Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 121:

  View the Exhibit to inspect the boot environment Information displayed within a non global zone on your system.

  

  Which two options describe the solaris-1 boot environment?

  A. The solaris-1 boot environment is not bootable.

  B. The solaris-1 boot environment is incomplete.

  C. The solaris-1 boot environment was created automatically when the non global zone was created.

  D. The solaris-1 boot environment was created in the non-global zone using the beadm create command.

  E. The solaris-1 boot environment is associated with a non active global zone boot environment.

  Correct Answer: AE

  A: The ?of the Active Column indicates that this boot environment is inactive, and hence not bootable.

  Note: The values for the Active column are as follows:

  R ?Active on reboot.

  N ?Active now.

  NR ?Active now and active on reboot.

  "-" ?Inactive.

  "!" ?Unbootable boot environments in a non-global zone are represented by an exclamation point.

  http://docs.oracle.com/cd/E23824_01/html/E21801/unbootable.html#scrolltoc

• Question 122:

  Which two accurately identify features of a Solaris 10 branded zone?

  A. executes in a Solaris 10 global zone

  B. is created by importing a Solaris 10 flash archive

  C. enables Linux binary applications to run unmodified

  D. provides a complete runtime environment for Solaris 9 applications

  E. allows a Solaris 10 global zone to be migrated into a Solaris 10 non-global zone on a Solaris 11 system

  Correct Answer: BE

  B: It can be created by importing a Solaris 10 flash archive. You can use the Oracle Solaris Flash archiving tools to create an image of an installed system that can be migrated into a zone.

  The system can be fully configured with all of the software that will be run in the zone before the image is created. This image is then used by the installer when the zone is installed.

  Note: You can use alternate methods for creating the archive. The installer can accept the following archive formats:

  *

  cpio archives

  *

  gzip compressed cpio archives

  *

  bzip2 compressed cpio archives

  *

  pax archives created with the -x xustar (XUSTAR) format ?ufsdump level zero (full) backups

  Note:

  Branded zones that run an environment different that the OS release on the system

  *

  The lx branded zone introduced in the Solaris 10 8/07 release provides a Linux environment for your applications and runs on x86 and x64 machines on the Oracle Solaris 10 OS.

  *

  The solaris8 and solaris9 branded zones enable you to migrate an Oracle Solaris 8 or Oracle Solaris 9 system to an Oracle Solaris 8 or Oracle Solaris 9 Container on a host running the Oracle Solaris 10 8/07 Operating System or later Oracle Solaris 10 release.

  *

  The Oracle Solaris 10 Container brand is available in OpenSolaris build 127. These branded zones host Oracle Solaris 10 user environments.

  Note: One of the powerful features of Solaris 11 is the ability to run a Solaris 10 environment in a zone. Solaris 10 allows you to run Solaris 8 and 9 environments in zones, but only on SPARC.

• Question 123:

  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

  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

• Question 124:

  Which two statements describe the COMSTAR framework available in Oracle Solaris 11?

  A. It converts an Oracle Solaris 11 host into a SCSI target device that can be accessed over a storage network by Linux, Mac OS, or Windows client systems.

  B. iSCSI targets cannot be configured as dump devices.

  C. It provides support for iSCSI devices that use SLP.

  D. It is used to connect to Fibre Channel or iSCSI Storage Area Network (SAN) environments.

  E. It provides an upgrade and update path to convert your iSCSI LUNs from Solaris 10 systems.

  Correct Answer: AB

  A: You can configure Common Multiprotocol SCSI TARget, or COMSTAR, a software framework that enables you to convert any Oracle Solaris 11 host into a SCSI target device that can be accessed over a storage network by initiator hosts.

  This means you can make storage devices on a system available to Linux, Mac OS, or Windows client systems as if they were local storage devices. Supported storage protocols are iSCSI, FC, iSER, and SRP.

  B: iSCSI targets cannot be configured as dump devices.

• Question 125:

  You are configuring NFS on a server. Select the two statements that are true.

  A. Resources listed in /etc/dfs/dfstab are automatically shared on boot up.

  B. A directory cannot be shared if a subdirectory below it is already shared.

  C. Renaming a share created with the zfs set share command is not supported.

  D. NFS and SMB protocols cannot be used simultaneously to share the same directory.

  Correct Answer: AC

  A: ZFS can automatically share file systems by setting the sharenfs property. Using this property, you do not have to modify the /etc/dfs/dfstab file when a new file system is shared. The sharenfs property is a comma-separated list of options to pass to the share command. The value on is an alias for the default share options, which provides read/write permissions to anyone. The value off indicates that the file system is not managed by ZFS and can be shared through traditional means, such as the /etc/dfs/dfstab file. All file systems whose sharenfs property is not off are shared during boot.

• Question 126:

  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 withdladm create-vnic -z zone3 vnic1.

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

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

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

  Correct Answer: E

  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

• Question 127:

  Consider the following commands:

  

  What is displayed when this sequence of commands is executed using the bash shell?

  A. Hello, world

  B. cat: cannot open file1

  C. cat: cannot open file1Hello, world

  D. cat: cannot open file1 Hello, World

  E. bash: syntax error near unexpected token 'andand'

  Correct Answer: B

  First line (rm file1) deletes/removes file1.

  Second line captures the text into file2.

  The first part of line 3 (cat file1) fails as the file1 does not exist. The andand (AND) operator will ensure that the

  third line fails. The result of line 3 will be the result of first part of line 3 (cat file1).

  Note: cat - concatenate files and print on the standard output

  Note #1: A list is a sequence of one or more pipelines separated by one of the operators `;', `and', `andand', or `||',

  and optionally terminated by one of `;', `and', or a newline.

  Of these list operators, `andand' and `||' have equal precedence, followed by `;' and `and', which have equal

  precedence.

  AND and OR lists are sequences of one or more pipelines separated by the control operators `andand' and `||',

  respectively. AND and OR lists are executed with left associativity.

  An AND list has the form

  command1 andand command2

  command2 is executed if, and only if, command1 returns an exit status of zero.

  An OR list has the form

  command1 || command2

  command2 is executed if, and only if, command1 returns a non-zero exit status.

  The return status of AND and OR lists is the exit status of the last command executed in the list.

  Note #2 (on exit status): Zero means command executed successfully, if exit status returns non-zero value then your command failed to execute.

• Question 128:

  You want to configure an iSCSI target device on your system. Select the group package required to install this functionality on your system.

  A. storage-server

  B. solaris-small-server

  C. storage-avs

  D. storage-nas

  Correct Answer: A

  How to Create an iSCSI LUN The disk volume provided by the server is referred to as the target. When the LUN is associated with an iSCSI target, it can be accessed by an iSCSI initiator. The following tasks are completed on the system that is providing the storage device.

  1. Install the COMSTAR storage server software.

  target# pkg install storage-server

  Etc.

• Question 129:

  You notice that the /var/.dm/messages file has become very large. Typically, this is managed by a crontab entry. Which entry should be in the root's crontab file?

  A. 10 3 * * * /usr/adm/messages

  B. 10 3 * * * /usr/sbin/logadm

  C. 10 3 * * * /usr/sbin/syslogrotate

  D. 10 3 * * * /usi/sbin/logrotate

  E. 10 3 * * * /usr/sbin/messages

  Correct Answer: B

  This example shows how to display the default root crontab file.

  $ suPassword:

  # crontab -l

  #ident "@(#)root 1.19 98/07/06 SMI" /* SVr4.0 1.1.3.1 */ #

  # The root crontab should be used to perform accounting data collection.

  #

  #

  10 3 * * * /usr/sbin/logadm

  15 3 * * 0 /usr/lib/fs/nfs/nfsfind

  30 3 * * * [ -x /usr/lib/gss/gsscred_clean ] andand /usr/lib/gss/gsscred_clean #10 3 * * * /usr/lib/krb5/

  kprop_script ___slave_kdcs___

• Question 130:

  The ZFS configuration on your server is:

  Pool1 6.67G31K/pool

  Pool1/data31K31K/data

  Select the three commands that you would use to 1. Create, 2. List, and 3. Delete a snapshot of the /data file system.

  A. zfs snapshot pool1/data@now

  B. zfs create snapshot pool1/data@now

  C. zfs list -t snapshot

  D. zfs list -t snapshot pool1/data

  E. zfs destroy pool1/data@now

  F. zfs destroy snapshot pool1/data@now

  Correct Answer: ADE

  A: Snapshots are created by using the zfs snapshot command, which takes as its only argument the name of the snapshot to create.

  D: You can list snapshots as follows: # zfs list -t snapshot

  E: Snapshots are destroyed by using the zfs destroy command. For example:

  # zfs destroy tank/home/ahrens@now