If there are n users actively requesting service at one time, each user will only see on the average 1/ n of the effective computer capacity, not counting OS overhead. Why the response time on a time-sharing system can be similar to that on a dedicated computer?

Which of the following best describe how the depth-limited search works. a normal depth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but values above a specific value will be ignored. a normal depth-first search is performed but values above a specific value will be ignored.