Software nature & capabilities - Computing and ICT in a Nutshell
... • The operating system communicates with the device through a driver. • A driver is a piece of software that translates the user’s instructions - e.g. that they want a particular piece of text to be bold - into the device-specific control codes that the particular hardware uses. ...
... • The operating system communicates with the device through a driver. • A driver is a piece of software that translates the user’s instructions - e.g. that they want a particular piece of text to be bold - into the device-specific control codes that the particular hardware uses. ...
CS311 Introduction to Operating Systems I - Summer 2009
... and another is switched in. It is costly in terms of cycles because so much information must be saved so that when the old process is resumed, everything is as it was. ...
... and another is switched in. It is costly in terms of cycles because so much information must be saved so that when the old process is resumed, everything is as it was. ...
COMPUTER HARDWARE
... TYPES of FILE PROGRAM Contains the instructions of how to do a tasks e.g. payroll program for a large company. ...
... TYPES of FILE PROGRAM Contains the instructions of how to do a tasks e.g. payroll program for a large company. ...
Operating Systems Overview
... • Applications designed to run under one operating system use similar interface elements. • Under an OS such as Windows, you see a familiar interface no matter what programs you use. • In a GUI, each program opens and runs in a separate window—a frame that presents the program and its ...
... • Applications designed to run under one operating system use similar interface elements. • Under an OS such as Windows, you see a familiar interface no matter what programs you use. • In a GUI, each program opens and runs in a separate window—a frame that presents the program and its ...
full paper - Acta Electrotechnica et Informatica
... The aim of this work was to create a system for deployment of operating systems which would not utilize multicast for data transfer but peer-to-peer communication. After review of some peer-to-peer protocols, BitTorrent was proved to be the most appropriate. This is because of its methods of client ...
... The aim of this work was to create a system for deployment of operating systems which would not utilize multicast for data transfer but peer-to-peer communication. After review of some peer-to-peer protocols, BitTorrent was proved to be the most appropriate. This is because of its methods of client ...
Thomas Edison Associates Report on how to install and optimizing
... The basic function of an Operating System is to control all the Hardware and Software installed in a computer. We can't even install a software without the help of an Operating System. The Operating System acts as a middleman between the user and the computer. It allows the user to install software ...
... The basic function of an Operating System is to control all the Hardware and Software installed in a computer. We can't even install a software without the help of an Operating System. The Operating System acts as a middleman between the user and the computer. It allows the user to install software ...
Chapter 2 Operating System Overview
... a program in execution an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
... a program in execution an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
1) Routine is not loaded until it is called. All routines are kept on disk
... load format. The main program is loaded into memory & is executed. This type of loading is called _________ ...
... load format. The main program is loaded into memory & is executed. This type of loading is called _________ ...
CDF
... Module 7: File Concept; Access Methods; Directory Structure; FileSystem Mounting; File Sharing; Protection. File-System Structure; File-System Implementation; Directory Implementation; Allocation Methods; Free-Space Management. ...
... Module 7: File Concept; Access Methods; Directory Structure; FileSystem Mounting; File Sharing; Protection. File-System Structure; File-System Implementation; Directory Implementation; Allocation Methods; Free-Space Management. ...
QUIZ1
... system in a multiuser environment? What would be the most likely systems objective in each case? 19. In an operating system context, system performance could be measured using one or more of the following metrics. Explain their meaning and their relevance as possible performance measures in specific ...
... system in a multiuser environment? What would be the most likely systems objective in each case? 19. In an operating system context, system performance could be measured using one or more of the following metrics. Explain their meaning and their relevance as possible performance measures in specific ...
Operating Systems Operating System (OS) CS 217
... user mode: can execute normal instructions and access only user memory supervisor mode: can also execute privileged instructions and access all of memory (e.g., devices) ...
... user mode: can execute normal instructions and access only user memory supervisor mode: can also execute privileged instructions and access all of memory (e.g., devices) ...
Operating Software
... 5. A performance monitor is a program that accesses and reports information about various system resources and devices. The information in such reports can help a user identify problems with resources. 6. Administering Security - Most multiuser operating systems require each user to log on. Both suc ...
... 5. A performance monitor is a program that accesses and reports information about various system resources and devices. The information in such reports can help a user identify problems with resources. 6. Administering Security - Most multiuser operating systems require each user to log on. Both suc ...
operating systems
... e. Communications: One process might need to exchange information with another process. Such communication may occur between processes that are executing on the same computer or between processes that are executing on different computer systems tied together by a computer network. Communications may ...
... e. Communications: One process might need to exchange information with another process. Such communication may occur between processes that are executing on the same computer or between processes that are executing on different computer systems tied together by a computer network. Communications may ...
Course Overview, History
... • Operating systems are a class of exceptionally complex systems – Huge, parallel, very expensive, not understood • Windows NT/XP: 10 years, 1000s of people, … ...
... • Operating systems are a class of exceptionally complex systems – Huge, parallel, very expensive, not understood • Windows NT/XP: 10 years, 1000s of people, … ...
NETWORK OPERATING SYSTEMS
... These softwares are actually use to solve a problem. And the problem to be solved is user specific. You can simply say them end user programs or productivity programs, as they facilitate users to complete different tasks. System Software: Software which actually interacts with hardware. It makes it ...
... These softwares are actually use to solve a problem. And the problem to be solved is user specific. You can simply say them end user programs or productivity programs, as they facilitate users to complete different tasks. System Software: Software which actually interacts with hardware. It makes it ...
Operating Systems
... Often used as a control device in a dedicated application such as controlling scientific experiments, medical imaging systems, industrial control systems, and some display systems. Processing must be done within the defined constraints, or the system will fail. A real-time system is considered to fu ...
... Often used as a control device in a dedicated application such as controlling scientific experiments, medical imaging systems, industrial control systems, and some display systems. Processing must be done within the defined constraints, or the system will fail. A real-time system is considered to fu ...
ppt - Dave Reed`s
... monitor (OS) could switch when a job became idle (e.g., I/O) since each job had its own memory partition, minimal overhead involved in switching first multiprogramming OS: IBM OS/360 typical setup: users submitted jobs to computer operator jobs were loaded into separate memory partitions com ...
... monitor (OS) could switch when a job became idle (e.g., I/O) since each job had its own memory partition, minimal overhead involved in switching first multiprogramming OS: IBM OS/360 typical setup: users submitted jobs to computer operator jobs were loaded into separate memory partitions com ...
ppt - Dave Reed
... monitor (OS) could switch when a job became idle (e.g., I/O) since each job had its own memory partition, minimal overhead involved in switching first multiprogramming OS: IBM OS/360 typical setup: users submitted jobs to computer operator jobs were loaded into separate memory partitions com ...
... monitor (OS) could switch when a job became idle (e.g., I/O) since each job had its own memory partition, minimal overhead involved in switching first multiprogramming OS: IBM OS/360 typical setup: users submitted jobs to computer operator jobs were loaded into separate memory partitions com ...
interrupt
... When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each user ...
... When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each user ...
I. Introduction, system calls, dual mode
... Timer to prevent infinite loop / process hogging resources – Timer is set to interrupt the computer after some time period – Keep a counter that is decremented by the physical clock. – Operating system set the counter (privileged instruction) – When counter zero generate an interrupt – Set up before ...
... Timer to prevent infinite loop / process hogging resources – Timer is set to interrupt the computer after some time period – Keep a counter that is decremented by the physical clock. – Operating system set the counter (privileged instruction) – When counter zero generate an interrupt – Set up before ...
Answers to Even-Numbered Exercises
... Linux is portable, is based on standards, is written in C, has a kernel programming interface, can support many users, and can run multiple tasks simultaneously. For more information refer to “What Is So Good About Linux?” on page 6. The source code for the operating system is readily available so s ...
... Linux is portable, is based on standards, is written in C, has a kernel programming interface, can support many users, and can run multiple tasks simultaneously. For more information refer to “What Is So Good About Linux?” on page 6. The source code for the operating system is readily available so s ...
OS and Computer Architecture
... Program Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X), and Java API for the Java virtual ...
... Program Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X), and Java API for the Java virtual ...
CS 620 Comparative Operating Systems Interfaces
... The virtual address space is in general larger than the computer’s physical memory, so some virtual memory scheme is needed. The OS ensures the virtual to physical mapping for each process and also that each process can only access memory locations in its own address space. ...
... The virtual address space is in general larger than the computer’s physical memory, so some virtual memory scheme is needed. The OS ensures the virtual to physical mapping for each process and also that each process can only access memory locations in its own address space. ...