Compare Lock, Log off, Sleep, Shut down, and Restart. Explain why choosing among them matters when work is open.

### Why this is right These choices differ in whether they block access, end your user session, or change the computer’s power state. When work is open, that difference matters: locking or sleeping generally leaves the session in place, while logging off, shutting down, and restarting close it, so unsaved changes may be lost. ### The concept A **user session** is the set of programs and files open under your account while you use the computer. **Lock** blocks someone else from using that session without ending it, so your programs remain open. **Log off** ends your session but leaves the computer running; open programs close, so save your work first. **Sleep** puts the computer into a low-power state while keeping your session available to resume. **Shut down** powers the computer off, while **restart** closes the current session and starts the computer again. | Choice | Access | Session and power | |---|---|---| | Lock | Blocks access to your session | Session stays open; computer remains on | | Log off | Ends your access to the session | Session ends; computer stays on | | Sleep | Session is unavailable until wake | Session is kept; computer uses low power | | Shut down | Computer is off | Session ends | | Restart | Computer starts again | Session ends, then the computer starts | ### What a good answer covers - Lock restricts access but keeps the user’s session open. - Log off ends the session; it does not itself power off the computer. - Sleep reduces power use while keeping the session available to resume. - Shut down powers off, while restart closes the session and starts the computer again. - Save open work before choosing an option that ends the session. ### Terms - **Lock**: A state that blocks access to your open user session without ending it. - **Log off**: To end your user session and close its open programs. - **Sleep**: A low-power state that keeps the session available to resume. - **Shut down**: To turn the computer off and end the session. - **Restart**: To close the current session and start the computer again. - **User session**: The programs and files open under your account while you are using the computer. ### Remember Lock or sleep to return to the same open session; save your work before logging off, shutting down, or restarting.