Operating System (OS)
The operating system allows the user to organize the computer's contents in a hierarchical structure of directories that include all of the following except:

Folders
Drives
System
Files

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Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

multiplexes the inputs and updates the memory accordingly
inquires to see if a terminal has any transaction to send
decides correct alternative by analysing several ones
None of these
detects/corrects errors

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