What is the difference between a buffered I/O (BIO) and a direct I/O (DIO)?

Question

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.

• A
  7% (2)
• B
  4% (1)
• C
  85% (23)
• D
  4% (1)

No community discussion yet for this question.