Which allocation method gives each file an index block containing pointers to all its data blocks?
Correct answer D. Indexed allocation
Explanation
Indexed allocation gathers all the block pointers for a file into an index block, so the i-th block is found by reading the i-th pointer, giving efficient direct access without external fragmentation. Linked allocation instead stores a pointer in each data block, so reaching a block means following the chain. UNIX inodes use a multilevel form of indexed allocation with direct and indirect pointers.
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