quiz1-s3
... Turn off interrupts. d) Access I/O device. 2. Which of the following would lead you to believe that a given system is an SMP-type system? a) Each processor is assigned a specific task. b) There is a boss–worker relationship between the processors. c) Each processor performs all tasks within the oper ...
... Turn off interrupts. d) Access I/O device. 2. Which of the following would lead you to believe that a given system is an SMP-type system? a) Each processor is assigned a specific task. b) There is a boss–worker relationship between the processors. c) Each processor performs all tasks within the oper ...
Document
... listing, and generally manipulating files and directories. Status Information – ask the system for date, time, available memory/disk, used memory/disk, number of users etc. File Modification – text editors to create and modify the content of files stored on disk or tape. Programming Language Support ...
... listing, and generally manipulating files and directories. Status Information – ask the system for date, time, available memory/disk, used memory/disk, number of users etc. File Modification – text editors to create and modify the content of files stored on disk or tape. Programming Language Support ...
File management
... Device management communicates with Hardware; i.e. the secondary storage device where the file is. ...
... Device management communicates with Hardware; i.e. the secondary storage device where the file is. ...
Lecture 1
... •On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control statement” not from a card reader, but rather from the user’s keyboard. •On line file system must be available for users to access data and ...
... •On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control statement” not from a card reader, but rather from the user’s keyboard. •On line file system must be available for users to access data and ...
Computer Operating Systems (COP 4610)
... To learn the basic elements of Operating Systems To understand basic concepts of the structure and architecture of an operating system To learn how processes are managed including, scheduling, creation, and termination To learn basic process synchronization mechanisms To understand the problem of de ...
... To learn the basic elements of Operating Systems To understand basic concepts of the structure and architecture of an operating system To learn how processes are managed including, scheduling, creation, and termination To learn basic process synchronization mechanisms To understand the problem of de ...
Chapter 3.1
... • In Unix-like OS’s, a file permission matrix shows who is allowed to do what to the file. – Files have owner permissions, which show what the owner can do, and group permissions, which show what some group id can do, and world permissions, which give default access rights. ...
... • In Unix-like OS’s, a file permission matrix shows who is allowed to do what to the file. – Files have owner permissions, which show what the owner can do, and group permissions, which show what some group id can do, and world permissions, which give default access rights. ...
Introduction
... • In Unix-like OS’s, a file permission matrix shows who is allowed to do what to the file. – Files have owner permissions, which show what the owner can do, and group permissions, which show what some group id can do, and world permissions, which give default access rights. ...
... • In Unix-like OS’s, a file permission matrix shows who is allowed to do what to the file. – Files have owner permissions, which show what the owner can do, and group permissions, which show what some group id can do, and world permissions, which give default access rights. ...
Slides. - Department of Computer Science and Information Systems
... • Program in execution • Address space: list of memory locations for read and write - code, data, stack • Process table: one entry for each process, contains: list of open files, state UID etc. • Communication, scheduling ...
... • Program in execution • Address space: list of memory locations for read and write - code, data, stack • Process table: one entry for each process, contains: list of open files, state UID etc. • Communication, scheduling ...
Review Exercise 2
... (d)Control hardware devices (12)Which of the following statement about IP Address/Port is NOT correct? (a)IP address is the unique identification on a computer that is connecting to the Internet. (b)IP address are the input/output locations of a computer where messages should send in or out. (c)If ...
... (d)Control hardware devices (12)Which of the following statement about IP Address/Port is NOT correct? (a)IP address is the unique identification on a computer that is connecting to the Internet. (b)IP address are the input/output locations of a computer where messages should send in or out. (c)If ...
Operating Systems EDA092, DIT400 Why study Operating Systems
... What does an Operating System do: ...
... What does an Operating System do: ...
Answers
... Ken Thompson – Inventor of UNIX, contributed to C language. (Also inventor of B language) 2. What is POSIX? Portable Operating System Interface for Computing Environments Same system call interface standardized among UNIX-like operating systems ...
... Ken Thompson – Inventor of UNIX, contributed to C language. (Also inventor of B language) 2. What is POSIX? Portable Operating System Interface for Computing Environments Same system call interface standardized among UNIX-like operating systems ...
lecture notes
... user interface (GUI) Each layer uses functions and services of the layer (or layers) beneath it ...
... user interface (GUI) Each layer uses functions and services of the layer (or layers) beneath it ...
Introduction to operating systems
... A consistent interface between the user and the operating system. ...
... A consistent interface between the user and the operating system. ...
This course is an introduction to computer operating systems
... MAC230 Comparative Operating Systems 3 Credits; 4 Hours (3 lecture, 1 lab) ...
... MAC230 Comparative Operating Systems 3 Credits; 4 Hours (3 lecture, 1 lab) ...
2.4 The service and functions provided by an operating system can
... 2.4 The service and functions provided by an operating system can be divided into two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrentl ...
... 2.4 The service and functions provided by an operating system can be divided into two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrentl ...
Chapter 1 PowerPoint
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – Many jobs are kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job • Timesharing (multitasking) is logical extension in which CPU switc ...
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – Many jobs are kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job • Timesharing (multitasking) is logical extension in which CPU switc ...
Operating Systems - Mid Yell Junior High School
... tasks. Those jobs are being completed in the background. Example You can continue to (foreground job) word process a document whilst you are printing (background job). ...
... tasks. Those jobs are being completed in the background. Example You can continue to (foreground job) word process a document whilst you are printing (background job). ...
Systems II
... Protection refers to a mechanism for controlling the access of programs, processes or users to the resources defined by a computer system The processes in an operating system must be protected from one another’s activities Various mechanisms can be used to ensure that the files, memory segments, ...
... Protection refers to a mechanism for controlling the access of programs, processes or users to the resources defined by a computer system The processes in an operating system must be protected from one another’s activities Various mechanisms can be used to ensure that the files, memory segments, ...
Components of an operating system
... can be used to issue commands by either typing them at a command prompt or pointing and clicking the mouse on a graphical user interface (GUI). Kernel – This is the core of the operating system. The kernel is responsible for loading and operating programs or processes and managing input and output. ...
... can be used to issue commands by either typing them at a command prompt or pointing and clicking the mouse on a graphical user interface (GUI). Kernel – This is the core of the operating system. The kernel is responsible for loading and operating programs or processes and managing input and output. ...
Lecture 2
... Other Services • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, m ...
... Other Services • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, m ...
Functions of the operating systems
... 1. allows the user to organize their data on secondary storage into files & folders 2. also manages the use of main memory by splitting main memory into two parts (user area, system area). 3. Time sharing: operating system can allow more than one user to work on the same computer, and run more than ...
... 1. allows the user to organize their data on secondary storage into files & folders 2. also manages the use of main memory by splitting main memory into two parts (user area, system area). 3. Time sharing: operating system can allow more than one user to work on the same computer, and run more than ...