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Question 1:

Examine the parameters shown using the sysctl command relating to panic situations: [[email protected] etc]# sysctl 璦 |grep panic |grep -v hung kernel.panic = 0 kernel.panic_on_oops = 0 kernel.softlockup_panic = 0 kernel.unknown_nmi_panic = 0 kernel.panic_on_unrecovered_nmi = 0 kernel.panic_on_io_nmi = 0 kernel.panic_on_oom = 2 [[email protected] etc]# sysctl 璦 |grep hung

kernel.hung_task_panic = 0 kernel.hung_task_chek_count ?4194304 kernel.hung_task_timeout_secs = 120 kernel.hung_task_warnings = 10

Which two statements are true about system behavior?

A. The kernel delays panic for a few seconds if a bug is encountered to allow the klogd kernel logging daemon to log the oops output.

B. The kernel panics if a kernel thread sleeps in the TASK_UNINTERRUPTABLE state for more than 120 seconds.

C. The kernel attempts to continue if a bug is encountered.

D. The kernel always panics if an out-of-memory condition arises.

E. The kernel tries to kill some memory-consuming processes to avoid a panic if an out-of- memory condition arises.

F. The kernel panics if a user thread sleeps in the TASK_UNINTERRUPTABLE state for more than 120 seconds.

Correct Answer: BF


Question 2:

After creating empty mount point /xfs1, you execute the command:

# mkfs –t xfs –L /xfs1 –l logdev=/dev/sdd1 /dev/sdh1

Which two statements are true about the effects of executing the mkfs command?

A. It fails if there is an existing XFS file system on /dev/sdh1.

B. It fails if there is an existing XFS log on /dev/sdd1.

C. It fails if there is an existing XFS file system on /dev/sdd1.

D. It fails because there is no size specified for the XFS log.

E. The xfs1 file system is mounted automatically during system startup.

F. It creates and mounts the /xfs1 file system.

Correct Answer: DF


Question 3:

Which two statements are true about recursive nameservers that are supported by Oracle Linux?

A. They may be authoritative.

B. They may forward requests to authoritative name servers on some occasions.

C. They may be primary nameservers.

D. They cache replies from previous name resolution requests.

E. They may be secondary nameservers.

Correct Answer: BC


Question 4:

While copying a file to the /users file system, which is located on /dev/sdd1, you receive an error:

$ cp /etc/oratab /users/oracle cp: cannot create regular file `/users/oracle/oratab\’: Disk quota exceeded You examine your assigned quota as shown: $ quota -q Disk quotas for user oracle (uid 500):

Which option represents the reason for receiving the Disk quota exceeded error?

A. The oracle user has reached its block quota.

B. The oracle user exceeded its file quota five days ago.

C. The oracle user has reached a group quota limit.

D. The /users file system is full.

E. The oracle user exceeded its block quota six days ago.

Correct Answer: C


Question 5:

For which domain or domains does the default cache-only nameserver have a list of authoritative servers in the /var/named/named. ca file?

A. the domain to which the cache only nameserver belongs

B. the root domain

C. the domains to which the local DHCP servers belong

D. the domains to which the local DNS servers belong

Correct Answer: B


Question 6:

Examine the udevadm command:

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

What does this command display?

A. the device tree, and all properties maintained in sysfs for all parent devices in the device tree for the /dev/sdb disk device

B. all properties maintained in sysfs for the /dev/sdb kernel device, excluding parent devices

C. all properties maintained in devfs for the /dev/sdb kernel device, excluding parent devices

D. the device tree, and all properties maintained in devfs for the /dev/sdb device, including properties of all parent devices in the device tree for the /dev/sdb disk device

Correct Answer: D


Question 7:

Which two parameters are valid networking modes for a Linux container (LXC)?

A. veth

B. bridged

C. nat

D. macvlan

E. routed

Correct Answer: BC


Question 8:

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 /boot file 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

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


Question 9:

Identify the two commands that can be used to set SELinux file labels back to their default values.

A. chcon

B. fixfiles

C. semanage fcontext

D. restorecon

E. matchpathcon

F. opdate_selinux

Correct Answer: AD


Question 10:

Which statement describes the default network set up by an Oracle template script?

A. The container is isolated from the network.

B. A veth device is added to libvirt\’s virbr0 bridge.

C. A macvlan device enables DHCP from the host\’s network.

D. A private interface is routed to Open vSwitch.

Correct Answer: B

By default, the lxc-oracle template script sets up networking by setting up a veth bridge. In this mode, a container obtains its IP address from the dnsmasq server that libvirtd runs on the private virtual bridge network (virbr0) between the container and the host. The host allows a container to connect to the rest of the network by using NAT rules in iptables, but these rules do not allow incoming connections to the container. Both the host and other containers on the veth bridge have network access to the container via the bridge.


Question 11:

Consider a cgroup configuration in the /etc/cgconfig.conf file:

mount {

cpuset = /cgroup/A;

cpu = /cgroup/A;

cpuacct = /cgroup/cpuacct;

}

group A1 {

perm {

admin {

uid = root;

gid = wheel;

}

task {

uid = root;

gid = users;

}

}

cpuset {

cpuset.mems=”0″;

cpuset.cpus=”0″;

}

cpu {

cpu.shares=”5″;

}

}

group A2 {

perm {

admin {

uid = root;

admin {

uid = root

gid = root;

}

task {

uid = root;

gid = users;

}

}

cpuset {

cpuset.mems=”0″;

cpuset.cpus=”1″;

}

cpu {

cpu.shares=”5″;

}

}

Which two statements are true?

A. Two cgroup hierarchies and three subsystems are defined; cgroup A1 and A2 are located in the same sgroup hierarchy.

B. Two cgroup hierarchies and three subsystems are defined; cgroup A1 and A2 are located in different cgroup hierarchiers.

C. Three cgroup hierarchies and three subsystems are defined; cgroup A1 and A2 are located in the same sgroup hierarchy.

D. Three cgroup hierarchies and three subsystems are defined; cgroup A1 and A2 are located in different cgroup hierarchiers.

E. Any user who is a member of the users group is allowed to move his or her own tasks from the root cgroup to cgroup A1 or cgroup A2.

F. Any user who is a member of the users group is allowed to execute tasks in cgroups A1 and A2 and change the cpu.shares parameter in cgroups A1 and A2.

Correct Answer: BD


Question 12:

What statement is true about udev?

A. It uses predefined kernel devices in /dev for all combinations of that may be connected to a system to support dynamic device name assignment.

B. It dynamically creates kernel devices for only those devices that are connected.

C. It produces persistent device names for all devices.

D. Its configuration is based on device properties and attributes maintained in devfs.

Correct Answer: B

Reference: http://www.linuxfromscratch.org/lfs/view/development/chapter07/udev.html


Question 13:

Which three statements are true about an OpenLDAP server?

A. /etc/openldap.conf is the main configuration file for the LDAP server.

B. LDAP entries are stored in a flat namespace.

C. It can be used to store users and groups.

D. In can be used to store hostnames and their IP addresses.

E. It can replicate entries synchronously to another OpenLDAP server.

Correct Answer: ABC


Question 14:

Identify the minimum required steps to configure an NIS master.

1.

Ensure that the yptools, ypbind, and ypserv RPMs are installed.

2.

Configure and set the NIS domain name.

3.

Start the ypserv service.

4.

Start the ypxfrd service.

5.

Start the yppasswdd service

6.

Run ypinit -m

7.

Start the ypbind service

A. 1, 2, 3, 6

B. 1, 2 , 3, 6, 7

C. 1, 2, 3, 4, 6, 7

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

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

Correct Answer: B

Reference: https://pashasysadm.wordpress.com/2014/06/16/nis-master-client-server-configuration-setup/


Question 15:

Which three types of output may be obtained from commands from the crash utility in Oracle Linux?

A. kernel data structures

B. information about all open and closed files

C. kernel symbol names

D. information about all mounted and unmounted file systems

E. a list of tasks on the sleep queue

F. a list of tasks on the stopped queue

Correct Answer: ABC



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