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Oracle 1Z0-821 Exam Syllabus Topics:
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NEW QUESTION 90
A user account must be a member of a primary group, and may also be a member of one or more secondary groups. What is the maximum total number of groups that one user can concurrently belong to?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
- F. The number of groups one user can concurrently belong to is unlimited in Solaris 11.
- G. 5
Answer: B
Explanation:
Explanation/Reference:
Explanation:
Each user belongs to a group that is referred to as the user's primary group. The GID number, located in the user's account entry within the /etc/passwd file, specifies the user's primary group.
Each user can also belong to up to 15 additional groups, known as secondary groups. In the /etc/group file, you can add users to group entries, thus establishing the user's secondary group affiliations.
Note (4 PSARC/2009/542):
his project proposes changing the maximum value for NGROUPS_MAX from 32 to 1024 by changing the definition of NGROUPS_UMAX from 32 to 1024.
The use for a larger number of groups is described in CR 4088757, particular in the case of Samba servers and ADS clients; the Samba servers map every SID to a Unix group. Users with more than 32 groups SIDs are common. We've seen reports varying from
"64 is enough", "128 is absolutely enough" and "we've users with more 190 group SIDS).
NGROUPS_MAX as defined by different Unix versions are as follows (http://www.j3e.de/ngroups.html):
Linux Kernel >= 2.6.3 65536
Linux Kernel < 2.6.3 32
Tru64 / OSF/1 32
IBM AIX 5.2 64
IBM AIX 5.3 ... 6.1 128
OpenBSD, NetBSD, FreeBSD, Darwin (Mac OS X) 16
Sun Solaris 7, 8, 9, 10 16 (can vary from 0-32)
HP-UX 20
IRIX 16 (can vary from 0-32)
Plan 9 from Bell Labs 32
Minix 3 0 (Minix-vmd: 16)
QNX 6.4 8
NEW QUESTION 91
The storage pool configuration on your server is:
You back up the /pool1/data file system, creating a snapshot and copying that snapshot to tape
(/dev/rmt/0). You perform a full backup on Sunday night and Incremental backups on Monday through Saturday night at 11:00 pm. Each incremental backup will copy only the data that has been modified since the Sunday backup was started.
On Thursday, at 10:00 am, you had a disk failure. You replaced the disk drive (c4t0d0). You created pool (pool1) on that disk.
Which option would you select to restore the data in the /pool1/data file system?
- A. Load the Sunday tape and restore the Sunday snapshot: zfs recv pooll/data < /dev/rmt/0 zfs rollback pool1/data@mon Load the Wednesday tape and restore the Wednesday snapshot: zfs recv -i pooll/data < /dev/rmt/0 zfs rollback pool1/data@wed
- B. Load the Sunday tape and enter: zfs recv pool1/data < /dev/rmt/0 Load the Wednesday tape and enter:
* commands missing* - C. zfs create pool1/data Load the Monday tape and enter: zfs recv pool1/data < /dev/rmt/0 Load the Wednesday tape and enter: zfs recv -F pool1/data < /dev/rmt/0
- D. zfs create pooll/data Load the Wednesday tape and enter: zfs recv -F pool1/data < /dev/rmt/0
Answer: B
Explanation:
First the full backup must be restored. This would be the Sunday backup.
Then the last incremental backup must be restored. This would be the Wednesday backup.
Before restoring the Wednesday incremental file system snapshot, the most recent snapshot must first be rolled back.
By exclusion D) would be best answer even though it is incomplete.
NEW QUESTION 92
You have been asked to terminate a process that appears to be hung and will not terminate. The process table is shown below:
root 15163 15156 0 12:51:15 pts/3 0:00 hungscript
What command will terminate the process?
- A. kill -1 15163
- B. kill -2 15163
- C. kill -9 15163
- D. kill -15 15163
Answer: C
Explanation:
Explanation/Reference:
Explanation:
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 -15 (SIGKILL).
Using the -9 signal (SIGTERM) with the kill command ensures that the process terminates promptly.
However, the -9 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.
NEW QUESTION 93
Which five statements describe options available for installing the Oracle Solaris 11operating system using the installation media?
- A. The GUI installer cannot be used to upgrade your operating system from Solaris 10.
- B. You can perform a text or LiveCD installation locally or over the network.
- C. If you are installing Oracle Solaris 11 on an x86-based system that will have more than one operating system installed in it, you cannot partition your disk during the installation process.
- D. The LiveCD installer cannot be used if you need to preserve a specific Solaris Volume Table of Contents (VTOC) slice in your current operating system.
- E. The LiveCD Installation cannot be used to install multiple instances of Oracle Solaris.
- F. The LiveCD Installer is for x86 platforms only.
- G. The text Installer does not install the GNOME desktop. The GNOME desktop package must he added after you have installed the operating system.
- H. The LiveCD installer can be used for SPARC or x86 platforms.
Answer: A,B,D,G
Explanation:
A: If the network is setup to perform automated installations, you can perform a text installation over the network by setting up an install service on the network and selecting a text installation when the client system boots.
B: After a fresh install of Solaris 11 express, only the console mode is activated. To add Gnome, simply do :
$ sudo pkg install slim_install This will install additional packages that are not installed by default.
D: The text installer advantages over the GUI installer include:
* In addition to modifying partitions, the text installer enables you to create and modify VTOC slices within the Solaris partition.
F: How do I upgrade my Solaris 10 or lower systems to Solaris 11?
Unfortunately, you CAN'T. There is no direct upgrade installer or other tool that will allow you to upgrade from earlier releases of Solaris to Solaris 11. This is primarily due to the vast changes in the packaging mechanism in Solaris 10.
Reference: Oracle Solaris 11 Information Library, Comparing Installation Options
NEW QUESTION 94
United States of America export laws include restrictions on cryptography.
Identify the two methods with which these restrictions are accommodated in the Oracle Solaris 11 Cryptographic Framework.
- A. Corporations must utilize signed X.509 v3 certificates.
- B. A third-party provider object must be signed with a certificate issued by Oracle.
- C. Loadable kernel software modules must register using the Cryptographic Framework SPI.
- D. Systems destined for embargoed countries utilize loadable kernel software modules that restrict encryption to 64 bit keys.
- E. Third-party providers must utilize X.509 v3 certificates signed by trusted Root Certification Authorities.
Answer: B,C
Explanation:
B: Binary Signatures for Third-Party Software
The elfsign command provides a means to sign providers to be used with the Oracle Solaris Cryptographic Framework. Typically, this command is run by the developer of a provider.
The elfsign command has subcommands to request a certificate from Sun and to sign binaries. Another subcommand verifies the signature. Unsigned binaries cannot be used by the Oracle Solaris Cryptographic Framework. To sign one or more providers requires the certificate from Sun and the private key that was used to request the certificate.
C: Export law in the United States requires that the use of open cryptographic interfaces be restricted. The Oracle Solaris Cryptographic Framework satisfies the current law by requiring that kernel cryptographic providers and PKCS #11 cryptographic providers be signed.
NEW QUESTION 95
Which three statements accurately describe the Automated Installation (AI) client?
- A. Any manifest or script in a service can be designated to be the default for that service.
- B. If the AI client does not match any criteria to use a custom manifest or script, the automated installation aborts.
- C. If the AI client does not match any criteria to use a custom manifest or script, the default manifest is used.
- D. Only the default.xml file is used as the default AT client manifest.
- E. If a client system does not use any SC profile, then the install server will use the default SC profile.
- F. If a client system does not use any SC profile, then an interactive tool opens on that client at first boot after that client installation to complete the configuration of that client.
Answer: A,C,F
Explanation:
Each client uses one and only one AI manifest to complete its installation. The AI manifest is selected for a client according to the following algorithm:
* If no custom AI manifests are defined for this install service, the default AI manifest is used. The default AI manifest is not associated with any client criteria etc.
Each client can use any number of system configuration profiles. If a client system does not use any configuration profile, then an interactive tool opens on that client at first boot after that client installation to complete the configuration of that client.
NEW QUESTION 96
You need to update an OS image on a client. The pkg publishers command displays the wrong publisher with the wrong update:
PUBLISHERTYPESTATUSURI
Solaris origin onlinehttp://pkg.oracle.com/solaris/release
The update is available on the updated publisher:
PUBLISHERTYPESTATUSURI
Solaris originonlinehttp://sysA.example.com
Select the option that describes the procedure used to update the OS image on the system from the updated publisher.
- A. Use the pkg set-publisher command to change the URL of the publisher Solaris to http://sysA.example.com.
Issue the pkg update command to update the OS image. - B. Add the new publisher http://sysA.example.com SolarisUse the pkg set-publisher command to set the publisher search order and place http://sysA.example.com of http://pkg.oracle.com/solaris/releaseIssue the pkg publisher command to view the publishers. Set the new publisher to sticky.Issue the pkg update command to update the OS image.
- C. Copy the repository from the ISO image onto the local client. Configure the repository on the client by using the svccfg - s command so that the Solaris publisher is connected to the new repository. Refresh the application/pkg/server service.Issue the pkgrepo refresh command to refresh the repository catalog
- D. Configure the publisher on the client using the svcfg - s command so that the Solaris publisher is connected to the repository at http://sysA.example.comRefresh the application/pkg/server service. Issue the pkgrepo refresh command to repository catalog
Answer: A
Explanation:
Explanation
Explanation:
You can use the pkg set-publisher command to change a publisher URI.
Changing a Publisher Origin URI
To change the origin URI for a publisher, add the new URI and remove the old URI. Use the -g option to add a new origin URI. Use the -G option to remove the old origin URI.
# pkg set-publisher -g http://pkg.example.com/support \
-G http://pkg.example.com/release example.com
Note: You can use either the install or update subcommand to update a package.
The install subcommand installs the package if the package is not already installed in the image. If you want to be sure to update only packages that are already installed, and not install any new packages, then use the update subcommand.
NEW QUESTION 97
To confirm the IP addresses and netmasks have been correctly configured on the network interfaces, which command(s) should you use?
- A. ipadm show-config
- B. ipadm show-ipipadm show-mask
- C. ipadm show-if
- D. ipadm show-addr
- E. ipadm show-nic
- F. ipadm show-addripadm show-mask
Answer: D
Explanation:
Show address information, either for the given addrobj or all the address objects configured on the specified interface, including the address objects that are only in the persistent configuration.
Example:
# ipadm show-addr
ADDROBJ TYPE STATE ADDR
lo0/v4 static ok 127.0.0.1/8
lo0/v6 static ok ::1/128
NEW QUESTION 98
zone1 is a non-global zone that has been configured and installed.
zone1 was taken down for maintenance, and the following command was run:
zoneadm -z zone1 mark incomplete
The following information is displayed when listing the zones on your system:
Which task needs to be performed before you can boot zone1?
- A. The zone needs to be brought to the ready state.
- B. The zone needs to be brought to the complete state.
- C. The zone needs to be installed.
- D. The zone needs to be uninstalled and reinstalled.
Answer: D
Explanation:
If administrative changes on the system have rendered a zone unusable or inconsistent, it is possible to change the state of an installed zone to incomplete.
Marking a zone incomplete is irreversible. The only action that can be taken on a zone marked incomplete is to uninstall the zone and return it to the configured state.
NEW QUESTION 99
You need to install the gzip software package on your system. Which command would you use to find the software package in the configured repository?
- A. pkg info gzip
- B. pkg contents gzip
- C. yum list gzip
- D. pkginfo gzip
- E. pkg search gzip
Answer: E
Explanation:
Use the pkg search command to search for packages whose data matches the specified pattern.
Like the pkg contents command, the pkg search command examines the contents of packages. While the pkg contents command returns the contents, the pkg search command returns the names of packages that match the query.
Reference: Oracle Solaris 11 Information Library, Searching for Packages
NEW QUESTION 100
You are currently working in both your home directory and the system directory /tmp. You are switch back and forth with full path names. Which pair of cd commands will provide you with a shortcut to switch between these two locations?
- A. cd and cd.
- B. cd ~ and cd
- C. cd ~ and cd -
- D. cd * and cd . .
Answer: C
Explanation:
In the Bourne Again, C, Korn, TC, and Z shells, the tilde (~) is used as a shortcut for specifying your home directory.
cd -
It's the command-line equivalent of the back button (takes you to the previous directory you were in).
Note:
To make certain that you are in your home directory, type the cd (change directory) command. This command moves you to your home (default) directory.
NEW QUESTION 101
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 variable settings in .profile take precedence over variable settings in .bashrc.
- B. genius will be kernighan, because .bashrc executes after .profile.
- C. genius will be thompson because /etc/profile system settings always override local settings.
- D. genius will be ritchie because .profile executes after .bashrc.
- E. genius will be ritchie, because that was the value exported in .profile.
Answer: A
NEW QUESTION 102
You need to migrate a UFS file system named /production_ufs to a ZFS file system named / production_ufs. The /production_ufs file system cannot be taken down or be out of production during the migration, and the current /production_ufs file system must remain active until the /ptoduction_zfs file system is copied and ready.
Which method allows you to meet both requirements?
1. Copy live data from /production_ufs to /production_zfs while /production_ufs is in use.
2. When the copy is complete, /production_zfs will contain an up-to date copy of /production_ufs
- A. Create the new zfs file system by using the zfs create -o shadow.
- B. Mirror the existing UFS file system by using SVM.After both submissions are in sync, migrate one of the submissions to a ZFS file System by using Live Upgrade.
- C. Create the new ZFS file system by using zfs create import to import data from the existing UFS file system into the new ZFS file system
- D. Create a new Boot Environment. Create the ZFS file system. Use lucreate -m to copy data from the Current UFS file system to the new ZFS file system.
- E. Create a snapshot of the UFS file system. Create the new ZFS file system. Use cpio to copy data from the snapshot to the new ZFS file system.
Answer: A
Explanation:
Explanation/Reference:
Explanation:
Migrating Data With ZFS Shadow Migration
ZFS shadow migration is a tool you can use to migrate data from an existing file system to a new file system. A shadow file system is created that pulls data from the original source as necessary.
You can use the shadow migration feature to migrate file systems as follows:
* A local or remote ZFS file system to a target ZFS file system
* A local or remote UFS file system to a target ZFS file system
Shadow migration is a process that pulls the data to be migrated:
* Create an empty ZFS file system.
* Set the shadow property on an empty ZFS file system, which is the target (or shadow) file system, to point to the file system to be migrated.
For example:
# zfs create -o shadow=nfs://system/export/home/ufsdata users/home/shadow2
* Data from file system to be migrated is copied over to the shadow file system.
NEW QUESTION 103
Oracle Solaris 11 kernel encounters a fatal error, and it results in a system panic. What type of file does this generate?
- A. core dump
- B. a.out
- C. tape dump
- D. objdump
- E. crash dump
Answer: A
Explanation:
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."
NEW QUESTION 104
You have a ticket from a new user on the system, indicating that he cannot log in to his account. The information in the ticket gives you both the username and password. The ticket also shows that the account was set up three days ago.
As root, you switch users to this account with the following command:
su - newuser
You do not get an error message.
You then run 1s -1a and see the following files:
local1.cshrc local1.login local1.profile .bash_history .bashrc .profile
As root, you grep the /etc/passwd file and the /etc/shadow file for this username, with these results:
/etc/passwd contains newuser:x:60012:10:/home/newuser:/usr/bin/bash
/etc/shadow contains newuser:UP: : : : :10: :
As root, what is your next logical step?
- A. useradd -D
- B. mkdir /home/newuser
- C. passwd newuser
- D. Usermod -f 0
Answer: C
Explanation:
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.
Reference: man passwd
NEW QUESTION 105
View the Exhibit and review the disk configuration.
The following command is executed on the disk:
zpool create pool1 c3t3d0s0
What is the result of executing this command?
- A. The disk will contain an EFI disk label.
- B. A 1-GB ZFS file system named /pool1 is created.
- C. A 15.97-GB storage pool named pool1 is created.
- D. A zpool create error is generated.
Answer: B
NEW QUESTION 106
The su command by default makes an entry into the log file for every su command attempt. The following is a single line from the file:
SU 12/18 23:20 + pts/1 user1-root
What does the + sign represent?
- A. unsuccessful attempt
- B. successful attempt
- C. The attempt was from a pseudo terminal, and not the console.
- D. The attempt was from a user that is in the adm group, same as root.
- E. Time zone is not set.
Answer: B
Explanation:
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 <userid>-root
Reference: /var/log/sulog, Solaris System Logs
NEW QUESTION 107
Which two statements are true concerning the network stack on Oracle Solaris 11?
- A. IP addresses are assigned to datalinks.
- B. A single IP interface can have either an IPv4 address or an IPv6 address but not both.
- C. A single IP interface can have both an IPv4 address and an IPv6 address.
- D. A single datalink can have only one IP interface.
- E. Hardware network interfaces and datalinks have a one-to-one relationship.
Answer: C,E
NEW QUESTION 108
View the exhibit to inspect the file system configuration on your server.
View the Exhibit to inspect the file system configuration on your server.
Your department's backup policy is to perform a full backup to a remote system disk on Saturday.
On Sunday through Friday, you are to perform a differential backup to the same remote system disk:
Following your company policy, which option describes a valid procedure for backing up the /data file system to a remote disk named /remote/backup?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: C
NEW QUESTION 109
Which two options accurately describe the network characteristics of a zone?
- A. IPMP cannot be managed within the non-global zone.
- B. Exclusive IP is the default type of network configuration.
- C. By default, all IP addresses, netmasks, and routes are set by the global zone and cannot be altered in a non global zone.
- D. Shared IP is the default type of network configuration.
- E. DHCP address assignment cannot be configured in a shared IP zone.
- F. Commands such as snoop and dladm cannot be used on datalinks that are in use by a running zone.
Answer: D,E
Explanation:
Explanation/Reference:
Explanation:
A: Non-global zones can not utilize DHCP (neither client nor server).
B (not C): By default, non-global zones will be configured with a shared IP functionality. What this means is that IP layer configuration and state is shared between the zone you're creating and the global zone. This usually implies both zones being on the same IP subnet for each given NIC.
Note: A zone is a virtual operating system abstraction that provides a protected environment in which applications run. The applications are protected from each other to provide software fault isolation. To ease the labor of managing multiple applications and their environments, they co-exist within one operating system instance, and are usually managed as one entity.
The original operating environment, before any zones are created, is also called the "global zone" to distinguish it from non-global zones, The global zone is the operating system instance.
Incorrect answer:
E: Exclusive-IP zones can use IPMP. IPMP is configured the same way in an exclusive-IP zone as it is on a system not using zones.
For shared-IP zones, IPMP can be configured in the global zone.
F: Full IP-level functionality is available in an exclusive-IP zone.
An exclusive-IP zone has its own IP-related state.
An exclusive-IP zone is assigned its own set of data-links using the zonecfg command. The zone is given a data-link name such as xge0, e1000g1, or bge32001, using the physical property of the net resource. The address property of the net resource is not set.
Note that the assigned data-link enables the snoop command to be used.
The dladm command can be used with the show-linkprop subcommand to show the assignment of data- links to running exclusive-IP zones.
NEW QUESTION 110
......
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