Term
| What does Virtual memory allow? |
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Definition
| a job to run while not completely in memory and to run programs that are larger than physical memory. |
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Term
| Modern OS's are ________ driven? |
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Definition
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Term
| Which two operating modes are, at the very least, required to ensure proper executing of the OS? |
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Definition
user mode
kernel mode
(supervisor, system, privileged)
mode bit indicates which mode it is in.
kernel(0) user (1) |
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Term
| When a process executes a system call, what mode is the system in? |
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Definition
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Term
| What can we use to prevent a user program from returning control to the OS? |
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Definition
| When stuck in an infinite loop, or failing to call system services. We can fix this by using a timer – set to interrupt the computer after a specified period |
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