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Oracle Linux 6 Advanced System Administration

Question No: 41

Which three statements are true about support for the XFS file system in Oracle Linux?

  1. It is a journaling, extend-based file system.

  2. It is not supported for the/bootfile system.

  3. It is supported for the root (/) file system.

  4. It supports user and group disk quotas.

  5. It is supported only when created on Logical Volumes.

  6. It has a built-in volume manager.

Answer: B,D,F

Reference:http://docs.oracle.com/cd/E37670_01/E37355/html/ol_about_xfs.html

Question No: 42

Examine the output of the command: lssubsys -am

devices freezer net_cls perf_event hugetlb

cpuset, cpu, memory

/cgroup/A cpuacct

/cgroup/cpuacct blkio

/cgroup/B

Now the lssubsys command is executed and new output is generated: ssubsys -am

devices perf_event hugetlb

cpuset, cpu, memory

/cgroup/A cpuacct

/cgroup/cpuacct freezer, net_cls cgroup/C

blkio

/cgroup/B

Which command or sequence of commands is correct?

  1. mkdir -p /cgroup/C; mount -t cgroup -o freezer C /cgroup/C; mount -t cgroup -o remount, freezer, net_cls C /cgroup/C

  2. mkdir -p /cgroup/C; mount -o freezer, net_cls cgroup /cgroup/C

  3. mkdir -p /cgroup/C; mount -t cgroup -o freezer freezer /cgroup/C; mount -tcgroup -o net_cls net_cls /cgroup/C

  4. mkdir -p /cgroup/C; mount -t cgroup -o freezer, net_cls /cgroup/c

Answer: C

Question No: 43

Which two options prevent unauthorized access to thenamedservice from therndcutility on Oracle Linux?

  1. runningrndc-confgen -ato generate a key that can be used by both thenamedservice and therndcutility

  2. runningrndc-confgen -ato generate a key that can be used only by thenamedservice

  3. runningrndc -k /etc/rndc.keyto generate a key to be used only by therndcutility

  4. the presence of/etc/named.confwith the lineinclude “/etc/rndc.key”; to allow thenamedservice to check for a matching key from therndcutility

Answer: A,D

Reference:http://www.oracle.com/us/technologies/linux/suse-linux-to-oracle-linux-wp- 1898710.pdf(page 49)

Question No: 44

Which three statements are true about thecrashutility in Oracle Linux?

  1. It can analyze only dumps produced by thekdumpfacility.

  2. It can analyze the state of the system while it is running.

  3. It can analyze only dumps produced by theLinux Kernel Crash Dumps (LKCD)facility.

  4. It can analyze the state of the system after a kernel crash has occurred by using the memory image file produced from the crash.

  5. Thekernel-debuginfoandkernel-uek-debuginfopackages are not included in the Oracle Linux distribution.

    Answer: A,B,D

    Question No: 45

    Examine the listof requirements for an XFS file system:

    1. Its label must be/xfs1.

    2. It must mount automatically during system startup.

    3. The user data must be stored on/dev/sdh1.

    4. The journal data must be stored on/dev/sdd1.

    5. The journal must be 4GB in size.

    6. It must contain a real-time section.

    7. Its block size must be 4096 bytes. You execute the command:

      # mkfs -t xfs -L /xfs1 -l logdev=/dev/sdd1 -d size=4g /dev/sdh1 Which requirements do you meet?

      A. 1, 3, 4, 7

      B. 1, 2, 3, 4, 7

      C. 1, 3, 4

      D. 1, 3, 4, 5, 7

      E. 1, 3, 4, 5, 6, 7

      F. 1, 2, 3, 4, 5, 6, 7

      Answer: E

      Question No: 46

      Examine theudevadmcommand:

      udevadm info -query=all -name=/dev/sdb What does this command display?

      1. the device tree, and all properties maintained insysfsfor all parent devices in the device tree for the/dev/sdbdisk device

      2. all properties maintained insysfsfor the/dev/sdbkernel device, excluding parent devices

      3. all properties maintained indevfsfor the/dev/sdbkernel device, excluding parent devices

      4. the device tree, and all properties maintained indevfsfor the/dev/sdbdevice, including properties of all parent devices in the device tree for the/dev/sdbdisk device

Answer: D

Question No: 47

Which three features are included in theOCFS2file system?

  1. online defragmentation

  2. sparse file support

  3. metadata checksums

  4. multiple cluster sizes

  5. transparent compression F transparent encryption

Answer: B,C,D

Reference:http://www.oracle.com/us/technologies/linux/025995.htm

Question No: 48

Examine the sequence:

# sealert -l dda34207-61fd-4de2-831d-039c79270864 SELinux is preventing /usr/sbin/httpd from read access on the file /var/www/manual/new_features_2_2.html.

***** Plugin restorecon (85.9 confidence) suggests ***** If you want to fix the label.

/var/www/manual/new_features_2_2.html default label should be httpd_sys_content_t. Then you can run restorecon.

Do

# /sbin/restorecon -v /var/www/manual/new_features_2_2.html

***** Plugin catchall_boolen (7.33 confidence) suggests ***** If you want to allow httpd to read user content

Then you must tell SELinux about this by enabling the ‘httpd_read_user_content’ boolean. You can read ‘user_selinux’ man page for more details.

Do

setsebool -P httpd_read_user_content 1

What action must you take for fix this problem?

  1. Relabel the file in question by using therestoreconcommand.

  2. Allowhttpdto read user content by using thesetseboolcommand.

  3. Allowhttpdto read home directories by using thesetseboolcommand.

  4. Report a bug.

  5. Generate a local policy by using theaudit2allowcommand.

Answer: B

Question No: 49

What does a template script set up?

  1. an application to run a container

  2. tailored security policy for a container

  3. Linux distributions to run in a container

  4. the look of a web application for viewing containers

Answer: C

Question No: 50

Which statement is true aboutBTRFSRAID?

  1. BtrfsRAID is a multi-disk software RAID providing the same functionality as a software RAID created using themdadmcommand.

  2. BtrfsRAID is block device RAID.

  3. BtrfsRAID is mirroring block devices.

  4. BtrfsRAID just ensures that for every block, there are “x” number of copies.

Answer: B

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