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HP0-651 · Question #31
HP0-651 Question #31: Real Exam Question with Answer & Explanation
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Question
What is the difference between a buffered I/O (BIO) and a direct I/O (DIO)?
Options
- AThe user must provide a buffer to perform a BIO, but not for a DIO.
- BMost I/Os to terminals are BIOs, all I/Os to disks are DIOs.
- CThe operating system copies user BIO data to a system buffer before performing the I/O.
- DBIOs are substantially faster than DIOs, but consume more memory.
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