1Z0-590 Real Exam Questions and Verified Answers

Question 1 Multiple choice

What three artifacts are created as a result of running the JeOS tool?

A
a System.img file representing the operating system
B
optional image files as specified in the command
C
a README file with product name, version number and build timestamp
D
a vm.cfg file pointing to the created images, along with specified memory and CPU information
E
a tar.gz file with all of the images, README and vm.cfg files compressed

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Correct answers: A, D, E

Question 2 Multiple choice

There is an issue booting into a virtual machine. The log files show that there is an issue during the Linux boot process of the guest.

What two methods will best help determine the problem?

A
Use xm console to attach to the guest while it is booting and look for the specific error.
B
Run xm dmesg to see hardware errors in the guest.
C
Run xm info to see the list of devices being attached to the virtual machine.
D
xm block-attach the disk to another virtual machine to inspect the file system and check module loading issues.

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Correct answers: A, B

Question 3 Single choice

What command will show the current status of all Oracle VM Agent components?

A
service ovs status
B
xm show ovs-agent
C
service ovs-agent status
D
repos.py -1
E
xm dmesg

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Correct answer: C

Question 4 Multiple choice

What two attributes of a virtual machine are not available on the Oracle VM Manager Home screen when the virtual machine is currently powered down?

A
Memory Size
B
Server Name
C
VNC Port
D
Server Pool Name
E
Owner
F
Number of Virtual CPUs

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Correct answers: B, C

Explanation

Explanation: If you properly shutdown the virtual machine then you will not get the Server Name surely . So that one correct answer is Server Name. Let's find another correct answer.

Follow the picture and you will find that the virtual machines which are shutdowed and there is available of Owner and Server Pool Name. But if the machine is not up there so how will you get the vnc port for that machine :D?
Correct answer is B and C.

Question 5 Multiple choice

Which two are characteristics of block I/O in a fully hardware virtualized configuration?

A
The virtual machine I/O path only uses the block device driver from dom0.
B
The virtual machine relies on emulation of the hardware in dom0 for block I/O. the guest
C
The virtual machine I/O path includes the native block device drivers from operatingsystem.
D
The virtual machine does not need a block device driver.
E
The virtual machine must provide emulation of the hardware through its own IOEMU drivers.

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Correct answers: B, C

Question 6 Multiple choice

Which two are true of an NFS repository when used with Oracle VM?

A
NFS repositories are excellent for storing guests' root file systems.
B
NFS is a more expensive option than iSCSI or SAN fabrics.
C
OCFS2 must be used as the filesystem format for volumes exposed through NFS.
D
NFS shares mounted directly in a guest require the DM-NFS driver to be installed on the guest.
E
NFS is supported for use in RAC only when mounted from the guest (not domO).

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Correct answers: A, B

Explanation

Explanation:
First of all here you have to select two options but answer shows one. A is ok. A performance comparison of NFS and iSCSI for IP-Networked Storage showed that iSCSI is faster than NFS because iSCSI caches and updates meta-data asynchronously and transfers blocks rather than files. So the options B is right.

Question 7 Single choice

A customer is running an existing server farm of open source Xen servers running the same version of Xen as Oracle VM 2.2. The customer would like to manage these servers with Oracle VM.

What is the best reason that this will not be possible?

A
Oracle VM's Xen implementation uses a different disk format for virtual machines than open source Xen, so live migration of virtual machines will not work between the existing Xen implementation and Oracle VM.
B
Oracle VM employs a layer of technology on top of Xen that enables remote management through Oracle VM Manager or Oracle Enterprise Manager. The existing Xen servers are incapable of communicating in this manner.
C
Oracle VM uses a forked Xen distribution, so although the version numbers are the same, the behavior of the virtual machines at run time will be different.
D
Oracle VM uses a highly proprietary protocol format for Live Migration that enables strongencryption. Standard Xen servers will not be able to live migrate to the Oracle VM servers, or vice versa.

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Correct answer: B

Question 8 Single choice

In a paravirtualized environment, which answer best describes the drivers that are used in domO and the guest to communicate block I/O requests?

A
A blkback driver is used in dom0, and a blkfront driver is used in the guest.
B
A native device driver is used in dom0, and a blkback driver is used in the guest.
C
A blkfront driver is used in dom0, and a native device driver is used in the guest.
D
A blkfront driver is used in dom0, and a blkbck driver is used in the guest.
E
Native drivers are used in both dom0 and the guest.

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Correct answer: A

Question 9 Single choice

What component of Oracle VM Product is specifically responsible for the automatic failover process?

A
OCFS2
B
Server Pool Master
C
Oracle Clusterware
D
utility server
E
virtual machine server

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Correct answer: B

Explanation

http://docs.oracle.com/cd/E11081_01/doc/doc.21/e10898/ha.htm
To enable HA, you must first make sure all Virtual Machine Servers in the server pool:

Use the same shared storage.

Are in the same OCFS2 or NFS cluster.

Are Oracle VM Server Release 2.1.2 or above.

Have the same cluster root, which is a specially designated shared storage used for heatbeating in the cluster. For example, the cluster root might be example.com:/OVS for an NFS cluster, or /dev/sdd6 for an OCFS2 cluster. The heartbeat file would be located at example.com:/OVS/.server_pool_hb for an NFS cluster. There is no heartbeat file for an OCFS2 cluster as one is in-built in the file system.

Have the cluster root mounted at /OVS. All other storage may be mounted at the standard location of /
OVS/uuid.

Have moved any /OVS mount points (set in FSTAB for Releases 2.1 or 2.1.1) to the /etc/ovs/repositories file. All storage, even that mounted at /OVS, must be maintained in the /etc/ovs/repositories file. You can move the mount points to the /etc/ovs/repositories file with the following command:

# /usr/lib/ovs/ovs-cluster-check --alter-fstab

Have a shared cluster root at /OVS, and not local, using clustered OCFS2 on SAN, or ISCSI storage, or NFS on NAS. The default local storage is OCFS2, and is not supported with HA.

Question 10 Single choice

A RedHat Enterprise Linux installation with three installation CDs needs to be created.

What is the proper way to set up the ISO images?

A
The ISO images should each be placed in their own subdirectory under/OVS/iso_pool.
B
The ISO images should be joined into one larger ISO image using the M75cat command, then placed under a subdirectory of/OVS/iso_pool.
C
The ISO images should all be placed under/OVS/iso_pool, using distinct names to differentiate them.
D
The ISO images should be placed in one subdirectory under/OVS/seed_pool, named according to the vendor and distribution name.
E
The ISO images should be placed in one subdirectory under/OVS/iso_pool, named according to the vendor and distribution name.

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Correct answer: A