. To learn the fundamentals of Operating
... 2. To learn the mechanisms of OS to handle processes and threads and their communication 3. To learn the mechanisms involved in memory management in contemporary OS 4. To gain knowledge on distributed operating system concepts that includes architecture, Mutual exclusion algorithms, deadlock detecti ...
... 2. To learn the mechanisms of OS to handle processes and threads and their communication 3. To learn the mechanisms involved in memory management in contemporary OS 4. To gain knowledge on distributed operating system concepts that includes architecture, Mutual exclusion algorithms, deadlock detecti ...
System software - Information Technology
... Protection (2) • Protection is achieved by having the operating system to have full control over the resources of the system (processor, memory and I/O devices) • Virtual memory is one of the techniques used to achieve protection between programs – Each program operates as if it were the only progr ...
... Protection (2) • Protection is achieved by having the operating system to have full control over the resources of the system (processor, memory and I/O devices) • Virtual memory is one of the techniques used to achieve protection between programs – Each program operates as if it were the only progr ...
Implementation of Log Based File Systems on Open Source
... components and software components, have similar sets of advantages and disadvantages One area of research is the tradeoffs associated with particular types of file systems. The file system is a software component that directly works with the hardware of the computer; it determines how and where fil ...
... components and software components, have similar sets of advantages and disadvantages One area of research is the tradeoffs associated with particular types of file systems. The file system is a software component that directly works with the hardware of the computer; it determines how and where fil ...
File System - QES Main Website
... storage devices, such as the hard drive • It also allow us to access external storage devices, such as USB sticks • And is even includes network ‘drives’, such as ‘Student Resources’ ...
... storage devices, such as the hard drive • It also allow us to access external storage devices, such as USB sticks • And is even includes network ‘drives’, such as ‘Student Resources’ ...
Operating Systems - Computer Science
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
Slide 2: Operating System Overview
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
Audit Considerations of Outsourcing
... 254 security levels (labels) that can be assigned to each resource object. A label indicates the users or objects that can access a resource and how. A resource object may be a data table (file), a program, a workstation, an ATM or another network device. The type of access may be read, ...
... 254 security levels (labels) that can be assigned to each resource object. A label indicates the users or objects that can access a resource and how. A resource object may be a data table (file), a program, a workstation, an ATM or another network device. The type of access may be read, ...
Operating Systems
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
... user no longer has direct access to processor job is submitted to computer operator who batches them together and places them on an input device program branches back to the monitor when finished ...
Operating Systems 2
... Components of an operating system Any access to a file is obtained at the discretion of the file manager. The procedure begins by requesting that the file manager grant access to the file through procedure known as opening the file. If the file manager approves the requested access, it provides ...
... Components of an operating system Any access to a file is obtained at the discretion of the file manager. The procedure begins by requesting that the file manager grant access to the file through procedure known as opening the file. If the file manager approves the requested access, it provides ...
Why Study OS?
... u Hardware protects from one another (mem protection) u Computer reads jobs from cards as jobs finish (spooling) u Still batch systems: can’t debug online u Solution: time-sharing u ...
... u Hardware protects from one another (mem protection) u Computer reads jobs from cards as jobs finish (spooling) u Still batch systems: can’t debug online u Solution: time-sharing u ...
Protection in General-Purpose Operating Systems
... This technique works like a file directory. Imagine the set of objects to be files and the set of subjects to be users of a computing system. Every file has a unique owner who possesses “control” access rights, including the right to declare who has what access and to revoke access to any person at ...
... This technique works like a file directory. Imagine the set of objects to be files and the set of subjects to be users of a computing system. Every file has a unique owner who possesses “control” access rights, including the right to declare who has what access and to revoke access to any person at ...
Chapter 2.pdf
... Both batch processing and time sharing use multiprogramming. The key differences are: ...
... Both batch processing and time sharing use multiprogramming. The key differences are: ...
Lecture-1
... • These libraries are stored on disk. • Linker links only the libraries referenced by the program • Main disadvantage: needs a lot of memory (for example, consider standard functions such as printf and scanf. They are used almost by every application. Now, if a system is running 50-100 processes, ea ...
... • These libraries are stored on disk. • Linker links only the libraries referenced by the program • Main disadvantage: needs a lot of memory (for example, consider standard functions such as printf and scanf. They are used almost by every application. Now, if a system is running 50-100 processes, ea ...
Operating System Structures
... CPU Protection − Timer – interrupts computer after specified period to ensure operating system maintains control. Memory Protection − In order to have memory protection, add two registers that determine the range of legal addresses a program may access: Base register – holds the smallest legal physi ...
... CPU Protection − Timer – interrupts computer after specified period to ensure operating system maintains control. Memory Protection − In order to have memory protection, add two registers that determine the range of legal addresses a program may access: Base register – holds the smallest legal physi ...
Slide 1
... Using a High-Level Language for I/O • #define statements in C are similar to EQU for associating a symbolic name with an address • They also define pointer type for C code • Use of volatile qualifier is important for I/O • Prevents unwanted compiler optimizations to that might use register instea ...
... Using a High-Level Language for I/O • #define statements in C are similar to EQU for associating a symbolic name with an address • They also define pointer type for C code • Use of volatile qualifier is important for I/O • Prevents unwanted compiler optimizations to that might use register instea ...
Chapter 2: System Structures
... Operating systems provide an environment for execution of programs and services to programs and users ...
... Operating systems provide an environment for execution of programs and services to programs and users ...
2.01
... and receives the output when all the processing is done. The computer does not prompt for further input after the processing has started. ...
... and receives the output when all the processing is done. The computer does not prompt for further input after the processing has started. ...
Operating-System Structures
... Networking The program that reads and interprets control statements is called variously: Command-line interpreter Shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services Program execution – system capability to load a program into memory a ...
... Networking The program that reads and interprets control statements is called variously: Command-line interpreter Shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services Program execution – system capability to load a program into memory a ...
4 - Operating System Basics.ppt
... – Take up little space on disk – Run on inexpensive computers ...
... – Take up little space on disk – Run on inexpensive computers ...
System
... Resource allocation – When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources – Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request an ...
... Resource allocation – When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources – Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request an ...
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.