Which of the following statements is incorrect in relation to example file systems a) with CD ROM file system files cannot be freed or added after the disk has been manufactured b) Joliet extensions were designed to allow UNIX file systems to be copied to CD ROM c) most digital cameras, and MP3 players use the MS DOS file system d)the UNIX V7 file system is in the form of a tree starting at the root directory, with the addition of links, forming a directed acyclic graph With respect to principles of I O software, what are the ways I O can be done from the point of view of the operating system a)programmed I O, interrupt driven I O, device independence b) programmed I O, interrupt driven I O, synchronous blocking c) interrupt driven I O, I O using DMA, uniform interfacing I O d) programmed I O, interrupt driven I O, I O using DMA Which of the following statements is incorrect with respect to I O software layers a)for most I O interrupts are an unpleasant fact of life and cannot be avoided b) each I O device attached to a computer needs some device specific code for controlling it, called the device driver it is generally written by the operating system manufacturer and comes with the operating system c) if disks, printers, keyboards, and so on, are all interfaced in different ways, every time a new device comes along, the operating system must be modified for the new device hence a uniform interface is preferable d) a small portion of the I O software consists of libraries linked together with user programs (and so, it is located in the user space)

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Which of the following statements is incorrect in relation to example file systems?

a)	with CD-ROM file system files cannot be freed or added after the disk has been manufactured

b)	Joliet extensions were designed to allow UNIX file systems to be copied to CD-ROM

c)	most digital cameras, and MP3 players use the MS-DOS file system

d)the UNIX V7 file system is in the form of a tree starting at the root directory, with the addition of links, forming a directed acyclic graph

With respect to principles of I/O software, what are the ways I/O can be done from the point of view of the operating system?

a)programmed I/O, interrupt driven I/O, device independence

b)	programmed I/O, interrupt driven I/O, synchronous blocking

c)	interrupt driven I/O, I/O using DMA, uniform interfacing I/O

d)	programmed I/O, interrupt driven I/O, I/O using DMA

Which of the following statements is incorrect with respect to I/O software layers?

a)for most I/O interrupts are an unpleasant fact of life and cannot be avoided

b)	each I/O device attached to a computer needs some device-specific code for controlling it, called the device driver; it is generally written by the operating system manufacturer and comes with the operating system

c)	if disks, printers, keyboards, and so on, are all interfaced in different ways, every time a new device comes along, the operating system must be modified for the new device hence a uniform interface is preferable