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A ____ can be used to prevent a user program from never returning control to the operating system. A) portal B) program counter C) firewall D) timer
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A ____ can be used to prevent a user program from never returning control to the operating system. A) portal B) program counter C) firewall D) timer

User FFMG
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Answer:

timer

Step-by-step explanation:

User Viktor Livakivskyi
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