Computer Science for IGCSE & O level - Software (Section 1 - No. 23)
What is the main function of a screen saver?
To protect the screen from burn-in and display a visual when the computer is idle.
To delete temporary files.
To manage user accounts.
To protect the computer from malware.
解释
Screen savers prevent screen burn-in by displaying moving images after a period of inactivity.