Operating System (OS)
To save your computer from viruses you will do

Scan the removable disk before using it
Install antivirus software and run it
Make physical safe for the removal disk
All of these

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Operating System (OS)
Daisy chain is a device for

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

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Operating System (OS)
Operating system

All of these
provides a layered, user-friendly interface
None of these
enables the programmer to draw a flowchart
links a program with the subroutines it references

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