Ultimate Guide to Prepare 1Z0-821 Certification Exam for Oracle Solaris in 2021
Use Real 1Z0-821 Dumps - Oracle Correct Answers updated on 2021
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NEW QUESTION 101
Which two options are characteristics of a fast reboot?
- A. A fast reboot can only be executed on the SPARC platform when the config/fastreboot_default property for the svc:/system/boot-config:default service is set to true.
- B. A fast reboot bypasses grub.
- C. A fast reboot is the default on all platforms.
- D. A fast reboot cannot be used after a system panic on the x86 platform.
- E. A fast reboot uses an in-kernel boot loader to load the kernel into memory.
Answer: A,E
Explanation:
C: To change the default behavior of the Fast Reboot feature on the SPARC platform,so that a fast reboot is automatically performed when the system reboots,see below.
The following example shows how to set the property's value to true on the SPARC platform,so that a fast reboot is initiated by default:
# svccfg -s "system/boot-config:default" setprop config/fastreboot_default=true # svcadm refresh svc:/system/boot-config:default
D: Fast Reboot implements an in-kernel boot loader that loads the kernel into memory and
then switches to that kernel.
The firmware and boot loader processes are bypassed,which enables the system to reboot
within seconds.
The Fast Reboot feature is managed by SMF and implemented through a boot configuration service,svc:/system/boot-config. The boot-config service provides a means for setting or changing the default boot configuration parameters. When the config/fastreboot_default property is set to true,the system performs a fast reboot automatically,without the need to use the reboot -f command. This property's value is set to true on the x86 platform. For task-related information,including how to change the default behavior of Fast Reboot on the SPARC platform,see Accelerating the Reboot Process on an x86 Based System.
Note: One new feature,called Fast Reboot,will allow the system to boot up without doing the routine set of hardware checks,a move that can make system boot times up to two-anda-half times faster,Oracle claimed. This feature can be handy in that an administrator applying a patch or software update across thousands of Solaris deployments can reboot them all the more quickly.
NEW QUESTION 102
Which operation will fail if the DNS configuration is incorrect?
- A. ping localhost.
- B. ping 192.168.1.1
- C. ping www.oracle.com.
- D. domainname
- E. ping 23.45.82.174
- F. cat /etc/resolv.conf
Answer: C
Explanation:
Explanation/Reference:
Explanation:
www.oracle.com would have to be resolved to an IP name by the domain name service.
NEW QUESTION 103
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. /var/spool/cron/atjobs
- B. /var/spool/cron
- C. /var/spool/cron/crontable
- D. /etc/cron.d
Answer: D
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 104
User jack makes use of the bash shell; his home directory is/export/home/jack.
What is the correct setting of umask, and where should it be set, to allow jack to create a shell script using the vi editor, that is executable by default?
- A. umask value of 0002 set in /etc/profile
- B. umask value of 0002 set in /export/home/jack/.bashrc
- C. umask value of 0722 set in /etc/profile
- D. umask value of 0722 set In /export/home/jack/.bashrc
- E. It is not possible to make a script executable without using the chmod command.
Answer: A
Explanation:
The user file-creation mode mask (umask) is use to determine the file permission for newly created files. It can be used to control the default file permission for new files. It is a four- digit octal number.
You can setup umask in /etc/bashrc or /etc/profile file for all users. By default most Unix distro set it to 0022 (022) or 0002 (002).
1. The default umask 002 used for normal user. With this mask default directory permissions are 775 and default file permissions are 664.
2 . The default umask for the root user is 022 result into default directory permissions are
7 55 and default file permissions are 644.
3 . For directories, the base permissions are (rwxrwxrwx) 0777 and for files they are 0666 (rw-rw-rw).
In short,
1. A umask of 022 allows only you to write data, but anyone can read data.
2. A umask of 077 is good for a completely private system. No other user can read or write your data if umask is set to 077.
3 . A umask of 002 is good when you share data with other users in the same group.
Members of your group can create and modify data files; those outside your group can read data file, but cannot modify it. Set your umask to 007 to completely exclude users who are not group members.
NEW QUESTION 105
You are attempting to edit your crontab file in the bash shell. Instead of getting your usual vi interface, you are presented with an unfamiliar interface. In order to have your editor of choice-viwhat command must you type after exiting the unfamiliar editor?
- A. EDITOR=vi
- B. crontab - e vi
- C. crontab=vi
- D. env
Answer: A
Explanation:
Set the EDITOR variable to vi.
Commands like `crontab -e` will use ed per default. If you'd like to use some better editor (like vi)
you can use the environment variable EDITOR:
# EDITOR=vi; crontab -e will open the users crontab in vi. Of course you can set this variable
permanently.
Incorrect answers
C: -e Edits a copy of the current user's crontab file, or creates an empty file to edit if crontab does not exist. When editing is complete, the file is installed as the user's crontab file. If a username is given, the specified user's crontab file is edited, rather than the current user's crontab file; this can only be done by a user with the solaris.jobs.admin authorization. The environment variable EDITOR determines which editor is invoked with the -e option. The default editor is ed(1). All crontab jobs should be submitted using crontab. Do not add jobs by just editing the crontab file, because cron is not aware of changes made this way.
Reference: Setting the default editor
NEW QUESTION 106
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. zfs create pool1/dataLoad the Monday tape and enter:zfs recv pool1/data < /dev/rmt/0Load the Wednesday tape and enter:zfs recv -F pool1/data < /dev/rmt/0
- B. Load the Sunday tape and restore the Sunday snapshot:zfs recv pooll/data < /dev/rmt/0zfs rollback pool1/data@monLoad the Wednesday tape and restore the Wednesday snapshot:zfs recv -i pooll/data
< /dev/rmt/0zfs rollback pool1/data@wed - C. zfs create pooll/dataLoad the Wednesday tape and enter:zfs recv -F pool1/data < /dev/rmt/0
- D. Load the Sunday tape and enter:zfs recv pool1/data < /dev/rmt/0Load the Wednesday tape and enter:* commands missing*
Answer: D
Explanation:
Explanation/Reference:
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 107
After installing the OS, the following network configuration information is displayed from the system:
Which option describes the state of this server?
- A. The manual network configuration option was chosen during the installation of the OS.
- B. The network interface is configured with a static IP address.
- C. The automatic network configuration option was chosen during the installation of the OS.
- D. The network was not configured during the installation of the OS.
Answer: D
Explanation:
Explanation/Reference:
Explanation:
Only the loopback addresses are configured. No IP address is configured.
NEW QUESTION 108
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 logical object used for IP Multipathing
- D. a device that provides Classless Inter-Domain Routing
Answer: C
Explanation:
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 & 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:
NEW QUESTION 109
You have been asked to do an orderly shutdown on a process with a PID of 1234, with the kill command.
Which command is best?
- A. kill -9 1234
- B. kill -1 1234
- C. kill -2 1234
- D. kill -15 1234
Answer: D
Explanation:
Explanation/Reference:
Explanation:
On POSIX-compliant platforms, SIGTERM is the signal sent to a process to request its termination. The symbolic constant for SIGTERM is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms, however on the vast majority of systems, SIGTERM is signal #15.
SIGTERM is the default signal sent to a process by the kill or killall commands. It causes the termination of a process, but unlike the SIGKILL signal, it can be caught and interpreted (or ignored) by the process.
Therefore, SIGTERM is akin to asking a process to terminate nicely, allowing cleanup and closure of files.
For this reason, on many Unix systems during shutdown, init issues SIGTERM to all processes that are not essential to powering off, waits a few seconds, and then issues SIGKILL to forcibly terminate any such processes that remain.
NEW QUESTION 110
You need to make sure that all of the software packages on your server are up to date. Without installing any updates, which two commands would display .my software updates that are available in the default Oracle repository?
- A. pkg search-u
- B. pkg verify-u'*'
- C. pkglist-u
- D. pkg install-nv
- E. pkginfo-r'*'
- F. pkg update -nv '*'
Answer: C,E
Explanation:
A: the pgk list command display a list of packages in the current image, including state and other information. By default, package variants for a different architecture or zone type are excluded.
D: pkginfo displays information about software packages that are installed on the system (with the first synopsis, with -l) or that reside on a particular device or directory (with the second synopsis, with -r).
Without options, pkginfo lists the primary category, package instance, and the names of all completely installed and partially installed packages. It displays one line for each package selected.
With -r, retrieve the data from the repositories of the image's configured publishers. Note that you must specify one or more package patterns in this case.
Reference: pkg(1) Man Page
NEW QUESTION 111
dbzone is currently running on your server.
Which two methods would you use to safely and cleanly shut down dbzone and all of its applications?
- A. zoneadm -z dbzone shutdown
- B. zoneadm -z dbzone halt
- C. zlogin dbzone shutdown -i0
- D. zoneadm -z dbzone shutdown -i0
- E. zlogin -z dbzone halt
Answer: B,C
Explanation:
D: zoneadm halt command halts the specified zones. halt bypasses running the shutdown
scripts inside the zone. It also removes run time resources of the zone.
E: Use: zlogin zone shutdown
to cleanly shutdown the zone by running the shutdown scripts.
Use this procedure to cleanly shut down a zone.
1.Become superuser,or assume the Primary Administrator role.
2.Log in to the zone to be shut down,for example,my-zone,and specify shutdown as the name of the utility and init 0 as the state global# zlogin my-zone shutdown -y -g0 -i 0
NEW QUESTION 112
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. The zone uses a virtual network interface.
- B. It is a native zone.
- C. It is a whole root zone.
- D. The IP address of the zone is 10.0.2.18.
- E. The hostid is the same as the global zone.
- F. It is an immutable zone.
- G. It is a sparse root zone.
- H. The zone shares the network interface with the host.
Answer: E,F,H
Explanation:
Explanation/Reference:
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 113
Identify three differences between the shutdown and init commands.
- A. Only shutdown sends a shutdown message to any systems that are mounting resources from the system that is being shut down.
- B. The shutdown command will shut the system down and turn off power; init will only shut the system down.
- C. The shutdown command can only bring the system to the single-user milestone. The init command must be used to shut the system down to run level 0.
- D. Only shutdown broadcasts a final shutdown warning to all logged-in users.
- E. init does not terminate all services normally. The shutdown command performs a cleaner shutdown of all services.
Answer: B,D,E
NEW QUESTION 114
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. 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.
- B. 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
- C. 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.
- D. Create the new zfs file system by using the zfs create -o shadow.
- 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: D
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 115
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. If you provide a username, root is an account rather than a role and is set to expire immediately.
- B. If you provide a username, that user is given root privileges.
- C. If you provide a username, that user is assigned the root role.
- D. Creating a user account is optional.
- E. The root password must be set and cannot be blank.
- F. If you do not provide a username, root is an account rather than a role and is set to expire
immediately. - G. The root password can be left blank.
Answer: C,D,E,F
Explanation:
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.
Reference: Oracle Solaris 11 Information Library, Installing With the Text Installer, Complete the User panel.
NEW QUESTION 116
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. echo 192.168.1.1 >/etc/defaultrouter
- B. echo 192.168.1.1 >/etc/gateway
- C. ipadm set-gateway 192.168.1.1
- D. dladm route-add -d 192.168.1.1
- E. route add default 192.168.1.1
- F. ipadm set-default 192.168.1.1
Answer: A,E
Explanation:
Explanation/Reference:
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 117
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. Systems destined for embargoed countries utilize loadable kernel software modules that restrict encryption to 64 bit keys.
- 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. Corporations must utilize signed X.509 v3 certificates.
- 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 118
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