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Operating System File and IO management
(5 marks). A file system uses index allocation. The system keeps in main memory only the index block that contains the pointer to the last block read. Other index blocks are in disk. Each index block contains pointers to 127 file blocks, plus a pointer to the next index block (i.c., using linked scheme). Assume the last accessed block was block 200, and the next block to read is block 50 . Compute how many physical blocks must be accessed to read block 50 . Explain your answer.