Operating System Definition
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Questions and Answers

What is the main function of an operating system?

  • To allocate computer hardware resources only
  • To develop computer hardware
  • To provide security mechanisms only
  • To provide common services to computer programs and manage computer hardware resources (correct)
  • What is the relationship between an operating system and computer hardware?

  • The operating system manages and allocates computer hardware resources (correct)
  • The operating system is independent of the computer hardware
  • The operating system is a part of the computer hardware
  • The operating system is managed by the computer hardware
  • What is one of the key characteristics of an operating system?

  • Resource deallocation
  • Hardware management (correct)
  • Hardware development
  • Software development
  • What is the primary role of an operating system in terms of computer programs?

    <p>To provide common services to computer programs</p> Signup and view all the answers

    What is the main purpose of the operating system in terms of access control?

    <p>To provide mechanisms for controlling access to computer resources</p> Signup and view all the answers

    Study Notes

    Definition of an Operating System

    • An operating system (OS) is a software that manages computer hardware resources and provides common services to computer programs.
    • It acts as an intermediary between computer hardware and user-level applications.

    Key Characteristics:

    • Hardware Management: OS manages and allocates computer hardware resources such as CPU, memory, and storage devices.
    • Process Management: OS manages the creation, execution, and termination of processes (programs) running on the computer.
    • Resource Allocation: OS manages the allocation and deallocation of system resources such as memory, I/O devices, and CPU time.
    • Security: OS provides mechanisms for controlling access to computer resources and protecting against unauthorized access.

    Types of Operating Systems:

    • Single-User, Single-Tasking: MS-DOS
    • Multi-User, Single-Tasking: Early Unix
    • Multi-User, Multi-Tasking: Modern operating systems such as Windows, Linux, and macOS

    作业系统定义

    • 作业系统(OS)是管理计算机硬件资源并为计算机程序提供公共服务的软件。

    作业系统关键特征

    • 硬件管理:OS 管理和分配计算机硬件资源,如 CPU、内存和存储设备。
    • 进程管理:OS 管理计算机上运行的进程(程序)的创建、执行和终止。
    • 资源分配:OS 管理系统资源的分配和释放,如内存、I/O 设备和 CPU 时间。
    • 安全:OS 提供了控制对计算机资源的访问和保护的机制,以防止未经授权的访问。

    作业系统类型

    • 单用户、单任务:MS-DOS
    • 多用户、单任务:早期 Unix
    • 多用户、多任务:现代操作系统,如 Windows、Linux 和 macOS

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    Description

    Learn about the definition and key characteristics of an operating system, including hardware management and process management.

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