Oracle Oracle Certifications 1Z0-820 Questions & Answers

• Question 121:

  You have been asked to troubleshoot the initial configuration of a virtual network connecting two local zones with the outside world.

  View the exhibit.

  

  The command dladm create-vnic -1 vswitch192.168.1 vnic1 fails with the error dladm: invalid link name `vswitch192.168.1' What is the reason for this error?

  A. The name vswitch192.168.1 is not legal.

  B. The zone must be specified with dladm create-vnic -z zone3 vnic1.

  C. The virtual interface must be specified with dladm create-vnic -z zone3 vnic1.

  D. The virtual interface must be created with ipadm create-vnic -1 switch192.168.1.

  E. The virtual switch must be created first with dladm create -etherstub vswitch192.168.1.

  Correct Answer: E

  Explanation: There is no data-link named vswitch192.168.

  We need to create an etherstub first.

  See Note and example below for details.

  Note: Create a VNIC in the system's global zone.

  # dladm create-vnic -l data-link vnic-name

  data-link is the name of the interface where the VNIC is to be configured.

  -l link, --link=link

  link can be a physical link or an etherstub.

  vnic-name is the name that you want to give the VNIC.

  For example, to create a VNIC named vnic0 on interface e1000g0, you would type the following:

  # dladm create-vnic -l e1000g0 vnic0

  Example: Creating a Virtual Network Without a Physical NIC

  First, create an etherstub with name stub1:

  # dladm create-etherstub stub1

  Create two VNICs with names hello0 and test1 on the etherstub. This operation implicitly creates a virtual

  switch connecting hello0 and test1. # dladm create-vnic -l stub1 hello0 # dladm create-vnic -l stub1 test1 Reference: man dladm

• Question 122:

  Review the zpool information on your server:

  

  You enabled the deduplication properly on the pooH/data file system, yet the information on the pool shows a DEDUP RATIO of 1 00x. Which two options describe why the data duplication ratio on pooM still shows I.OOx and not a higher value? (Choose two.)

  A. Most of the data in the pooM/data file system is not duplicate data.

  B. You have the copies property set to a value of greater than 1 on your ZFS file system.

  C. You have set the dedup property on the ZFS file system, but have not set the dedupratio property on the zpool.

  D. You have set the deduplication property on the ZFS file system, but have not set the dedupratio property on the zpool

  E. You have set the dedup property on the ZFS file system, but have not added any data to the file system since the dedup property was set-

  Correct Answer: BC

• Question 123:

  View the Exhibit and review the zpool and ZFS configuration information from your system.

  

  Identify the correct procedure for breaking the /prod_data mirror, removing c4t0d0 and c4t2d0, and making the data on c4t0d0and c4t2d0 accessible under the dev_data mount point.

  A. zpool split pool1 pool2 c4t0d0 c4t2d0 zpool import pool2 zfs set mountpoint = /dev_data pool2/prod_data

  B. zpool detach pool1 pool2 zpool attach pool2 zfs set mountpoint=/dev_data pool2/prod_data

  C. zpool split pool1/prod_data -n pool2/dev_data zfs set mountpoint = /dev_data pool2/prod_data

  D. zpool split pool1 pool2 c4t0d0 c4t2d0 zpool import pool2

  Correct Answer: D

  Explanation: In this Solaris release, you can use the zpool split command to split a mirrored storage pool, which detaches a disk or disks in the original mirrored pool to create another identical pool. After the split operation, import the new pool.

  Reference: Oracle Solaris ZFS Administration Guide, Creating a New Pool By Splitting a Mirrored ZFS Storage Pool

• Question 124:

  Which three Installation option allow for a "hands free" and "unattended'" Installation of the Solaris 11 environment?

  A. Jumpstart

  B. LiveCD

  C. A text Installation over the network

  D. An Automated Installation performed on an x86 client

  E. An Automated Installation using media from a local DVD or USB drive

  F. An Automated Installation using a networked repository

  Correct Answer: DEF

  Explanation: Oracle Solaris 11 uses Automated Installer (AI) for unattended installations.

  Unattended installations are possible by placing the contents of the AI Image media (or ISO image contents from a download) on an AI server.

  Reference: Differences between Oracle Solaris 10 and 11 for System Administrators http:// www.oracle.com/technetwork/server-storage/solaris11/overview/solaris-matrix- 1549264.html

• Question 125:

  New features wore added to ZFS in Oracle Solaris11. Your justification to upgrade from Solaris10 to oracle Solaris11 is that it will be possible to take advantage of the enhancements that were made to ZFS.

  Identify the three ZFS functions and features that are included in Oracle Solaris 11, but not in Solaris 10.

  A. Encrypted ZFS datasets

  B. Ability for ZFS to detect and remove redundant data from the tile system

  C. Shadow Data Migration

  D. Ability to split a mirrored ZFS storage pool

  E. Ability to use ZFS on the boot drive and boot to a ZFS root file system.

  F. elimination of the swap file system when using ZFS on the root disk

  Correct Answer: ABE

  Explanation: A: ZFS encryption was introduced in ZFS Pool Version Number 30, Solaris Nevada b149.

  Filesystem encryption since Solaris 11 Express

  B: Deduplication was introduced in ZFS Pool Version Number 21, Solaris Nevada b128.

  E: Booting From a ZFS Root File System Both SPARC based and x86 based systems use the new style of booting with a boot archive, which is a file system image that contains the files required for booting. When a system is booted from a ZFS root file system, the path names of both the boot archive and the kernel file are resolved in the root file system that is selected for booting.

  Reference: Oracle Solaris ZFS Administration Guide, Booting From a ZFS Root File System

• Question 126:

  Which three statements are true for the Oracle Solans 111mage Packaging System (IPS)? (Choose three.)

  A. a local repository should be stored on a 2FS file system.

  B. Network access to an IPS repository is provided to client systems using NFS.

  C. Network access to an IPS repository is provided to client systems using NFS and HTTP.

  D. The distribution constructor can get packages from a local IPS to build an installation image.

  E. A mirror repository contains all of the metadata and content for software packages.

  F. Clients access a mirror repository to obtain a publisher's catalog and software packages.

  Correct Answer: DEF

• Question 127:

  You want to deploy Oracle Solans 11 with the Automated Installer (Al). You need to make sure that your server and network meet the requirements for using Al Choose the three options that describe the requirements for using Al. (Choose three.)

  A. You must set up DHCP. The DHCP server and Al install server can be the same machine or two different machines.

  B. You can create only one manifest per install service. If you need more than one manifest, create multiple install services.

  C. The minimum requirement to operate as an Al install server is 1 GB of memory.

  D. If two client machines have different architectures and need to be installed with the same version of the Oracle Solaris 11 OS( then create two Al manifests and a single install service.

  E. Load the install/installadm package on the Al server.

  Correct Answer: ADE

• Question 128:

  The resource control in your zone is:

  rcll

  name: zone.cpu-shares

  value: (pnv=phvJleged,limit=20,aclion=none)

  When you boot the zone, this message is displayed:

  WARNING: The zone.cpu-shares rctl is set but FSS is not the default scheduling class for this zone. FSS

  will be used for processes in the zone but to get the full benefit of FSS, it should be the default scheduling

  class.

  Which option will resolve this issue?

  A. in the global zone, run this command to change the process scheduler for the global zone dispadmin -d FSS

  B. in the non-global zone, run this command to change the process scheduler for this specific zone: dispadmin -d FSS

  C. Change the zone resource control to: value: (priv=privileged,limit=20,action=none,default)

  D. Use svccfg to modify the general/scheduler property in the svc:/system/zones:default service: svccfg -s system/zones:default editprop general/scheduler=FSS

  Correct Answer: D

• Question 129:

  You are setting up an automated installer (AI) install server and issue the following command:

  installadm create-service -n prod_ai -s /repo/prod_ai.iso \

  -i 192.168.1.100 -c 5 -d /export/repo

  Which four options describe the install server that you have configured?

  A. The service name is prod_ai.

  B. DHCP base IP address is 192.168.1.100

  C. The initial IP address for the install clients will be 192.168.1.100. This IP address is temporary. After the client is booted, it will use IP addresses in the following range: 192.168.1.101-105.

  D. Five IP addresses are allocated for DHCP clients, starting with 192.168.1.100.

  E. The Install server will support up to five clients.

  F. The AI net image ISO file is located in /repo/prod and the net image ISO will be unpacked in /export/ repo.

  G. The AI net image ISO file is located in /repo/repo and is named /repo/prod/_ai.iso.

  Correct Answer: ABDF

  Explanation: A: -n

  Uses this install service name instead of default

  service name.

  B: -i

  Sets up a new DHCP server. The IP addresses,

  starting from dhcp_address_start, are set up.

  D: -c

  Sets up a total number of IP addresses in the

  DHCP table equal to the value of the

  count_of_ipaddr. The first IP address is the

  value of dhcp_ip_start that is provided by the

  -i option.

  F: -s

  Specifies location of AI ISO image to use for

  setting up the install service.

  Required: Specifies location to set up net image.

  Reference: man installadm

• Question 130:

  You have already generated a 256-bit AES raw key and named the keystore file /mykey. You need to use the key to create an encrypted file system.

  Which command should you use to create a ZFS encrypted file system named pool1/encrypt using the / mykey keystore?

  A. zfs create - o encryption = /mykey pool1/encrypt

  B. zfs create - o encryption = 256-ccm - o keysource = raw, file : ///my key pool1/encrypt

  C. zfs create - o encryption = AES keysource = /mykey pool1/encrypt

  D. zfs create - o encryption = on keystore = /mykey pool1/encrypt

  Correct Answer: B

  Explanation: Example: Encrypting a ZFS File System by Using a Raw Key

  In the following example, an aes-256-ccm encryption key is generated by using the pktool command and is

  written to a file, /cindykey.file.

  # pktool genkey keystore=file outkey=/cindykey.file keytype=aes keylen=256 Then, the /cindykey.file is

  specified when the tank/home/cindy file system is created.

  # zfs create -o encryption=aes-256-ccm -o keysource=raw,file:///cindykey.file tank/home/cindys

  Reference: Oracle Solaris ZFS Administration Guide, Examples of Encrypting ZFS File Systems