201-450 | The Renewal Guide To 201-450 braindumps

Question No: 1

Which files are updated as devices are mounted and unmounted to provide information on the currently

mounted devices and the options used? (Choose TWO correct answers.)

A. /proc/dtab

B. /etc/mtab

C. /etc/fstab

D. /proc/mounts

E. /proc/devices

Answer: BD

Question No: 2

How can the kernel parameter for the maximum size of the shared memory segment (shmmax) be changed to 2GB (2147483648 Bytes) on a running system? (Choose TWO correct answers.)

A. Edit /etc/shmmax and set the parameter to 2147483648.

B. sysctl shmmax=2147483648

C. sysctl kernel.shmmax=2147483648

D. echo 2147483648 > /proc/sys/kernel/shmmax

E. export kernel.shmmax=2147483648

Answer: CD

Question No: 3

In case the file containing the Linux kernel is lost, what happens when the system is booting?

A. The system starts normally since the bootloader copies the kernel to the master boot record of the hard disk.

B. Instead of the kernel, the initramfs is loaded and instructed to mount the root filesystem and reinstall the kernel from the original package or from source.

C. The bootloader mounts the root filesystem read-only and launches /bin/sh directly in order to allow the administrator to reinstall the kernel.

D. Without a kernel a system cannot boot and, depending on the bootloader, an error is displayed.

Answer: D

Question No: 4

When is historical data of resource usage important? (Select THREE correct answers.)

A. Predicting when resources will need to be increased.

B. Selecting a computer vendor.

C. Identifying processes killed during out of memory occurrences.

D. Diagnosing capacity problems.

E. Troubleshooting a software problem.

Answer: ADE

Question No: 5

In the following output from top, which processes contribute to the percentage of time that the CPU spends in the state of wa?

Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie

Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st

A. Processes waiting for user interaction.

B. Processes that were already closed and are waiting to be launched again.

C. Processes that have not been scheduled yet because they haven't been fully loaded into RAM or are in swap.

D. Processes waiting for IO operations to complete.

Answer: D

Question No: 6

The main configuration file for autofs has this entry:

/home /etc/auto.home

What is the meaning of the /etc/auto.home file?

A. It has the indirect maps for the mounting of file systems.

B. It has configuration information, such as passwords and keys, for the remote file server.

C. It has configuration information on settings for the /home mount point.

D. It is the holds the SSL key to allow authentication to the remote file server.

Answer: A

Question No: 7

Which of the following command sequences can be used to extract files contained in a initramfs file (/boot/initramfs) which is used by the kernel at boot time?

A. cp /boot/initramfs /tmp/initramfs.gz; gzip -c /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd

/tmp/initramfs.dir ; cpio -i < /tmp/initramfs

B. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd

/tmp/initramfs.dir ; cpio -i < /tmp/initramfs

C. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mount /tmp/initramfs /mnt/ -o loop -t initramfs

D. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd

/tmp/initramfs.dir ; cpio -e /tmp/initramfs

E. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mount /tmp/initramfs /mnt/ -o loop -t initrd

Answer: B

Question No: 8

After installing a compiled kernel, it can not find any modules that are needed to be loaded. What make target was likely missed while installing the kernel?

Answer:

make modules_install, modules_install

Question No: 9

What is the minimum number of disks required in a fully redundant RAID5 array?

A. 1

B. 2

C. 3

D. 4

E. 5

Answer: C

Question No: 10

What information does the file modules.dep provide?

A. A list of all modules, compiled or not, that are available to the kernel.

B. A list of modules trusted by the installed kernel.

C. A list of devices and their module name.

D. A list of all compiled modules and their dependencies.

E. A list of modules the kernel needs to run.

Answer: D