201-450 Free Practice Test

Why is the root file system mounted read-only during boot and remounted with write permission later on?

1. A. Because if problems with the root file system are detected during the boot, fsck can be run, without risk of damage.
2. B. Because this way crackers cannot collect information about root with boot sniffers.
3. C. To avoid writing to the disk, unless the root password is known.
4. D. To avoid other operating systems overwriting the Linux root partition.
5. E. Because the disk has its own write protection that cannot be changed by the operating system.

Correct Answer: A

In capacity planning exercises, which tools assist in listing and identifying processes of interest? (Choose TWO correct answers.)

1. A. acpid
2. B. lsof
3. C. pstree
4. D. telinit

Correct Answer: BC

What is the functionality that PXE provides?

1. A. The ability to boot a computer using its network interface.
2. B. The ability to launch an remote X11 desktop on a computer.
3. C. The ability to verify a system's configuration after completing the boot process.
4. D. The ability to verify a system's configuration before completing the boot process.

Correct Answer: A

The IDE hard drive /dev/hda does not have DMA enabled. Which command must be run to enable DMA on it?

1. A. hdparm -d /dev/hda
2. B. hdparm --dma /dev/hda
3. C. hdparm --dma /dev/hda1
4. D. hdparm -d /dev/hda1
5. E. hdparm -d 1 /dev/hda

Correct Answer: E

What keyword is missing in the following line from /etc/fstab in order to make a USB flash device writeable by the user fred when mounted:
/dev/sda1 /mnt/usbflash vfat defaults,users, ______ =fred,umask=022, 0 0
(Provide the option name only without any settings)
Solution:
uid

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A