Oracle Oracle Certifications 1Z0-105 Questions & Answers

• Question 91:

  You have a mounted mirrored btrfs file system in RAID-1 on /btrfs:

  # btrfs filesystem show Label: `Btrfs' uuid: 7bfe3239-47ee-442b-b9f8-49f88b6b1be4 Total devices 2 FS bytes used 250.46MB devid 2 size 4.88GB used 1.54GB path /dev/sdd devid 1 size 4.88GB used 1.54GB path /dev/sdc

  You found an error on one device: scrub device /dev/sdc (id 1) done scrub started at Wed Aug 21 15:33:05 2013 and finished after 6 seconds total bytes scrubbed: 250.34MB with 0 errors scrub device /dev/sdd (id2) done scrub started at Wed Aug 21 15:33:05 2013 and finished after 6 seconds total bytes scrubbed: 250.39MB with 26 errors error details: read=13 csum=13 corrected errors: 13, uncorrectable errors: 0, unverified errors: 0

  Which statements repairs the corrupted blocks?

  A. fsck.btrfs –f /dev/sdd

  B. fsck –t btrfs /btrfs

  C. btrfs scrub /dev/sdc

  D. btrfs scrub start /dev/sdd

  Correct Answer: D

• Question 92:

  Examine the D scrypt:

  syscall::read:entry,

  syscall::write:entry

  /pid == $1/

  {

  ts[probefunc] = timestamp;

  }

  syscall::read:return,

  syscall::write:return

  /pid == $1 andand ts[probefunc] != 0/

  {

  printf("%d nsecs", timestamp ?ts[probefunc]);

  }

  Which statement is true about this script?

  A. It produces aggregations of system calls made by the process whose PID is passed as a command-line argument represented by $1. You see which system calls are issued, and how many times, over a fixed interval.

  B. It produces elapsed times for reads and writes to the entry and returns DTrace probes for the process whose PID is passed as a command-line argument represented by $1.

  C. It produces elapsed times between entry and return of read and write system calls for the process whose PID is passed as the first command-line argument to the D script, represented by $1.

  D. It produces a measure of useful time spent in read and write system calls for the process whose PID is passed as a command-line argument represented by $1.

  Correct Answer: A

• Question 93:

  A container has a runaway process that is consuming all of its allotted CPU time. You want to temporarily stop this container from using any more CPU so that you can inspect it and try to correct the problem.

  Which command would you run?

  A. kill –STOP `lxc-info --pid –n `

  B. lxc-freeze –n

  C. lxc-stop –n --freeze

  D. lxc-cgroup –n cpu.shares 0

  Correct Answer: B

  Reference: http://man7.org/linux/man-pages/man1/lxc-freeze.1.html

• Question 94:

  Examine the current SELinux status: You have to meet these requirements:

  

  1.

  Network services must run in a confined domain.

  2.

  The guest user must be confined.

  3.

  The guest user must not be allowed from using the su command.

  4.

  Access to files and directories must be granted based only of the SELinux contexts.

  5.

  The SELinux configuration must be persistent across system restarts.

  6.

  Users must be able to publish private HTML content.

  You issued these commands: # setenforce enforcing # semanage login –d –s guest_u guest # setsebool –P httpd_enabled_homedirs on

  Which requirements do you meet?

  A. 1, 2, 3, 6

  B. 1, 2, 3, 4, 6

  C. 1, 2, 3, 4, 5, 6

  D. 1, 2, 3, 5, 6

  E. 2, 3, 4, 5, 6

  F. 1, 6

  Correct Answer: B

• Question 95:

  Which statement is true about udev?

  A. It is static kernel device naming scheme based on devfs.

  B. It prevents device renaming upon reboot by default.

  C. The udev configuration file is /etc/udev.conf.

  D. It is a dynamic kernel device naming scheme based on sysfs.

  Correct Answer: C

  udev expects its main configuration file at /etc/udev/udev.conf. The file consists of a set of variables and values allowing the user to override default udev values.

• Question 96:

  Which two statements about the yum-fs-snapshot plugin are true?

  A. It automatically creates file system snapshots for all file systems before running a yum transaction.

  B. It can be used to manually create file system snapshots before running a yum transaction.

  C. It can be used when the root file system is deployed on btrfs.

  D. It can be used when the root file system is deployed on an VLM volume.

  E. It is enabled by default for all types of root file systems.

  Correct Answer: AC

  Reference: http://man7.org/linux/man-pages/man1/yum-fs-snapshot.1.html

• Question 97:

  After settings up encryption for /dev/sdd1, you notice that the file system is not mounted during system

  startup.

  You suspect a configuration error in /etc/crypttab:

  # cat /etc/crypttab

  

  Assume that /etc/fstab is correct. Identify the reason why the file system is not mounted after system startup.

  A. The option field cannot be empty.

  B. The password field must contain the encrypted version of "TopSecret".

  C. The password field must contain the file name of a file containing the correct encryption password.

  D. /etc/crypttab is group readable, world readable, or both.

  E. "TopSecret" is not the correct encryption password.

  Correct Answer: A

• Question 98:

  Examine this command and its output:

  # yum history list Loaded plugins: security

  

  history list

  Which command must you use to undo the last two yum transactions?

  A. # yum history rollback 2

  B. # yum history rollback 3

  C. # yum history undo last-1

  D. # yum history undo last-3

  Correct Answer: A

• Question 99:

  Users report 403-Forbidden errors while accessing Apache manuals after you enabled SELinux. Examine the contents of /var/www/manual:

  # ls –Za /var/www/manual drwxr-xr-x. root root system_u: object_r:httpd_sys_content_t:s0 . drwxr-xr-x. root root system_u: object_r:httpd_sys_content_t:s0 .. -rw-r--r--. root root system_u: object_r:user_home_t:s0 bind.html -rw-r--r--. root root system_u: object_r:user_home_t:s0 caching.html -rw-r--r--. root root system_u: object_r:user_home_t:s0 configuring.html -rw-r--r--. root root system_u: object_r:user_home_t:s0 content-negotiation.html -rw-r--r--. root root system_u: object_r:httpd_sys_content_t:s0 convenience.map

  Identify two commands that will resolve the 403- Forbidden errors.

  A. restorecon –R /var/www/manual

  B. fixfiles relabel /var/www/manual

  C. chcon –R –t httpd_sys_content_t /var/www/manual

  D. fixfiles check /var/www/manual

  Correct Answer: CD

• Question 100:

  Which three statements are true about the architecture and capabilities provided by SAMBA when installed on an Oracle Linux server?

  A. The Oracle Linux server may act as a SAMBA server.

  B. Printers on the Oracle Linux system may be shared with Windows clients.

  C. SAMBA uses UDP to communicate with Windows servers.

  D. Printers on a Windows system may not be shared with oracle Linux clients.

  E. The Oracle Linux Server may act as a SAMBA client.

  Correct Answer: BCE