Which of the following is a function commonly provided by the operating system?

Which of the following is a function commonly provided by the operating system?

• A. Managing resources
• B. Running applications
• C. Providing user interface
• D. Data encryption

Answer: (A)

The key idea here is that the operating system’s main job is to coordinate and control the computer’s resources so multiple programs can run smoothly at the same time. It decides who gets the CPU and when, how much memory each process can use, and how devices like disks, keyboards, and networks are shared and accessed. This resource management—scheduling, memory management, and I/O handling—keeps the system stable and efficient, which is why it’s the best fit for what an OS provides. Running applications happens because the OS creates the environment and resources they need, but that outcome stems from effective resource management rather than being a separate core function on its own. A user interface and data encryption can be provided by an OS as features, but they’re not as central to the operating system’s role as coordinating resources across the system.

The key idea here is that the operating system’s main job is to coordinate and control the computer’s resources so multiple programs can run smoothly at the same time. It decides who gets the CPU and when, how much memory each process can use, and how devices like disks, keyboards, and networks are shared and accessed. This resource management—scheduling, memory management, and I/O handling—keeps the system stable and efficient, which is why it’s the best fit for what an OS provides.

Running applications happens because the OS creates the environment and resources they need, but that outcome stems from effective resource management rather than being a separate core function on its own. A user interface and data encryption can be provided by an OS as features, but they’re not as central to the operating system’s role as coordinating resources across the system.