Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 181:

  Which two are true about accounts, groups, and roles in the Solaris user database?

  A. All Solaris user accounts must have a unique UID number.

  B. A Solaris account name may be any alphanumeric string, and can have a maximum length of 8 characters.

  C. Account UID numbers 0-09 are system-reserved.

  D. The GID for an account determines the default group ownership of new files created by that account.

  E. The groups that an account is a member of are determined by the entries in the /etc/group file.

  Correct Answer: AB

  A: Solaris uses a UID (User ID) to identify each user account. The UID is a unique number assigned to each user. It is usually assigned by the operating system when the account is created.

  B: In Solaris the account name can include any alphanumeric string (and . _ -). The maximum length is 8 characters.

• Question 182:

  Which two options describe how to override the default boot behavior of an Oracle Solaris 11 SPARC system to boot the system to the single-user milestone?

  A. from the ok prompt, issue this command: boot -m milestone=single-user

  B. From the ok prompt, issue this command: boot -m milestone/single-user

  C. From the ok prompt, issue this command: boot -milestone=single-user

  D. From the ok prompt. issue this command:boot -s

  E. From from the ok prompt, issue this command:boot -m milestone=s

  Correct Answer: AD

  By default, Solaris will boot to the pseudo milestone "all" and start all services. This behaviour can be changed at boot time using either "-s" to reach single-user, or the new SMF option "-m milestone=XXX" (see kernel(1M) for a list of the bootable milestones) to select an explicit milestone.

  Note: boot -s is the same as: boot -m milestone=single-user

  with the difference being that the former is a lot less to type and is what most SysAdmins will be familiar with.

• Question 183:

  User jack, whose account is configured to use the korn shell, logs in and examines the value of his PATH environment variable:

  

  What will happen, and why?

  A. He will get a "file not found" error, because the current directory is not in his seaech path.

  B. He will get a "file not found" error, because his home directory is not in his search path.

  C. The useradd script will execute, because jack is in the same directory that the script is located in.

  D. The command /user/sbin/useradd will execute, because it is the last match in the search path.

  E. The command /user/sbin/useradd will execute, because it is the first match in the search path.

  Correct Answer: D

• Question 184:

  Which two are user definable OpenBoot parameters that can be set in the OpenBoot PROM?

  A. IP address for the system console

  B. Host ID

  C. System date and time

  D. Default boot device

  E. Verbose hardware diagnostics

  F. Powering off the hardware

  Correct Answer: DE

  The NVRAM chip stores user-definable system parameters, also referred to as NVRAM variables or

  EEPROM parameters. The parameters allow administrators to control variables such as the default boot

  device and boot command. The NVRAM also contains writeable areas for user-controlled diagnostics,

  macros, and device aliases. NVRAM is where the system identification information is stored, such as the

  host ID, Ethernet address, and time-of-day (TOD) clock.

  Examples of NVRAM variables:

  Variable Default Description boot-device disk or net The device from which to start up.

  diag-device net The diagnostic startup source device. diag-file Empty string Arguments passed to the

  startup program in diagnostic mode. diag-switch? false Whether to run in diagnostic mode

• Question 185:

  Your mentor suggests using the dladm rename-link command to rename the network datalinks.

  What are the two advantages of following this advice?

  A. It can clarify which network interface has what purpose.

  B. It can simplify specifying the network interface with the dladm modify-aggr command.

  C. It can simplify specifying the network interface with the dladm modify-bridge command.

  D. It can simplify IP filter rule changes if the network interface is replaced with a different type.

  E. It can prevent accidental deletion of the network interface with the dladm delete-phys command.

  F. It can prevent accidental deletion of the network interface configuration with the ipadm delete-addr command.

  Correct Answer: AD

  Note: dladm rename-link [-R root-dir] link new-link Rename link to new-link. This is used to give a link a meaningful name, or to associate existing link configuration such as link properties of a removed device with a new device.

• Question 186:

  A datalink can best be described as______.

  A. a driver for a Network Interface Card

  B. the software connecting the Internet Layer and the Physical Layer

  C. a device that provides Classless Inter-Domain Routing

  D. a logical object used for IP Multipathing

  Correct Answer: D

  The command dladm is used to configure data-link interfaces in Sun Solaris. A configured data-link is represented in the system as interface that can be used for TCP/IP. Each data- link relies on either a single network device or an link aggregation device to send and recieve packets.

  Network interfaces provide the connection between the system and the network. These interfaces are configured over data links, which in turn correspond to instances of hardware devices in the system.

  In the current model of the network stack, interfaces and links on the software layer build on the devices in the hardware layer. More specifically, a hardware device instance in the hardware layer has a corresponding link on the data-link layer and a configured interface on the interface layer. This one-to-one relationship among the network device, its data link, and the IP interface is illustrated in the figure that follows.

  Network Stack Showing Network Devices, Links, and Interfaces:

  

• Question 187:

  Examine this command and its output:

  $ zfs list -r -t all tank

  Name USED AVAIL REFER MOUNTPOINT

  tank 3.00G 1.84G 32K /tank

  tank/database 3.00G 1.84G 2.00G /tank/database

  tank/[email protected] 1.00G - 2.00G ?

  Which two conclusions can be drawn based on this output?

  A. The tank dataset consumes 3 GB of storage.

  B. The tank/[email protected] dataset consumes 1 GB of storage that is shared with its parent.

  C. The tank/[email protected] dataset consumes 1 GB of storage that is not shared with its parent.

  D. The tank/[email protected] dataset consumes 2 GB of storage that is shared with its child.

  E. The tank/[email protected] dataset consumes 2 GB of storage that is not shared with its child.

  Correct Answer: AB

• Question 188:

  You enter dladm show-phys, which provides the following output:

  

  You then enter: ipadm create-ip net3 What is the output?

  A. ipadm: cannot; create interface net3: Operation failed.

  B. ipadm: cannot create interface net3: Interface already exists.

  C. ipadm: cannot create interface net3: IP address object not specified.

  D. No_response, The command was successful.

  Correct Answer: B

  According to the exhibit the interface already exists. The command ipadm create-ip net3 is supposed to create a new interface net3.

• Question 189:

  You are logged in as root to a newly installed Solaris 11 system. You issue the command useradd -d, and then examine the /usr/sadm/defadduser file. This file includes the entry defshell=/bin/sh. Which shell will now be the default for the next account created?

  A. bash shell

  B. C shell

  C. korn shod

  D. bourne shell

  Correct Answer: A

  Oracle Solaris 11 introduces user environment and command-line argument changes that include the following:

  *

  Shell changes - The default shell, /bin/sh, is now linked to ksh93. The default user shell is the Bourne-again (bash) shell.

  *

  The legacy Bourne shell is available as /usr/sunos/bin/sh.

  *

  The legacy ksh88 is available as /usr/sunos/bin/ksh from the shell/ksh88 package.

  *

  Korn shell compatibility information is available in /usr/share/doc/ksh/COMPATIBILITY.

• Question 190:

  You want to deploy Oracle Solaris 11 with the Automated Installer (AI). You need to make sure that your server and network meet the requirements for using AI.

  Identify two requirements for using AI.

  A. You should set up DHCP. The DHCP server and AI 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, you should create multiple install services.

  C. The minimum requirement to operate as an AI 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 you should create two AI manifests and a single install service.

  Correct Answer: AD

  A: An automated installation of a client over the network consists of the following high-level steps:

  Step 1. The client system boots over the network and gets its network configuration and the location of the

  install server from the DHCP server. Step 2: The install server provides a boot image to the client.

  Etc.

  D: If two client machines need to be installed with the same version of the Oracle Solaris 11 OS but need

  to be installed differently in other ways, then create two AI manifests for the AI install service. The different

  AI manifests can specify different packages to install or a different slice as the install target, for example.