1Z0-821 Online Practice Questions and Answers

Correct Answer: BDFGI

B: Configure the AI install server to use a static IP address and default route.

D: The create-service command can set up DHCP on the AI install server. If you want to set up a separate DHCP server or configure an existing DHCP server for use with AI. The DHCP server must be able to provide DNS information to the systems to be installed.

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

1.

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

install server from the DHCP server.

2.

The install server provides a boot image to the client.

3.

Characteristics of the client determine which installation instructions and which system configuration

instructions are used to install the client.

4.

The Oracle Solaris 11 OS is installed on the client, pulling packages from the package repository

specified by the installation instructions in the AI install service.

G: Install the AI tool set.

Use the installadm create-service command to create an AI install service. Give the service a meaningful

name, and specify the path where you want the service created. Specify the source of the network boot

image (net image) package or ISO file.

installadm create-service [-n svcname] [-s FMRI_or_ISO] [-d imagepath]

-d imagepath The imagepath is the location of the new install service. The install-image/solaris-auto- install package is installed to this location, or the specified ISO file is expanded at this location.

Correct Answer: A

The $HOME/.profile file is an initialization file that is executed after the /etc/profile when logging in to the Bourne or Korn shell. The file contains user preferences for variable settings. If the ENV variable is set to .kshrc, the .kshrc file executes every time a new shell begins execution. The $HOME/.profile is copied from the /etc/skel/local.profile file by the Administration Tool when creating a new account.

Note: /etc/skel/local.profile Per-system configuration file for sh/ksh/ksh93/bash login sessions, installed for new users

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.

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.

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.

Correct Answer: C

A kernel panic is a type of error that occurs when the core (kernel) of an operating system receives an instruction in an unexpected format or when it fails to handle properly. A kernel panic can also follow when the operating system can't recover from a different type of error. A kernel panic can be caused by damaged or incompatible software or, more rarely, damaged or incompatible hardware.

When a server kernel panics it abruptly halts all normal system operations. Usually, a kernel process named panic() outputs an error message to the console and stores debugging information in nonvolitile memory to be written to a crash log file upon restarting the computer. Saving the memory contents of the core and associated debugging information is called a "core dump."

Correct Answer: A

ZFS quotas can be set and displayed by using the zfs set and zfs get commands. In the following example, a quota of 10 Gbytes is set on tank/home/bonwick.

# zfs set quota=10G tank/home/bonwick # zfs get quota tank/home/bonwick NAME PROPERTY VALUE SOURCE tank/home/bonwick quota 10.0G local

Correct Answer: A

Etherstubs are pseudo ethernet NICs which are managed by the system administrator. You can create VNICs over etherstubs instead of over physical links. VNICs over an etherstub become independent of the physical NICs in the system. With etherstubs, you can construct a private virtual network that is isolated both from the other virtual networks in the system and from the external network. For example, you want to create a network environment whose access is limited only to your company developers than to the network at large. Etherstubs can be used to create such an environment.

Note: Oracle Solaris 11 introduces a new and powerful network stack architecture which includes:

*

Networking virtualization with virtual network interface cards (VNICs) and virtual switching (etherstubs)

*

Tight integration with zones

*

Network resource management - efficient and easy to manage integrated quality of service (QoS) to enforce bandwidth limit on VNICs and traffic flows

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.

Correct Answer: D

A ZFS reservation is an allocation of disk space from the pool that is guaranteed to be available to a dataset. As such, you cannot reserve disk space for a dataset if that space is not currently available in the pool. The total amount of all outstanding, unconsumed reservations cannot exceed the amount of unused disk space in the pool. ZFS reservations can be set and displayed by using the zfs set and zfs get commands. For example:

# zfs set reservation=5G tank/home/bill # zfs get reservation tank/home/bill NAME PROPERTY VALUE SOURCE tank/home/bill reservation 5G local

Correct Answer: A

Here we should use SIGTERM to terminate the process.

Note:

When no signal is included in the kill command-line syntax, the default signal that is used is ?5 (SIGKILL).

Using the ? signal (SIGTERM) with the kill command ensures that the process terminates promptly.

However, the ? signal should not be used to kill certain processes, such as a database process, or an

LDAP server process. The result is that data might be lost.

Tip - When using the kill command to stop a process, first try using the command by itself, without

including a signal option. Wait a few minutes to see if the process terminates before using the kill

command with the -9 signal.

Correct Answer: B

The content of the /etc/shadow document indicates that the newuser account has no password. We need to add a password.

The passwd utility is used to update user's authentication token(s).

D: Here the user account already exist. There is no need to create it.

When invoked without the -D option, the useradd command creates a new user account using the values specified on the command line plus the default values from the system. Depending on command line options, the useradd command will update system files and may also create the new user's home directory and copy initial files.

Correct Answer: A

Correct Answer: B

The sulog file, /var/adm/sulog, is a log containing all attempts (whether successful or not) of the su command. An entry is added to the sulog file every time the su command is executed. The fields in sulog are: date, time, successful (+) or unsuccessful (-), port, user executing the su command, and user being switched to. In the preceding example, all su attempts were successful, except for the attempt on 2/23 at 20:51, when user pete unsuccessfully attempted to su to user root.

Look for entries where an unauthorized user has used the command inappropriately. The following entry shows a successful (indicated by +) su from user userid to root.

SU 03/31 12:52 + pts/0 -root

Correct Answer: C

Pgrep takes a process name and return a PID.

Note: pgrep looks through the currently running processes and lists the process IDs which matches the

selection criteria to stdout. All the criteria have to match. For example, pgrep - u root sshd will only list the

processes called sshd AND owned by root.

Incorrec answers:

ps bigscript: You can't pass a name to ps, it interprets it as arguments.