History of Operating Systems
... • After loading all the instructions and data, program had to be started • Computer had a "Run" button • "Run" button set next instruction counter to first memory location and started execution of instructions there • "Run" button was the entire operating system ...
... • After loading all the instructions and data, program had to be started • Computer had a "Run" button • "Run" button set next instruction counter to first memory location and started execution of instructions there • "Run" button was the entire operating system ...
What is an OS? • Interface between application programs and
... • Synchronous interrupts/Exceptions – Produced by the CPU control unit – Control unit issues them only after terminating the execution of an instruction • Asynchronous interrupts – Generated by other hardware devices at arbitrary times with respect to CPU clock signals • Most of the tasks performed ...
... • Synchronous interrupts/Exceptions – Produced by the CPU control unit – Control unit issues them only after terminating the execution of an instruction • Asynchronous interrupts – Generated by other hardware devices at arbitrary times with respect to CPU clock signals • Most of the tasks performed ...
William Stallings Computer Organization and Architecture
... • Simplifies handling of growing data structures • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
... • Simplifies handling of growing data structures • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
William Stallings Computer Organization and Architecture
... • Simplifies handling of growing data structures • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
... • Simplifies handling of growing data structures • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
PPT 02 - Mesa Community College
... Describe the functions of an operating system (OS) Describe the components of a personal computer operating system Describe various operating system user interfaces Describe the OS Management Functions Describe the differences among multiprocessing, multiprogramming, and time-sharing List several fu ...
... Describe the functions of an operating system (OS) Describe the components of a personal computer operating system Describe various operating system user interfaces Describe the OS Management Functions Describe the differences among multiprocessing, multiprogramming, and time-sharing List several fu ...
Operating-System - Jyoti Computer Centre
... 32) Resoure can be preemtable or non-preemtable a .True b. False c. Reusable d. Partially False 33) Condition for deadlock is a. Hold b. Wait c. Circular Wait d. All the above are required 34) _______algorithm requires each process to make in advance the maximum number of resources of each type that ...
... 32) Resoure can be preemtable or non-preemtable a .True b. False c. Reusable d. Partially False 33) Condition for deadlock is a. Hold b. Wait c. Circular Wait d. All the above are required 34) _______algorithm requires each process to make in advance the maximum number of resources of each type that ...
read queue
... • User process may accidentally or purposefully attempt to disrupt normal operation via illegal I/O instructions – All I/O instructions defined to be privileged – I/O must be performed via system calls • Memory-mapped and I/O port memory locations must be protected too ...
... • User process may accidentally or purposefully attempt to disrupt normal operation via illegal I/O instructions – All I/O instructions defined to be privileged – I/O must be performed via system calls • Memory-mapped and I/O port memory locations must be protected too ...
dsk-07-io
... 1. To cope with speed mismatch between producer and consumer of a data stream – E.g: A file is being received via modem to be stored on hard disk ...
... 1. To cope with speed mismatch between producer and consumer of a data stream – E.g: A file is being received via modem to be stored on hard disk ...
Operating Systems, 6th ed. Test Bank Chapter 4 Page 1 of 15
... 5. T / F – In a pure User-Level Thread (ULT) facility, all of the work of thread management is done by the application, but the kernel is aware of the existence of threads. 6. T / F – In the field of distributed operating system design, the One-to-Many (Thread-to-Process) relationship is particularl ...
... 5. T / F – In a pure User-Level Thread (ULT) facility, all of the work of thread management is done by the application, but the kernel is aware of the existence of threads. 6. T / F – In the field of distributed operating system design, the One-to-Many (Thread-to-Process) relationship is particularl ...
Midterm1-su13
... First question e) Where was the first operating system with a graphical user interface developed? ...
... First question e) Where was the first operating system with a graphical user interface developed? ...
Booting and Shutting Down UNIX Flavored Operating Systems
... – halt: Performs essential duties required to bring the system down, waits for the filesystem writes to complete then halts the kernel. – reboot: Executes identically to halt with the excepting that it causes to system to restart from scratch rather than halting the kernel. – kill init: This is not ...
... – halt: Performs essential duties required to bring the system down, waits for the filesystem writes to complete then halts the kernel. – reboot: Executes identically to halt with the excepting that it causes to system to restart from scratch rather than halting the kernel. – kill init: This is not ...
7 Operating Systems
... several jobs in memory at a time, and only assign a resource to a job that needs it on the condition that the resource is available. Multiprogramming brought the idea of time sharing: resources could be shared between different jobs, with each job being allocated a portion of time to use a resource. ...
... several jobs in memory at a time, and only assign a resource to a job that needs it on the condition that the resource is available. Multiprogramming brought the idea of time sharing: resources could be shared between different jobs, with each job being allocated a portion of time to use a resource. ...
hw1_wet
... sys_msgame_init is a system call (see the slides for tutorial 2). Also, you will need to change some other functions in the kernel accordingly. Code wrappers: The following describes the wrappers prototype and behavior. The actual implementation of this behavior should be implemented in the system c ...
... sys_msgame_init is a system call (see the slides for tutorial 2). Also, you will need to change some other functions in the kernel accordingly. Code wrappers: The following describes the wrappers prototype and behavior. The actual implementation of this behavior should be implemented in the system c ...
1 - OoCities
... D. _ Circular Wait: There must be a circular chain of two or more processes, each of which is waiting for a resource held by the next member of the chain. ...
... D. _ Circular Wait: There must be a circular chain of two or more processes, each of which is waiting for a resource held by the next member of the chain. ...
ppt
... • Task of dynamically subdivison of memory • Effective memory management is vital in a multiprogramming system • Uni-program —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
... • Task of dynamically subdivison of memory • Effective memory management is vital in a multiprogramming system • Uni-program —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
process management
... There are three issues here (1) How one process can pass information to another. (2) The second has to do with making sure two or more processes ...
... There are three issues here (1) How one process can pass information to another. (2) The second has to do with making sure two or more processes ...
08_Operating System Support
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
Operating System
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
What is an Operating System?
... Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with each process, file Privilege escalation allows user to change to effective ID with ...
... Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with each process, file Privilege escalation allows user to change to effective ID with ...
Concurrency: mutual exclusion and synchronization
... A programming language construct that encapsulates variables, access procedures and initialization code within an abstract data type. The monitor's variable may only be accessed via its access procedures and only one process may be actively accessing the monitor at any one time. The access procedure ...
... A programming language construct that encapsulates variables, access procedures and initialization code within an abstract data type. The monitor's variable may only be accessed via its access procedures and only one process may be actively accessing the monitor at any one time. The access procedure ...
ing systems were being developed in the
... The reasons that such a modular, multiserver design is better than a monolithic one are threefold. First, by moving most of the code from kernel mode to user mode, we are not reducing the number of bugs but we are reducing the power of each bug to cause damage. Bugs in user-mode processes have much ...
... The reasons that such a modular, multiserver design is better than a monolithic one are threefold. First, by moving most of the code from kernel mode to user mode, we are not reducing the number of bugs but we are reducing the power of each bug to cause damage. Bugs in user-mode processes have much ...
I/O Management and Disk Scheduling
... 1. To cope with speed mismatch between producer and consumer of a data stream – E.g: A file is being received via modem to be stored on hard disk – Modem is 1000x slower than HD, so a buffer is created in MM to ...
... 1. To cope with speed mismatch between producer and consumer of a data stream – E.g: A file is being received via modem to be stored on hard disk – Modem is 1000x slower than HD, so a buffer is created in MM to ...