Correct answer is option 3. to get and execute the next user-specified command.
The main function of a command interpreter, also known as a command line interpreter or shell, is to interpret and execute commands entered by a user or initiated through scripts in a computer operating system. It serves as an interface between the user and the operating system, allowing users to interact with the system by issuing commands and receiving responses or performing actions based on those commands.
The command interpreter interprets the user's input, identifies the corresponding system functions or programs, and executes them, enabling tasks such as file manipulation, program execution, system configuration, and administrative tasks. It plays a crucial role in providing a flexible and efficient means of controlling and interacting with a computer system via textual commands.