Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 171:

  What is the output of the following command, if executed using the default shell for the root role account of a standard Live CD Install of Oracle Solaris 11?

  echo '$SHELL'

  A. /usr/bin/bash

  B. /usr/bin/ksh

  C. $SHELL

  D. the PID for the current shell

  Correct Answer: C

  Single quotes are most strict. They prevent even variable expansion. Double quotes prevent wildcard expansion but allow variable expansion. For example: #!/bin/sh echo $SHELL echo "$SHELL" echo '$SHELL' This will print: /usr/bin/bash /usr/bin/bash $SHELL

• Question 172:

  To help with your troubleshooting, you need to determine the version of the OBP. Which two commands will provide you with this information?

  A. printenv

  B. banner

  C. .version

  D. set-env

  E. show-devs

  F. value version

  Correct Answer: BC

  B: banner

  Displays power-on banner.

  The PROM displays the system banner. The following example shows a SPARCstation 2 banner. The

  banner for your SPARC system may be different.

  SPARCstation 2, Type 4 Keyboard ROM Rev. 2.0, 16MB memory installed, Serial # 289 Ethernet address 8:0:20:d:e2:7b, Host ID: 55000121

  C: .version

  Displays version and date of the boot PROM.

  Note: OBP-OpenBootProm is a firmware which is placed on the sun machine's prom chip. It is a os independent user interface to deal with the sun machine's hardware components. The user interface provides one or more commands to display system information.

• Question 173:

  Review the information taken from your server:

  

  Which option describes the command used to create these snapshots of the root file system?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

  zfs snapshot [-r] [-o property=value] ... filesystem@snapname|volume@snapname Creates a snapshot with the given name. All previous modifications by successful system calls to the file system are part of the snapshot. See the "Snapshots" section for details.

  -r Recursively create snapshots of all descendent datasets. Snapshots are taken atomically, so that all recursive snapshots correspond to the same moment in time.

• Question 174:

  The interface net3 should be operating, but is not.

  Command:

  

  Which command should you enter next?

  A. ipadm create-ip

  B. ipadm enable-if

  C. ipadm show-if

  D. ipadm up-addr

  Correct Answer: B

  Enable-if -t interface Enables the given interface by reading the configuration from the persistent store. All the persistent interface properties, if any, are applied and all the persistent addresses, if any, on the given interface will be enabled. -t, --temporary

  Specifies that the enable is temporary and changes apply only to the active configuration.

• Question 175:

  Which three of the components could be used in a ZFS storage pool, but are not recommended configurations?

  A. A file on a UFS file system

  B. A Veritas Volume Manager (VxVM) volume

  C. A LUN In a hardware RAID array

  D. A disk slice from an SMI labeled disk

  E. A Solaris Volume Manager (SVM) volume

  F. An EFI labeled disk

  Correct Answer: ABE

  A: ZFS also allows you to use UFS files as virtual devices in your storage pool. This feature is aimed primarily at testing and enabling simple experimentation, not for production use. The reason is that any use of files relies on the underlying file system for consistency. If you create a ZFS pool backed by files on a UFS file system, then you are implicitly relying on UFS to guarantee correctness and synchronous semantics. However, files can be quite useful when you are first trying out ZFS or experimenting with more complicated layouts when not enough physical devices are present. All files must be specified as complete paths and must be at least 64 Mbytes in size.

  B, E: You can construct logical devices for ZFS using volumes presented by software- based volume managers, such as Solaris Volume Manager (SVM) or Veritas Volume Manager (VxVM). However, these configurations are not recommended. While ZFS functions properly on such devices, less-than-optimal performance might be the result.

• Question 176:

  You want to delete the IPv4 address on the interface net3. Which command should you use?

  A. ipadm delete-ip net3/v4

  B. ipadm down-addr net3/v4

  C. ipadm disable-if net3/v4

  D. ipadm delete-vni net3/v4

  E. ipadm delete-addr net3/v4

  F. ipadm deiete-ipv4 ner3/v4

  Correct Answer: E

  The ipadm delete-addr subcommand removes addresses from interfaces.

  To remove an address from the IPMP group, type the following command:

  # ipadm delete-addr addrobj

  The addrobj uses the naming convention inder-interface/user-string.

• Question 177:

  You are installing the Solaris 11 Operation System by using the Text Installer. A panel prompts you to create a root password and a user account.

  Which four describe your options for completing this panel of the Installation?

  A. Creating a user account is optional.

  B. The root password must be set and cannot be blank.

  C. The root password can be left blank.

  D. If you provide a username, that user is assigned the root role.

  E. If you provide a username, that user is given root privileges.

  F. If you provide a username, root is an account rather than a role and is set to expire immediately.

  G. If you do not provide a username, root is an account rather than a role and is set to expire immediately.

  Correct Answer: ABDG

  A: You are not required to create a user account.

  B: You must create a root password.

  D: If you create a user account in this panel, you need to provide both the user's password and a root

  password.

  In this case, root will be a role assigned to the user.

  G: If you do not create a user account, you still need to provide a root password. In this case, root will be a regular user.

• Question 178:

  You are installing the Solaris 11 OE by using the Interactive Text Installer. You have selected the option to automatically configure the primary network controller. Which three items will automatically be configured as a result of this selection?

  A. The IP address.

  B. The name service.

  C. The time zone.

  D. A default user account.

  E. The terminal type.

  F. The root password.

  G. The host name.

  Correct Answer: ABC

  IP address and name service (such as a DNS server) are provided by the DHCP server.

• Question 179:

  A user brian is configured to use the bash shell. His home directory is /export/home/brian, and contains a .profile and a .bashrc file.

  In the -profile, there are these lines:

  genius =ritchie

  export genius

  In the .bashrc us this line:

  genius=kernighan In /etc/profile are these lines:

  genius=thompson

  export genius

  When brian logs in and asks for the value of genius, what will he find, and why?

  A. genius will be ritchie, because that was the value exported in .profile.

  B. genius will be kernighan, because .bashrc executes after .profile.

  C. genius will be ritchie because variable settings in .profile take precedence over variable settings in .bashrc.

  D. genius will be ritchie because .profile executes after .bashrc.

  E. genius will be thompson because /etc/profile system settings always override local settings.

  Correct Answer: C

• Question 180:

  user1, while in his home directory, is attempting to run the following command in his home directory: cp bigfile verybig

  The system displays the following error:

  cp: cannot create verybig: Disc quota exceeded

  Your initial troubleshooting shows that the df -h command indicates he is at 100% capacity. What command would you use to increase the disk space available to the user?

  A. zfs get quota rpool/export/home/user1

  B. zfs userused@user1

  C. zfs quota=none /rpool/export/home/user1

  D. df -h | grep user1 E. zfs set quota=none /rpool/export/home/user1

  Correct Answer: E

  ZFS quotas can be set and displayed by using the zfs set and zfs get commands. We can remove the quota restriction by setting to quota to none.