Computer 1) What is user interface and important part of any OS?

2) Where do we use multiuser OS?

3) What is single user OS? Define it's types with examples.

4) Why is OS called a system rather than a software?

5) Define any too common OS that we use in our Day-to-Day life. ​

1),A user interface (UI) refers to the part of an operating system, program, or device that allows a user to enter and receive information.

2)Multi-user operating systems were originally used for time-sharing and batch processing on mainframe computers.

3) An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System. Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS-DOS, Palm OS, etc.

4)If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications. ... The OS manages all the other programs in a computer. System software is used to manage the computer itself.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?