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1 OPERATING SYSTEMS MCQS

Interface used in DOS is called ?

  • Command-Line Interface (CLI)
  • Graphical User Interface (GUI)
  • Application Programming Interface (API)
  • Scripting Interface (SI)
Correct Answer: A. Command-Line Interface (CLI)

Detailed Explanation

DOS (Disk Operating System) uses a Command-Line Interface, also known as CLI. In this type of interface, users interact with the computer by typing text commands. There are no graphical elements like buttons, windows, or icons. Instead, users must know the correct commands and their syntax to perform tasks such as creating files, copying folders, running programs, or managing system settings.


For example, in DOS, if a user wants to display the list of files in a directory, they would type the command dir and press Enter. The system then executes the command and shows the result in plain text format.

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