Operating Systems

Operating Systems

1. They help computers run smoothly by allowing multiple tasks at once and making it easy for users to interact with the computer. Security Analyst: A person who protects computers by setting up firewalls and security rules.

   • Security Analyst: A person who protects computers by setting up firewalls and security rules.
   • Hardware: The physical parts of a computer, like the CPU and memory, that the operating system manages.

2. Hardware: The physical parts of a computer, like the CPU and memory, that the operating system manages.

   • Binary Language: The way computers talk using just 0s and 1s; the operating system translates our commands into this language.
   • Security Role of OS: Helps keep files safe and controls who can access what on the computer.
   • Mobile Operating System: Android is an example of an operating system used on smartphones and tablets.
     • Early Computers: In the past, computers could only run one program at a time, unlike today’s computers.
     • Main Job of an OS: Acts like a middleman between the user and the computer hardware, managing resources and providing a user-friendly experience.
     • Multitasking: Modern operating systems let you run several apps at the same time.
       • Linux: A type of operating system that is popular in computer security because it is flexible and powerful.
         • User Interfaces
           • Graphical User Interface (GUI): This is what most people see on their computers, with icons and pictures to click on.
             • Start Menu: A menu in the GUI that helps you find and open programs quickly.
           • Command-Line Interface (CLI): A text-based way to control a computer, often used by advanced users for more control.
             • Desktop: The main screen area on a computer where you see your icons and shortcuts.
           • Task Execution in GUI: Makes it easier to interact with the computer using pictures and buttons
             • Programming Concepts
               • Function: A reusable piece of code that does a specific job in programming.
                 • Variable: A place in programming where you can store information, like a score in a game.
                   • Sprite Properties: Features of characters or objects in games that can be changed, like whether they are visible.
                     • Creating a Sprite: You use commands like createSprite() to make characters or objects in a game.
                       • Historical Context
                         • The game released in 1980 that became a cultural icon and one of the most popular arcade games is Pac-Man.
                         • The game considered one of the first digital computer games is Pong.