Oracle 1Z0-821 Study Guides 2021

NEW QUESTION 1
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

Answer: C

Explanation: 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

NEW QUESTION 2
You have installed the SMF notification framework to monitor services. Which command is used to set up the notifications for a particular service?

• A. svccfg
• B. svcadm
• C. setnotify
• D. smtp-notify

Answer: A

Explanation: How to Set Up Email Notification of SMF Transition Events
This procedure causes the system to generate an email notification each time one of the services or a selected service has a change in state. You can choose to use either SMTP or SNMP. Normally, you would only select SNMP if you already have SNMP configured for some other reason.
By default, SNMP traps are sent on maintenance transitions. If you use SNMP for monitoring, you can configure additional traps for other state transitions.
1. Become an administrator or assume a role that includes the Service Management rights profile.'
2. Set notification parameters. Example 1:
The following command creates a notification that sends email when transactions go into the maintenance state.
# /usr/sbin/svccfg setnotify -g maintenance mailto:sysadmins@example.com
Example 2:
The following command creates a notification that sends email when the switch service goes into the online state.
# /usr/sbin/svccfg -s svc:/system/name-service/switch:default setnotify to-online mailto:sysadmins@example.com
Note: The svccfg command manipulates data in the service configuration repository. svccfg can be invoked interactively, with an individual subcommand, or by specifying a command file that contains a series of subcommands.
Changes made to an existing service in the repository typically do not take effect for that service until the next time the service instance is refreshed.

NEW QUESTION 3
Select two statements that correctly describe the capabilities of the Distribution Constructor.

• A. ISO images for use with the Automated Installer (AI) can be created.
• B. Bootable USB images can be created for SPARC and x86 architectures.
• C. A single installation server can be used to create ISO images for SPARC and x86 architectures.
• D. Checkpoints can be used to pause the build, allowing scripts to run that modify theresulting ISO Image.
• E. A single Installation server can be used to create ISO images for Solaris 10 and Solaris11 operating systems.

Answer: AD

Explanation: A: You can use the distribution constructor to create the following types of Oracle Solaris images:
* (A) x86 or SPARC ISO Image for Automated Installations
* Oracle Solaris x86 live CD image
* x86 or SPARC Oracle Solaris text installer image
* x86 Oracle Solaris Virtual Machine
Note: You can use the distribution constructor to build custom Oracle Solaris images. Then, you can use the images to install the Oracle Solaris software on individual systems or multiple systems. You can, also, use the distribution constructor to create Virtual Machine (VM) images that run the Oracle Solaris operating system.
D: Checkpointing Options
You can use the options provided in the distro_const command to stop and restart the build process at various stages in the image-generation process, in order to check and debug the image that is being built. This process of stopping and restarting during the build process is called checkpointing.

NEW QUESTION 4
You run the command dlstat show-link -r.
Select the two correct statements regarding the information displayed in the INTRS column.

• A. No value is listed for virtual network interfaces.
• B. A value of 0 is listed for virtual interfaces and ether stubs.
• C. The number of Interrupts is listed, which indicates network efficiency.
• D. A number equal to the number of transmitted Ethernet frames is listed for physical links.
• E. The number of packets that were interrupted by a collision is listed, which may indicate hardware problems.

Answer: CE

Explanation: In this output, the statistics for interrupt (INTRS) are significant. Low interrupt numbers indicate greater efficiency in performance. If the interrupt numbers are high, then you might need to add more resources to the specific link.
Example:
# dlstat -r -i 1
LINK IPKTS RBYTES INTRS POLLS CH<10 CH10-50 CH>50 e1000g0 101.91K 32.86M 87.56K 14.35K 3.70K 205 5
nxge1 9.61M 14.47G 5.79M 3.82M 379.98K 85.66K 1.64K vnic1 8 336 0 0 0 0 0
e1000g0 0 0 0 0 0 0 0
nxge1 82.13K 123.69M 50.00K 32.13K 3.17K 724 24
vnic1 0 0 0 0 0 0 0
Note: dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[, ...]] [-u R|K|M|G|T|P] [link] Display statistics for a link.
-r
Display receive-side statistics only. Includes bytes and packets received, hardware and software drops, and so forth.
List of supported RX fields: link
iusedby
ibytes ipkts intrs polls
hdrops: hardware drops
sdrops: software drops (owing to bandwidth enforcement) ch<10: number of packet chains of length < 10
ch10-50: number of packet chains of length between 10 and 50 ch>50: number of packet chains of length > 50

NEW QUESTION 5
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

Answer: ABE

Explanation: 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.

NEW QUESTION 6
Review the storage pool information:

Which statement describes the status of this storage pool?

• A. It is a RAIDZ storage pool and can withstand a single disk failure; data will be striped at: disk components.
• B. It is a double-parity RAIDZ storage pool and can withstand two disk failures; data will be striped across four disk components.
• C. It is an improperly configured RAIDZ storage pool; data will be striped across four disk components, but only three drives are protected with redundancy.
• D. It is an improperly configured RAIDZ storage pool; data will be striped across three disk components, but only three drives are protected with redundancy.

Answer: D

Explanation: Device c3t6d0 is not included in the RAIDZ storage pool. The other three devices are included in the raidz pool. The data on these devices are protected.
Note: In addition to a mirrored storage pool configuration, ZFS provides a RAID-Z configuration with either single, double, or triple parity fault tolerance. Single-parity RAID-Z (raidz or raidz1) is similar to RAID-5. Double-parity RAID-Z (raidz2) is similar to RAID-6.

NEW QUESTION 7
Select the packet type that identifies members of the group and sends information to all the network interfaces in that group.

• A. Unicast
• B. Multicast
• C. Broadcast
• D. Bayesian
• E. Quality of Service Priority

Answer: B

Explanation: IPv6 defines three address types: unicast
Identifies an interface of an individual node.
multicast
Identifies a group of interfaces, usually on different nodes. Packets that are sent to the multicast address go to all members of the multicast group.
anycast
Identifies a group of interfaces, usually on different nodes. Packets that are sent to the anycast address go to the anycast group member node that is physically closest to the sender.

NEW QUESTION 8
Which three options describe the purpose of the zonep2vchk command?

• A. Used on a Solaris 10 global zone to access the system for problems before migrating that system to a Solaris 10 branded zone.
• B. Used to access a Solaris 10 global zone for problems before migrating that zone to a Solaris 11 global zone
• C. Used to create zonecfg template for a Solaris 10 global zone that that will be migrated to a solaris10 branded zone.
• D. Used to migrate an Oracle Solaris 11 global zone to a non-global zone.
• E. Used to migrate a Solaris 10 global zone to a non-global zone on the same server; the non-global zone can then be migrated to a Solaris 11 server as a Solaris10 branded zone.

Answer: CDE

Explanation: zonep2vchk
- check a global zone's configuration for physical to virtual migration into non-global zone
The zonep2vchk utility is used to evaluate a global zone's configuration before the process of physical-to-virtual (p2v) migration into a non-global zone.
The p2v process involves archiving a global zone (source), and then installing a non-global zone (target) using that archive
Zonep2vchk serves two functions. First, it can be used to report issues on the source which might prevent a successful p2v migration. Second, it can output a template zonecfg, which can be used to assist in configuring the non-global zone target.
Zonep2vchk can be executed on a Solaris 10 or later global zone. To execute on Solaris 10, copy the zonep2vchkutility to the Solaris 10 source global zone.
When run on Solaris 10, a target release of S11 can be specified, which will check
for p2v into a Solaris 10 Branded zone.

NEW QUESTION 9
A change in your company’s security policy now requires an audit trial of all administrators assuming the sysadm role, capturing:
There are two command necessary to accomplish this change. One is a rolemod command. What is the other?

• A. auditconfig set policy=argv
• B. auditconfig -setpolicy +argv
• C. auditconfig -setflags lo, ex sysadm
• D. auditconfig set flags=lo, ex sysadm

Answer: B

Explanation: Audit Significant Events in Addition to Login/Logout (see step 2 below)
Use this procedure to audit administrative commands, attempts to invade the system, and other significant events as specified by your site security policy.
For all users and roles, add the AUE_PFEXEC audit event to their preselection mask.
# usermod -K audit_flags=lo, ps:no username
# rolemod -K audit_flags=lo, ps:no rolename
# auditconfig -setpolicy +argv
3- Record the environment in which audited commands are executed.
# auditconfig -setpolicy +arge
Note: [-t] -setpolicy [+|-]policy_flag[, policy_flag ...]
Set the kernel audit policy. A policy policy_flag is literal strings that denotes an audit policy. A prefix of + adds the policies specified to the current audit policies. A prefix of - removes the policies specified from the current audit policies. No policies can be set from a local zone unless the perzone policy is first set from the global zone.

NEW QUESTION 10
You have completed configuring a zone named dbzone on your Solaris 11 server. The configuration is as following:

The global zone displays the following network information:

The zone has never been booted. Which three options correctly describe this zone?

• A. It is a sparse root zone.
• B. It is a whole root zone.
• C. It is an immutable zone.
• D. It is a native zone.
• E. The zone shares the network interface with the host.
• F. The zone uses a virtual network interface.
• G. The hostid is the same as the global zone.
• H. The IP address of the zone is 10.0.2.18.

Answer: CEG

Explanation: C: Immutable Zones provide read-only file system profiles for solaris non-global zones. Note that ip-type: exclusive:
Starting with OpenSolaris build 37 and Oracle Solaris 10 8/07, a default zone can be configured as an "exclusive-IP zone" which gives it exclusive access to the NIC(s) that the zone has been assigned. Applications in such a zone can communicate directly with the NIC(s) available to the zone.
Note on zones:
After installing Oracle Solaris on a system, but before creating any zones, all processes run in the global zone. After you create a zone, it has processes that are associated with that zone and no other zone. Any process created by a process in a non-global zone is also associated with that non-global zone.
Any zone which is not the global zone is called a non-global zone. Most people call non- global zones simply "zones." Some people call them "local zones" but this is discouraged.
The default native zone file system model on Oracle Solaris 10 is called "sparse-root." This model emphasizes efficiency and security at the cost of some configuration flexibility. Sparse-root zones optimize physical memory and disk space usage by sharing some directories, like /usr and /lib. Sparse-root zones have their own private file areas for directories like /etc and /var. Whole-root zones increase configuration flexibility but increase resource usage. They do not use shared file systems for /usr, /lib, and a few others.
There is no supported way to convert an existing sparse-root zone to a whole-root zone. Creating a new zone is required.

NEW QUESTION 11
You need to set up an Oracle Solaris 11 host as an iSCSI target so that the host's disk can be accessed over a storage network. The disk device is c3t4d0.
Which six options describe the steps that need to be taken on this host to enable an iSCSI target?

• A. Create a ZFS file system named iscsi/target.
• B. Create a zpool named iscsi with disk device c3t4d0
• C. Create zfs volume named iscsi/target.
• D. Use the stmfadm command to create a LUN using /dev/zvol/rdsk/iscsi/target.
• E. Use the stmfadm command to create a LUN using iscsi/target.
• F. Use the stmfadm command to make the LUN viewable.
• G. Use the stmfadm command to make the volume viewable.
• H. Enable the svc:/network/iscsi/target:default Service.
• I. Use the itadm command to create the iSCSI target.

Answer: BCDFHI

Explanation: How to Create an iSCSI LUN
The following steps are completed on the system that is providing the storage device.
Example: target# zpool create sanpool mirror c2t3d0 c2t4d0 (C)2. Create a ZFS volume to be used as a SCSI LUN. (D)3. Create a LUN for the ZFS volume.
Example:
target# stmfadm create-lu /dev/zvol/rdsk/sanpool/vol1
Logical unit created: 600144F0B5418B0000004DDAC7C10001
4. Confirm that the LUN has been created.
Example
target# stmfadm list-lu
LU Name: 600144F0B5418B0000004DDAC7C10001
(F) 5. Add the LUN view.
This command makes the LUN accessible to all systems.
target# stmfadm add-view 600144F0B5418B0000004DDAC7C10001 How to Create the iSCSI Target
This procedure assumes that you are logged in to the local system will contains the iSCSI target.
Note: The stmfadm command manages SCSI LUNs. Rather than setting a special iSCSI property on the ZFS volume, create the volume and use stmfadm to create the LUN.
(H) 1. Enable the iSCSI target service.
target# svcadm enable -r svc:/network/iscsi/target:default
(I) 2. Create the iSCSI target.
target# itadm create-target

NEW QUESTION 12
You are troubleshooting a newly installed desktop Oracle Solaris 11 system with a single network interface. From this system, you can connect to other systems within the company
intranet, but cannot access any external services (such as websites and email), even when using IP addresses.
Examining the routing table confirms that the default route to 192.168.1.1 is missing. DHCP is not used at this site. Which two commands will temporarily mid permanently configure the default route?

• A. ipadm set-gateway 192.168.1.1
• B. route add default 192.168.1.1
• C. ipadm set-default 192.168.1.1
• D. dladm route-add –d 192.168.1.1
• E. echo 192.168.1.1 >/etc/gateway
• F. echo 192.168.1.1 >/etc/defaultrouter

Answer: BF

Explanation: B: Setting the default route on Solaris is easy. If you are trying to just set the route temporarily you can use the route command:
Route add default <ipaddress> Example:
Route add default 192.168.1.1
Note: Route command manipulates the kernel routing tables. Routing is the process of forwarding a packet from one computer to another. It is based on the IP address in the IP packet header and netmask.
F: If you want the route to be persisted when you reboot the system, you will need to set the route in the /etc/defaultrouter file.
/etc/defaultrouter Example:
Echo 192.168.1.1 > /etc/defaultrouter

NEW QUESTION 13
You are troubleshooting the failure of a computer to mount an NFS file system hosted by a server (hostname mars) in the local area network.
Select the three commands that will enable you to identify the problem.

• A. ping - s mars
• B. cat /etc/vfstab
• C. cat /etc/dfs/dfstab
• D. sharemgr show -v
• E. showmount -e mars
• F. rpcinfo -s mars | egrep ‘nfs|mountd’

Answer: BEF

Explanation: B: The mount point Error. The following message appears during the boot process or in response toan explicit mount request and indicates a non-existent mount point.
Mount: mount-point /DS9 does not exist.
To solve the mount point error condition, check that the mount point exists on the client. Check the spelling of the mount point on the command line or in the /etc/vfstab file (B) on the client, or comment outthe entry and reboot the system.
Note: The /etc/vfstab file lists all the file systems to be automatically mounted at system boot time, with the exception of the /etc/mnttab and /var/run file systems.
E: showmount
This command displays all clients that have remotely mounted file systems that are shared from an NFS server, or only the file systems that are mounted by clients, or the shared file systems with the client access information. The command syntax is:
showmount [ -ade ] [ hostname ]
where -a prints a list of all the remote mounts (each entry includes the client name and the
directory), -d prints a list of the directories that are remotely mounted by clients, -e prints a list of the files shared (or exported), and hostname selects the NFS server to gather the information from. If hostname is not specified the local host is queried.
F: * mountd Daemon
This daemon handles file-system mount requests from remote systems and provides access control. The mountd daemon checks /etc/dfs/sharetab to determine which file systems are available for remote mounting and which systems are allowed to do the remote mounting.
* Commands for Troubleshooting NFS Problems
These commands can be useful when troubleshooting NFS problems. rpcinfo Command
This command generates information about the RPC service that is running on a system.

NEW QUESTION 14
You have a user that needs to use the cron tool to schedule some repetitive tasks. When the user enters the crontab –e command in a terminal window, the following error appears:
crontab: you are not authorized to use cron. Sorry
In order to troubleshoot this issue, in what directory would you start your invest

• A. /etc/cron.d
• B. /var/spool/cron
• C. /var/spool/cron/crontable
• D. /var/spool/cron/atjobs

Answer: A

Explanation: crontab: you are not authorized to use cron. Sorry.
This message means that either the user is not listed in the cron.allow file (if the file exists), or the user is listed in the cron.deny file.
You can control access to the crontab command by using two files in the /etc/cron.d directory: cron.deny and cron.allow. These files permit only specified users to perform crontab command tasks such as creating, editing, displaying, or removing their own crontab files.
The cron.deny and cron.allow files consist of a list of user names, one user name per line.

NEW QUESTION 15
User brian changes the permissions for db_data this command: chmod 4755 db_data
What is true?

• A. db_data now has permissions rwsr-xr-x and can be deleted only by user brian.
• B. db_data now has permissions rwsr-xr-x and, if executed, will inn with the permissions of user brian.
• C. db_data now has permissions rwxr-sr-x and can be deleted only by members of the group owning it.
• D. The permissions for db_data cannot be determined, because the permissions prior to the change have not been specified.
• E. db_data must be an ordinary file, because special permissions cannot be set on a directory.

Answer: C

Explanation: Use the chmod command to change permissions for a file or directory. You must be the owner of a file or directory, or have root access, to change its permissions.
Here we do not know if brian owns db_data. Note:
Permission 7 full
6 read and write
5 read and execute 4 read only
3 write and execute 2 write only
1 execute only
0 none
0 --- no permission 1 --x execute
2 -w- write
3 -wx write and execute 4 r-- read
5 r-x read and execute 6 rw- read and write
7 rwx read, write and execut
Solaris: Solaris Advanced User's Guide

NEW QUESTION 16
Which two statements are true concerning the network stack on Oracle Solaris 11?

• A. Hardware network interfaces and datalinks have a one-to-one relationship.
• B. IP addresses are assigned to datalinks.
• C. A single IP interface can have either an IPv4 address or an IPv6 address but not both.
• D. A single IP interface can have both an IPv4 address and an IPv6 address.
• E. A single datalink can have only one IP interface.

Answer: AD

NEW QUESTION 17
Review the zonestat command:
zonestate - q physical - memory -R high -z -p -p “zones” 10 24h 60m
Select the option that correctly describes the information that is displayed by this command.

• A. It is a sample of dbzone’s physical memory usage taken every hour over a 24-hour period.Only the top 10 samplings of peak memory usage are displaye
• B. All other utilization data is eliminated.
• C. It is a sample of dbzone’s CPU, virtual memory, and networking utilization.Physical memory is executed from the report.The sampling is taken every 10 minutes over a 24- hour period and peak utilization id displayed each hour.
• D. It is a sample of dbzone’s CPU, virtual memory, and networking utilization.Physical memory is executed from the report.The sampling is taken every 10 minutes over a 24- hour period and displayed each hour.
• E. It is a sample of dbzone’s physical memory usage taken every 10 seconds and 24-hour period.Only peak virtual memory usage and CPU utilization are displayed each hour.All other Utilization data is eliminated.
• F. It is a sample of dbzone’s physical memory usage taken every 10 seconds and 24-hour period.Only peak memory usage is displayed each hour.All other utilization data is eliminated.

Answer: D

Explanation: * (Not A, B, C): interval (here 10 seconds): Specifies the length in seconds to pause between each interval report.
* duration (here 24 h)
* -R report[, report] (here high) Print a summary report.
High Print a summary report detailing the highest usage of each resource and zone during any interval of the zonestat utility invocation.
Note: The zonestat utility reports on the cpu, memory, and resource control utilization of the currently running zones. Each zone's utilization is reported both as a percentage of system resources and the zone's configured limits.
The zonestat utility prints a series of interval reports at the specified interval. It optionally
also prints one or more summary reports at a specified interval.
The default output is a summary of cpu, physical, and virtual memory utilization. The -r option can be used to choose detailed output for specific resources.