An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all of the other application programs in a computer. The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface, such as a command-line interface (CLI) or a graphical UI (GUI).

An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs.

Some important functions of an operating system are -

• Memory Management

• Processor Management

• Device Management

• File Management

  
  
  This course contains practical questions that will be very helpful for you when you give the certification exam. All our questions are prepared by industry experts who have years of experience in their fields.
  
  

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