Which of the following is NOT a function of an operating system ?

1. Managing the computer's resources, such as the central processing unit, memory, disk drives, and printers.
2. Formatting a word document.
3. Establishing a user interface.
4. Executing and providing services for applications software.

An operating system manages

1. Memory
2. Processes
3. Disks and I/O Devices
4. All the above

In which of the following OS types, the response type is very crucial ?

1. Unix operating system
2. Real Time OS
3. Time sharing OS
4. Single user OS

The component program of an OS, which is responsible for interacting with user is called

1. Interactive component
2. User environment
3. Operating environment