OPERATING SYSTEM: Operating system is system software that is designed to operate computer hardware. An operating system is an interface between the user and the hardware. It is that system that is used to operate anything it may be a computer system or mobile phones, laptops, or Atm machines. Without an operating system, a computer cannot operate. The computer operating system manages all other programs on the machines. An operating system is the first program or thing that is loaded into the main memory when we start/boot a computer. An operating system is software that manages all the resources such as file management, device management, CPU management, etc. OS is the set of programs that helps in managing hardware and software resources of a computer system.
COMPONENTS OF THE OPERATING SYSTEM:
There are mainly two components of the operating systems namely Kernal and Shell.
KERNAL: KERNAL is that part of the OS that is responsible for managing all the resources of the hardware.
SHELL: Shell is command line interface. It is that point of the OS which interact between the user and services of the hardware.
OPERATING SYSTEM TYPES:
- SINGLE-USER, SINGLE TASK: Single user operating system is an operating system that allows a single user to perform only one task at a time. E.g. Ms DOS, Palm OS, Andriod OS, Windows 95 etc.
- MULTI-USER, MULTI-TASKING: Multi-tasking os is an operating system that supports more than one task at a time. E.g. UNIX, Mainframe, Linux, windows servers, Macintosh.
- REAL-TIME OPERATING SYSTEM: Real-time operating system is one the OS which is used in real-time. This is works and processes for a fixed time and a small quantum of time. E.g. Fax Machines, Printers, Scanners, Routers, Robots, and Embedded OS.
- SINGLE USER, MULTI-TASKING OS: This operating system is a system that is primarily used in laptops and desktops. This allows a single user to run multiple applications at a time: E.g. Ms. Windows, Appless’ Macintosh OS.
BOOTING: It is the process of loading os into main memory is called booting. It is the process when we turn on the computer system it takes time to display on the main screen of the computer, that particular time os takes time to loaded into the main memory. In the booting process operating system is loaded into the main memory i.e RAM and desktop screen display.
BOOTING PROCESS: When we press the power on button and then power supply on than CPU sends the message to ROM, ROM sends a message to POST, POST sends a message to ROM, ROM sends a message to BIOS, BIOS sends a message to CMOS, CMOS sends a message to RAM.(CPU-ROM-POST-BIOS-CMOS-RAM)
BOOTING is the process of starting or restarting a computer.
BOOTING TYPES: Booting is of two types namely Cold Booting and Warm Booting.
COLD BOOTING: Cold booting take place when we start a computer.
WARM BOOTING: Warm booting refers to the restarting system using restart button.
LINUX OS: Linux is an open source software because the source code of Linux is freely available to everyone. Linux was developed by Linus Torvalds. Linux is based on C language. E.g. Ubuntu, Red hat, Linux Mint, Debian etc.
UNICS(UNIX OS): (Unicode Information Computing System Source) Unix code is not available to the public. Ken Thompson and Dennis Ritchie developed Unix. Unix is written in C language. E.g OSX, BSD, Solaris, AIX, IRIX, etc.
START MCQs/QUIZ/MOCK TEST
Results
#1. Which of the following is an operating system for mobile phones?
#2. Creating a job queue is a function of which one?
#3. Operating system is which type of software?
#4. Your personal files and folders goes in
#5. Which one is window Explorer?
#6. The memory resident portion of the operating system is called
#7. Which of the following uses a handheld operating system?
#8. Which of the following is an example of a MOBILE operating system?
#9. What is the full form of IBM?
#10. Which one is Microsoft OS was?
#11. Which one is the example of real time operating sytem?
#12. What is the full form of CUI?
#13. Name the interface between user and hardware?
#14. Verification of login name and its password is known as ?
#15. Select open source operating system among given options?
#16. Operating system work between which one?
#17. Which of the following programs is loaded first when starting a computer?
#18. The category of operating system that you mostly likely have running on your desktop or laptop computer at home is a ......... operating system.
#19. Name the latest version of Android Operating System?
#20. First system was created by which one?
#21. The operating system is the most common type of ......... software?
#22. Who is the first programmer of computer?
#23. What is the full form of RTGS?
#24. Code of Android OS was written in which programming language?
#25. NOS stands for ?
#26. When your turn on the computer, the boot routine will perform this test?
#27. Operating system loaded in which computer memory?
#28. Which of the following is an example of operating system?
#29. ............... is a set of computer program used on a computer to help perform tasks.
#30. Microsoft office is an example of ?
#31. A computer program that converts an entire program into machine language at one time is called ?
#32. MS DOS is which type of operating system?
#33. CUI is based on which one?
#34. Only mouse is used in which type of operating system?
#35. Which of the following are the functions of operating system?
#36. Name the founder of Android operating system?
#37. The process of restarting a computer is called?
#38. Which interface of operating system is more user friendly?
#39. The ......... operating system was initially created by Dennis Ritchie in the early 1970s at AT&T's Bell Labs.
#40. ME, stands for in Windows ME?
#41. Which of the these is the name of Multi User Multi Tasking Operating System?
#42. The instructions that tell a computer how to carry out the processing tasks are referred to as computer.......
#43. An antivirus application is an example of
#44. Name the latest operating system of Microsoft?
#45. A computer cannot boot, if it does not have an?
#46. Name the latest version of of MAC operating system?
#47. Which of the following is an Open Source Software?
#48. The computers were programmed using which one?
#49. DOS file names are restricted to which one?
#50. During the boot process, the ......... looks for the system files?