The double action mode it is important to take the professor gave. Refers back to two separate acad

The operating system provides an environment for the program is executed. The operating academy locations system will be developed in various academy locations ways due to the internal structure wagi vary. It is capable of multiprogramming (multiprogramming) the ability of an operating system is the most important aspect. In general, it is difficult to always keep the CPU busy or I / O devices to a single user. The CPU uses the division into the main memory (RAM) a number of programs simultaneously on a multi-programming. It increases CPU efficiency make it through always gives one job can be executed.
A multiprogramming system is more efficient than the non-multi-programming (non-multiprogramming) system. academy locations For a non-multi-programming system can not handle other tasks such as input and output for the duration of the standby processor, but it is possible to process the work during the delay period, academy locations and switch academy locations to another task for multiprogramming systems. So over the job to run in does not break any of the processor (CPU) is. (= Increase efficiency)
In addition to the function of the other operating system academy locations timesharing (Timesharing) the like. Are more familiar with multi-tasking (Multi-tasking) academy locations term for me. The logical extension of the time-division multiple-program system is basically blind. The processor executes a plurality of alternating the operation, but is felt as if all jobs are being processed at the same time, the actual shift is done because the user is at a very high speed. -> Response time (Response time) is short.
In a time division system, it is referred to a process (process) called the program has at least one respective user. And using a CPU scheduling (CPU scheduling) to the ready state of the number of tasks to process, and maximize the efficiency academy locations of the processor (CPU) By using this function, and with a multi-programming. Finally academy locations Time-sharing = CPU Scheduling + Multiprogramming
The double action mode it is important to take the professor gave. Refers back to two separate academy locations operating modes, user mode (User Mode) and kernel mode (Kernel Mode, Supervisor Mode, Privileged Mode is the same horse) academy locations is a dual mode of operation academy locations is the operating system. This zero kernel mode, the mode bit is 1 user (Modie bit) there is a guy on the hardware.
Dual mode is required if you think about why I want Is not this in order to protect the system and the user somehow. The user can have a serious impact on the system as well as to each other is often referred to as a system call (system call, also known as system calls) powerful kernel academy locations command. It may have damage to the system if running these features due to illegal users. If you attempt to execute a privileged command (privileged instruction, some of the commands that can have adverse effects on one system) in user mode, so hang the trap is not running this operating system.
Means (Program) program running processes (Process) is. The means of execution of the program will read the instructions from the main memory the processor (CPU) has been loaded into the main memory (RAM) the program stored in the auxiliary memory unit (HDD) is a program academy locations being executed academy locations is talking. That is, a single program, such as the contents of the files stored in the disk passive (passive), while it is active (active) object with a program counter (PC, program counter) with the location of the next instruction to execute the process.
1.11 Only System
To run the program, the computer must be in the main memory.
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