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    Question

    In file systems, which allocation method results in the

    maximum random access performance?
    A Contiguous Allocation Correct Answer Incorrect Answer
    B Linked Allocation Correct Answer Incorrect Answer
    C Indexed Allocation Correct Answer Incorrect Answer
    D Clustered Allocation Correct Answer Incorrect Answer
    E Multi-Level Indexed Allocation Correct Answer Incorrect Answer

    Solution

    Contiguous Allocation stores all blocks of a file in consecutive sectors on the disk, providing maximum random access performance. Since the file blocks are physically adjacent, the file system can calculate the location of any block using simple arithmetic, enabling direct access in constant time. This method minimizes seek time and latency, making it highly efficient for files that require frequent random access, such as databases or multimedia applications. However, it suffers from fragmentation and requires predefining the file size, limiting its practical use in dynamic environments. Why Other Options Are Incorrect: 2. Linked Allocation: Uses pointers to link blocks, causing sequential access and higher overhead for random access. 3. Indexed Allocation: Employs an index block to store pointers, improving random access compared to linked allocation but still involves additional overhead to access the index. 4. Clustered Allocation: Groups blocks into clusters; improves performance slightly but not as effective as contiguous allocation for random access. 5. Multi-Level Indexed Allocation: Adds levels to the index structure, improving scalability but increasing the overhead for random access. Contiguous allocation is unparalleled in random access speed but requires careful management to handle fragmentation and space allocation issues effectively.

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