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Ch8 虛擬記憶體
第 12 題／共 47 題
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12. Page Fault、Copy-on-Write、Swap Space、TLB Miss
#OS-08-012
中
Page Fault
Copy-on-Write
Swap Space
TLB Miss
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Which of the following statements on virtual memory is (are) true?
A
(a) If the required page data is not in the memory, the user process raises a page fault and the CPU runs the page fault handler to transfer the corresponding data into the memory.
B
(b) Adopting copy-on-write during process creation allows the parent and child processes initially to share the same pages. If either process writes to a shared page, a copy of the page is created.
C
(c) In Linux, the swap space is used for pages not associated with a file (known as anonymous memory); these pages include the stack and heap for a process.
D
(d) In x86 systems, when a CPU encounters a virtual address that results in a TLB miss, the operating system performs page table walking for translating a virtual address to a physical address.
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