Operating System (OS)
All of the following are task performed by the operating system except

Controlling the access that application program has to the CPU
Managing hardware on the computer
Provides an interface for user to interact with computer
Performing housekeeping task like file compression and disk defragmentation

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Operating System (OS)
Daisy chain is a device for

All of these
connecting a number of controllers to a device
connecting a number of devices to a controller
interconnecting a number of devices to a number of controllers
None of these

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