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Oracle Linux 6 Advanced System Administration

QUESTION 41

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

 

A.

It is a journaling, extend-based file system.

B.

It is not supported for the/bootfile system.

C.

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

D.

It supports user and group disk quotas.

E.

It is supported only when created on Logical Volumes.


F.

It has a built-in volume manager.

 

Correct Answer: BDF

Explanation:

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

 

 

QUESTION 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?

 

A.

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

B.

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

C.

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

D.

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

 

Correct Answer: C

 

QUESTION 43

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

 

A.

runningrndc-confgen -a to generate a key that can be used by both thenamedservice and therndcutility

B.

runningrndc-confgen -a to generate a key that can be used only by thenamedservice

C.

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

D.

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

 

Correct Answer: AD

Explanation:

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

 

 

QUESTION 44

Which three statements are true about thecrashutility in Oracle Linux?

 

A.

It can analyze only dumps produced by thekdumpfacility.

B.

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

C.

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

D.

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

E.

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

 

Correct Answer: ABD

 

 

QUESTION 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 -I 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

 

Correct Answer: E

 

 

QUESTION 46

Examine theudevadmcommand:

 

udevadm info –query=all –name=/dev/sdb

 

What does this command display?

 

A.

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

B.

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

C.

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

D.

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

 

Correct Answer: D

 

 

QUESTION 47

Which three features are included in theOCFS2file system?

 

A.

online defragmentation

B.

sparse file support

C.

metadata checksums

D.

multiple cluster sizes

E.

transparent compression

F transparent encryption

 

Correct Answer: BCD

Explanation:

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

 

 

QUESTION 48

Examine the sequence:

 

# sealert -I dda34207-61fd-4de2-831d-039c79270864

 

SELinux is preventing /usr/sbin/httpd from re
ad 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?

 

A.

Relabel the file in question by using therestoreconcommand.

B.

Allowhttpdto read user content by using thesetseboolcommand.

C.

Allowhttpdto read home directories by using thesetseboolcommand.

D.

Report a bug.

E.

Generate a local policy by using theaudit2allowcommand.

 

Correct Answer: B

 

 

QUESTION 49

What does a template script set up?

 

A.

an application to run a container

B.

tailored security policy for a container

C.

Linux distributions to run in a container

D.

the look of a web application for viewing containers

 

Correct Answer: C

 

 

QUESTION 50

Which statement is true about BTRFSRAID?

 

A.

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

B.

BtrfsRAID is block device RAID.

C.

BtrfsRAID is mirroring block devices.

D.

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

 

Correct Answer: B

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