basic-os-concepts
... Can you think of processes (e.g. in Windows) for which you will give especially high/low priority ?? ...
... Can you think of processes (e.g. in Windows) for which you will give especially high/low priority ?? ...
Introduction and Overview - Pages
... What is the role of the OS? Role #2: Resource coordinator (I.e., manager) Advantages of resource coordinator • Virtualize resources so multiple users or applications ...
... What is the role of the OS? Role #2: Resource coordinator (I.e., manager) Advantages of resource coordinator • Virtualize resources so multiple users or applications ...
Intro - Stanford Secure Computer Systems Group
... • Protection mechanism to prevent monopolizing CPU • E.g., kernel programs timer to interrupt every 10 ms - Must be in supervisor mode to write appropriate I/O registers - User code cannot re-program interval timer ...
... • Protection mechanism to prevent monopolizing CPU • E.g., kernel programs timer to interrupt every 10 ms - Must be in supervisor mode to write appropriate I/O registers - User code cannot re-program interval timer ...
Sai Uday Kiran Ravi`s presentation on Application Security on
... Sometimes it is possible to securely authenticate a local connection simply by verifying that both endpoints are in the same secure compartment. ...
... Sometimes it is possible to securely authenticate a local connection simply by verifying that both endpoints are in the same secure compartment. ...
Introduction
... • Simple batch systems (mid1950s – mid 1960s) – Permanently resident OS in primary memory – Loaded a single job from card reader, ran it, loaded next job... – Control cards in the input file told the OS what to do – Spooling allowed jobs to be read in advance onto tape/disk ...
... • Simple batch systems (mid1950s – mid 1960s) – Permanently resident OS in primary memory – Loaded a single job from card reader, ran it, loaded next job... – Control cards in the input file told the OS what to do – Spooling allowed jobs to be read in advance onto tape/disk ...
Operating Systems - inst.eecs.berkeley.edu
... – Fault: “if my program crashes yours shouldn’t” – Performance: “if my program starts to do some massive computation, it shouldn’t starve yours from running” ...
... – Fault: “if my program crashes yours shouldn’t” – Performance: “if my program starts to do some massive computation, it shouldn’t starve yours from running” ...
Slide 1
... Components of an operating system Another component of the kernel consists of a collection of device driver, which are the software that communicate the controllers to carry out operations on the peripheral devices attached to the machine. Each device driver is uniquely assigned for its particula ...
... Components of an operating system Another component of the kernel consists of a collection of device driver, which are the software that communicate the controllers to carry out operations on the peripheral devices attached to the machine. Each device driver is uniquely assigned for its particula ...
Unix
... permission to view only your own files. In order to work in your account, you will login with a username and password. (to be done before our next class.) ...
... permission to view only your own files. In order to work in your account, you will login with a username and password. (to be done before our next class.) ...
Unix
... permission to view only your own files. In order to work in your account, you will login with a username and password. (to be done before our next class.) ...
... permission to view only your own files. In order to work in your account, you will login with a username and password. (to be done before our next class.) ...
slides.01.pdf
... Problem: the execution of a program requires the allocation of resources (CPU, disks, etc) needed by that program. We therefore need to keep track of these allocations. Model: however, a program is just a series of instructions: you can’t allocate anything to that. Instead, we construct a representa ...
... Problem: the execution of a program requires the allocation of resources (CPU, disks, etc) needed by that program. We therefore need to keep track of these allocations. Model: however, a program is just a series of instructions: you can’t allocate anything to that. Instead, we construct a representa ...
the user program.
... details: control and state registers, interrupt priorities, DMA starting address,… • The kernel has several key components: – Device drivers are the hardware units managers; they hide the low level details. – File sys manager is the code that organises the data storage into files and directories, hi ...
... details: control and state registers, interrupt priorities, DMA starting address,… • The kernel has several key components: – Device drivers are the hardware units managers; they hide the low level details. – File sys manager is the code that organises the data storage into files and directories, hi ...
Os 2marks - Erode Sengunthar Engineering College
... If a process does not have enough memory for its working set, it will thrash. Providing enough frames to each process to avoid thrashing may require process swapping and scheduling 6. What Are The File Attributes? Name, type, location, size, protection, time, date and user identification these are t ...
... If a process does not have enough memory for its working set, it will thrash. Providing enough frames to each process to avoid thrashing may require process swapping and scheduling 6. What Are The File Attributes? Name, type, location, size, protection, time, date and user identification these are t ...
Operating Systems
... 17. If two processes which shares same system memory and system clock in a distributed system, What is it called? ...
... 17. If two processes which shares same system memory and system clock in a distributed system, What is it called? ...
Test 1 Operating Systems and Networking CS
... answer. If processes within a system communicated via message passing without using shared memory, would we still insist on it? State your reason. Consider the following diagram that purports to depict a mouse that could be moved around and the monitor screen that displays it as a cursor motion. Wha ...
... answer. If processes within a system communicated via message passing without using shared memory, would we still insist on it? State your reason. Consider the following diagram that purports to depict a mouse that could be moved around and the monitor screen that displays it as a cursor motion. Wha ...
Operating Systems Questions
... 1. Write a definition for an operating system; 2. Describe the main features of an operating system for example: the cost, reliability, ease of use, type of interface and how they can be customised. You need to make sure you’re using different operating systems as examples; 3. Explain what an interr ...
... 1. Write a definition for an operating system; 2. Describe the main features of an operating system for example: the cost, reliability, ease of use, type of interface and how they can be customised. You need to make sure you’re using different operating systems as examples; 3. Explain what an interr ...
Fulltext PDF
... In a uniprogramming system, main memory is divided into two parts: one part for the operating system (resident monitor, kernel) and the other for the program currently being executed. In a multiprogrammed system, the 'user' part of memory must be further sub-divided to accommodate multiple processes ...
... In a uniprogramming system, main memory is divided into two parts: one part for the operating system (resident monitor, kernel) and the other for the program currently being executed. In a multiprogrammed system, the 'user' part of memory must be further sub-divided to accommodate multiple processes ...
os_ch1-2008
... • 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 has at least one program executing in memory process – If several 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 has at least one program executing in memory process – If several job ...
No Slide Title
... Functions of the Operating System: • Provides the instruction to display the on-screen elements with which you interact. • Loads programs into the computer’s memory so that you can use them. • Coordinates how programs work with the CPU, RAM, keyboard, mouse, printer, and other hardware as well as w ...
... Functions of the Operating System: • Provides the instruction to display the on-screen elements with which you interact. • Loads programs into the computer’s memory so that you can use them. • Coordinates how programs work with the CPU, RAM, keyboard, mouse, printer, and other hardware as well as w ...
Document
... file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Table use to be the defacto standard for all operating systems and is still supported by practically all. FAT can make due as a relatively easy to su ...
... file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Table use to be the defacto standard for all operating systems and is still supported by practically all. FAT can make due as a relatively easy to su ...
CSC 150 UNGRADED QUIZ - Concordia University Wisconsin
... S/W is not allowed to directly control H/W. Instead it makes requests to use the H/W via the operating system. The operating system is the “proper channel” or ...
... S/W is not allowed to directly control H/W. Instead it makes requests to use the H/W via the operating system. The operating system is the “proper channel” or ...
Operating Systems 1
... operator as intermediary is that the users have no interaction with their jobs once they are submitted to the operator. New operating systems were developed that allowed a program being executed to carry on a dialogue with the user through remote terminals (interactive processing) – in which the u ...
... operator as intermediary is that the users have no interaction with their jobs once they are submitted to the operator. New operating systems were developed that allowed a program being executed to carry on a dialogue with the user through remote terminals (interactive processing) – in which the u ...