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Ch10 檔案管理
第 11 題／共 28 題
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11. Bootstrap、Directory Structure、Page Cache、VFS
#OS-10-011
易
Bootstrap
Directory Structure
Page Cache
VFS
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Which of the following statements on I/O system is (are) true?
A
(a) For most computers, the bootstrap is stored in Non-Volatile Memory (NVM) flash memory firmware on the system motherboard and mapped to a known memory location.
B
(b) In Linux, if the requested file is not already open, the directory structure is searched to locate the file by its name. The directory structure may reside in the memory or on the storage devices.
C
(c) In Linux, page cache usually caches file in DRAM because DRAM is faster than storage devices and data can be retained in DRAM after the system powers down.
D
(d) To concurrently support multiple types of file systems, Virtual File System (VFS) layer separates file-system-generic operations from their implementation by defining a VFS interface.
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