Briefly describe the meaning of OS, its main functions and common classifications

Operating system definition: An operating system is a set of large-scale programs used to control and manage computer hardware and software resources, reasonably schedule various jobs, and facilitate users.

The following software is the operating system.

unix,windows

The OS is already included, so it's ready to use right away.

But there are a few benefits to upgrading your OS frequently:

1.Fix bugs (e.g., functional defects).

2.Add new features (no hardware changes required).

3.Added support for new ** files.

1.Abbreviation for Operating System Also known as Operation System (but this is not a standard name), it means operating system. Such as Windows, Mac, Linux, Unix, and many more are among them.

The operating system (OS) is the management of all the hardware resources and software resources of the computer system; control program operation; improve the human-machine interface; Provide support for other application software, etc., so that all the resources of the computer system can be used to the maximum extent, and provide users with a convenient, effective and friendly service interface.

The operating system is usually the layer of system software closest to the hardware, which transforms the hardware bare metal into a fully functional virtual machine, making the use and management of the computer system more convenient, the utilization of computer resources is more efficient, and the upper-layer applications can get more support than the functions provided by the hardware.

The operating system is a huge management and control program, which roughly includes five management functions: process and processor management, job management, storage management, device management, and file management. At present, the common operating systems on microcomputers are DOS, OS 2, UNIX, Xenix, Linux, Windows 2000, NetWare, etc.

Computer resources can be divided into two main categories: hardware resources and software resources. Hardware resources refer to the hardware devices that make up a computer, such as processors (including controllers and combinators), memory (divided into internal and external, internal memory includes memory, BIOS, etc.; External memory includes optical discs, USB flash drives, floppy disks, etc.), input devices (such as keyboards, mice, scanners), and output devices (such as printers, monitors, etc.).

Software resources mainly refer to various data and programs stored in a computer. The hardware and software resources of the system are allocated and scheduled by the operating system according to certain policies according to user needs.

The processor management of the operating system alternately assigns processors to programs within the system that are waiting to run according to a certain policy.

The device management of the operating system is responsible for assigning and ** external devices, as well as controlling the operation of external devices as required by the user program.

The file management of the operating system provides users with the ability to create files, undo files, read and write files, open and close files, and so on.

The storage management function of the operating system is to manage memory resources. It mainly implements memory allocation and **, storage protection and memory expansion (i.e., virtual memory).

The job management function of the operating system is to provide users with a good environment to use the system, so that users can effectively organize their workflows and make the whole system run efficiently.

1. The most basic characteristics of concurrent and shared operating systems. In order to improve the utilization of computer resources.

2. Concurrency and sharing are conditions for the existence of each other.

3. The virtual socks technology is based on the premise of concurrency and resource sharing.

4. Asynchronicity is the result of concurrency and sharing.

Operating system (OS) is a collection of programs that control and manage computer hardware and software resources, and is one of the most basic system software in a computer system. The operating system is responsible for managing and allocating the computer's memory, processor, input and output devices and other various sources, and is also responsible for scheduling the operation of various programs, so that the computer system can run efficiently, stably and safely.

3.File management: The operating system is responsible for managing all kinds of files in the computer system, including the creation, reading, writing, deletion of files, etc., through file management, various files in the computer system can be reasonably managed, so as to improve the reliability and security of the computer system.

The main functions of the operating system include the following aspects:

4.Device management: The operating system is responsible for managing various input and output devices in the computer system, including monitors, printers, mice, keyboards, etc., through device management, various devices in the computer system can be reasonably managed, so as to improve the reliability and stability of the computer system.

1.Resource management: The operating system is responsible for managing various resources in the computer system, including memory, processors, disks, input and output devices, etc., through resource management, the resources of the computer system can be fully utilized, so as to improve the efficiency of the computer system.

1.Resource management: The operating system is responsible for managing various resources in the computer system, including memory, processors, disks, input and output devices, etc., through resource management, the resources of the computer system can be fully utilized, so as to improve the efficiency of the computer system.

2.Process management: The operating system is responsible for managing the operation of each process in the computer system, including the creation, scheduling, and revocation of the process.

Operating system (OS) is a collection of programs that control and manage computer hardware and software resources, and is one of the most basic system software in a computer system. The operating system is responsible for managing and allocating the memory, processor, input and output devices and other resources of the computer, and is also responsible for scheduling the operation of various programs, so that the computer system can run efficiently, stably and safely.

Operating system (OS) is a collection of programs that control and manage computer hardware and software resources, and is one of the most basic system software in a computer system. The operating system is responsible for managing and allocating the computer's internal macro memory, processors, input and output devices and other resources, and is also responsible for scheduling the operation of various programs, so that the computer system can run efficiently, stably and safely.

3.File management: The operating system is responsible for managing all kinds of files in the computer system, including the creation, reading, writing, deletion, etc., through file management, various files in the computer system can be reasonably managed, so as to improve the reliability and security of the computer system.

The main functions of the operating system include the following aspects:

3.File management: The operating system is responsible for managing all kinds of files in the computer system, including the creation, reading, writing, deletion and so on of files.

Operating system (OS) is a collection of programs that control and manage computer hardware and software resources, and is one of the most basic system software in a computer system. The operating system is responsible for managing and allocating the computer's memory, processor, input and output devices and other resources, and is also responsible for scheduling the operation of various programs, so that the computer system can run efficiently, stably and safely.

4.Device management: The operating system is responsible for managing various input and output devices in the computer system, including monitors, printers, mice, keyboards, etc., through device management, various devices in the computer system can be reasonably managed, so as to improve the reliability and stability of the computer system.

The main functions of the operating system include the following aspects:

4.Device management: The operating system is responsible for managing various input and output devices in the computer system, including monitors, printers, mice, keyboards, etc., through device management, various devices in the computer system can be reasonably allocated and eliminated management, so as to improve the reliability and stability of the computer system.

In short, the operating system is an indispensable part of the computer system, and its main role is to manage and schedule various resources and programs in the computer system, so that the computer system can run efficiently, stably and safely.

1.Resource management: The operating system is responsible for chain management of various resources in the computer system, including memory, processors, disks, input and output devices, etc., through resource management, the resources of the computer system can be fully utilized, so as to improve the efficiency of the computer system.

In short, the operating system is an indispensable part of the computer system, and its main role is to manage and schedule various resources and programs in the computer system, so that the computer system can run efficiently, stably and safely.

2.Process management: The operating system is responsible for managing the operation of each process in the computer system, including the creation, scheduling, and revocation of the process.

OS is the system software responsible for supporting the application running environment and the user operating environment in the computer system, and it is also the core and cornerstone of the computer system. Its responsibilities are typically administration, as well as providing application-oriented services such as job management, and so on.

The OS provides support for other application software, etc., so that all the resources of the computer system can be used to the maximum extent, and provides users with a convenient, effective and friendly service interface. The operating system is a huge management and control program, which roughly includes five aspects of the management function: process and processor management, job management, storage management, device management, and file management.

From the user's point of view, the OS is ().

a.The interface between the user and the computer's hardware system.

b.Software for organizing computer workflows in a rational manner.

c.A large syndicate mausoleum software.

d.Software that controls and manages the resources of a computer system.

Correct Answer: a

OS is the abbreviation of operating system, that is, the meaning of operating system, the operating system can be divided into PC system (that is, personal computer) and mobile operating system (system used by mobile phones and tablets) according to the device, PC system has: black apple, Windows (commonly used system on PC), Linux (including Unix, Ubuntu, China's Kirin uses this kernel), Mac OS (the system used by Apple computersAnd a very old system: DOS (that is, white on a black background, when using the keyboard to enter instructions, is jointly developed by IBM and Microsoft, and later IBM sold to Microsoft, Microsoft renamed it MS-DOS), the system on the mobile phone has:

Windows Mobile, iOS (Apple-developed system), Android (Google-developed mobile phone system) and Symbian (now no one uses this system), and the tablet systems are: Windows Mobile, iOS (Apple-developed system), Android (Google-developed mobile phone system).

OS is the full name of operating system.

Fields of application. It can be divided into desktop operating system, server operating system, and embedded operating system;

Number of supported users.

It can be divided into single-user operating systems (such as MSDOS, OS 2 Windows) and multi-user operating systems (such as Unix, Linux, and MVS).

The degree of openness of the source code.

It can be divided into open-source operating systems (such as Linux, FreeBSD) and closed-source operating systems (such as Mac OS X, Windows);

Hardware structure. It can be divided into network operating systems (Netware, Windows NT, OS 2 Warp), multi-** operating systems (AMIGA), and distributed operating systems.

Operating system environment.

It can be divided into batch operating systems (such as MVX, DOS VSE), time-sharing operating systems (such as Linux, Unix, Xenix, Mac OS X), and real-time operating systems (such as IEMX, VRTX, RTOS, RT Windows);

Memory addressing wide.

The operating system can be divided into 8-bit, 16-bit, 32-bit, 64-bit, and 128-bit operating systems. Earlier operating systems generally only supported 8-bit and 16-bit memory finger hunt widths, while modern operating systems such as Linux and Windows 7 support both 32-bit and 64-bit.