Operating System (OS)
You can switch from one program to another by clicking within the desired program's icon from the

Application icon from taskbar
Folder
None of above
Application icon on desktop

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Operating System (OS)
The LRU algorithm

None of these
pages out the first page in a given area
pages out pages that have been used recently
pages out pages that have been least used recently
pages out pages that have not been used recently

ANSWER DOWNLOAD EXAMIANS APP