Describe, in step-by-step form, the procedure that the operating system would use to switch from one user to another in a multiuser time sharing system.

An operating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs.

Single-user operating systems have no facilities to distinguish users, but may allow multiple programs to run in tandem.

A multi-user operating system extends the basic concept of multi-tasking with facilities that identify processes and resources, such as disk space, belonging to multiple users, and the system permits multiple users to interact with the system at the same time.

A user group is a group of users or people that have similar interests or jobs with access to the specific information they might need. A role is defined as an assignment of rights and rules that a user is assigned by the administrator or superuser. Permissions involve the authorization of a user to access specific resources or files on a particular computer system or network.

Explanation:

Switching between accounts

Once your account has been set up, it's easy to switch from the account currently running on the machine to your own. If someone else is currently using Windows 10 on the machine, and you want to use it, you can click the Start button, click the icon representing the current user’s account midway down on the left side of the Start menu, then click the account to which you want to switch and type in the password.

You can, of course, also log in from the lock screen, which displays all of the user accounts on the machine.

One thing to keep in mind when several people use a PC by using separate accounts: Even when someone is not using the PC, she still remains signed into the account unless she signs out or the PC is restarted. So several people might be signed into accounts, even though only one person is actively using the PC. (This does not mean that users have any access to the others' accounts. There can be only one active account at a time; an individual user will still need to re-enter the password to see her account.)

To see which users are currently signed in, click the Start button, then click the icon representing the current user’s account midway down on the left side of the Start menu, to see all of the machine's accounts. Look underneath each account. The words “Signed in” will appear under the appropriate accounts.

What does it mean that someone is signed into their account, even if they're not currently using it? When someone is signed in, Windows 10 saves the state of that person's user account — which applications the person was running, the files they were working on and so on. That way, when he switches back to using the account, everything will be in place, and he won't have to waste time launching apps, opening files and so on