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Oracle 1Z0-821 Exam Syllabus Topics:
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NEW QUESTION 54
View the Exhibit to inspect the boot environment Information displayed within a non global zone on your system.
Which two options describe the solaris-1 boot environment?
- A. The solaris-1 boot environment is associated with a non active global zone boot environment.
- B. The solaris-1 boot environment was created automatically when the non global zone was created.
- C. The solaris-1 boot environment is not bootable.
- D. The solaris-1 boot environment was created in the non-global zone using the beadm create command.
- E. The solaris-1 boot environment is incomplete.
Answer: C,D
Explanation:
A: The - of the Active Column indicates that this boot environment is inactive, and hence not bootable.
Note: The values for the Active column are as follows:
R - Active on reboot.
N - Active now.
NR - Active now and active on reboot.
"-" - Inactive.
"!" - Unbootable boot environments in a non-global zone are represented by an exclamation point.
D: beadm create
Creates a new boot environment name, beName.
Note: beadm list
Lists information about the existing boot environment, which is be Name, or lists information for all
boot environments if be Name is not provided.
Note: Using beadm Utility (Tasks)
You can use the beadm utility to create and manage snapshots and clones of your boot
environments.
Note the following distinctions relevant to boot environment administration:
*A snapshot is a read-only image of a dataset or boot environment at a given point in time. A snapshot is not bootable.
*A boot environment is a bootable Oracle Solaris environment, consisting of a root dataset and, optionally, other datasets mounted underneath it. Exactly one boot environment can be active at a time.
*A clone of a boot environment is created by copying another boot environment. A clone is bootable.
Reference: Creating and Administering Oracle Solaris 11 Boot Environments
NEW QUESTION 55
You wish to edit your crontab file that is located in /var/spool/cron/crontab. What command must you enter to edit this file?
- A. crontab -e /etc/default/cron
- B. crontab -e /var/spool/cron/crontab
- C. crontab -e
- D. crontab -r
Answer: C
Explanation:
The main tool for setting up cron jobs is the crontab command,though this is not available on every Unix variant. Typically under Solaris or Linux one would create a new crontab or edit an existing one,using the command; crontab -e
Use the ls -l command to verify the contents of the/var/spool/cron/crontabs file.
NEW QUESTION 56
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. the PID for the current shell
- C. /usr/bin/ksh
- D. $SHELL
Answer: D
Explanation:
Explanation/Reference:
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 57
Consider the following rule file for use with the Basic Audit Reporting Tool (BART).
CHECK all
IGNORE dirmtime
/etc/security
/etc/notices
IGNORE contents
/export/home
IGNORE mtime size contents
/var
CHECK
You are using BART to detect inappropriate changes to the file system.
Identify the two correct statements describing the attributes recorded.
- A. /var/dhcp Attribute: size uid gid mode acl
- B. /etc/hosts Attributes: size uid gid mode acl intime dest
- C. /export/home/rick/.profile Attributes: size uid gid mode acl mtime contents
- D. /export/home/kate/.profile Attributes: uid gid mode acl dirmtime
- E. /etc/security/exec_attr Attribute: size uid mode acl mtime devnode
- F. /var/spool/mqueue Attribute: size uid gid mode acl dirmtime
Answer: C,E
Explanation:
D: According to line /etc/security
F: According to line /export/home Not E: According to line IGNORE dirmtime Note: In default mode, the bart compare command, as shown in the following example, checks all the files installed on the system, with the exception of modified directory timestamps (dirmtime):
CHECK all IGNORE dirmtime Note 2: The Basic Audit Reporting Tool (BART) feature of Oracle Solaris enables you to comprehensively validate systems by performing file-level checks of a system over time. By creating BART manifests, you can easily and reliably gather information about the components of the software stack that is installed on deployed systems.
BART is a useful tool for integrity management on one system or on a network of systems.
Reference: Oracle Solaris Administration: Security Services, BART Manifests, Rules Files, and Reports (Reference)
NEW QUESTION 58
The line set noexec_user_stack= l
should be added to the /etc/system file to prevent an executable stack while executing user programs. What is the purpose of this?
- A. help prevent core dumps on program errors
- B. help makebuffer-overflow attacks more difficult
- C. help programs to execute more quickly by keeping to their own memory space
- D. log any messages into the stack log
Answer: B
Explanation:
How to Disable Programs From Using Executable Stacks
Purpose: Prevent executable stack from overflowing.
You must be in the root role.
Edit the /etc/system file, and add the following line:
set noexec_user_stack=1
Reboot the system.
# reboot
Reference: How to Disable Programs From Using Executable Stacks
NEW QUESTION 59
Which two are true about accounts, groups, and roles in the Solaris user database?
- A. A Solaris account name may be any alphanumeric string, and can have a maximum length of 8 characters.
- B. All Solaris user accounts must have a unique UID number.
- C. The groups that an account is a member of are determined by the entries in the
/etc/group file. - D. The GID for an account determines the default group ownership of new files created by that account.
- E. Account UID numbers 0-09 are system-reserved.
Answer: A,B
Explanation:
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.
NEW QUESTION 60
The advantage of core tiles is that they allow you an opportunity to examine the cause of problems, so that they can be resolved.
However, core files must be managed because they_____.
- A. take up large amounts of disk space
- B. steal resources from the processor, slowing down system performance
- C. fill up swap space; this will begin to slow the system due to swaps
- D. fill up swap space; this will begin to slow the system due to paging
- E. make numerous entries into the /var/adm/wtmpx file
Answer: A
Explanation:
Explanation/Reference:
Explanation:
Part of the job of cleaning up heavily loaded file systems involves locating and removing files that have not been used recently. You can locate unused files by using the ls or find commands.
Other ways to conserve disk space include emptying temporary directories such as the directories located in /var/tmp or /var/spool, and deleting core and crash dump files.
Note: Core files are generated when a process or application terminates abnormally. Core files are managed with the coreadm command.
For example, you can use the coreadm command to configure a system so that all process core files are placed in a single system directory. This means it is easier to track problems by examining the core files in a specific directory whenever a process or daemon terminates abnormally.
NEW QUESTION 61
View the Exhibit and review the file system information displayed from a remote server.
You are configuring a new server. This new server has the following storage pool configured:
This new server also has the following file systems configured:
When you are finished building this new server, the pool1/data dataset must be an exact duplicate of note server. What is the correct procedure to create the pool1/data dataset on this new server?
- A. zfs create -o mountpoint=/data -o refquota=1g pool1/data
- B. zfs set mountpoint=none pool1zfs create pool1/data
- C. zfs set mountpoint=none pool1zfs create -o mountpoint=/data -o quota=1g pool1/data
- D. zfs create quota=1g pool1/data
- E. zfs set quota=1g pool1/data
- F. zfs create mountpoint=/data pool1/data
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 62
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. The number of groups one user can concurrently belong to is unlimited in Solaris 11.
- B. 0
- C. 1
- D. 2
- E. 3
- F. 4
- G. 5
Answer: C
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 63
User jack on host solaris attempts to use ssh to log in to host oracle and receives this message:
jack@solaris:~$ ssh oracle
ssh: connect to host oracle port 22: connection refused
What is the problem?
- A. Host oracle is not running the ssh service.
- B. Host solaris does not have a valid host public key.
- C. Host oracle does not have a valid host private key.
- D. Host solaris is not configured for host-based authentication.
- E. Host oracle does not have a valid host public key.
- F. Host does not have a valid host private key.
- G. Host solaris is not running the ssh service.
- H. Host oracle is not configured for host-based authentication.
Answer: A
Explanation:
Explanation/Reference:
Explanation:
The host he is trying to connect to (oracle) is not running the required service (ssh).
NEW QUESTION 64
The COMSTAR framework provides support for the iSCSI protocol.
Select three options that correctly describe the COMSTAR framework.
- A. Large amounts of data can be transferred over an IP network with very little network degradation.
- B. COMSTAR allows you to convert any Solaris11 host into a SCSI target device that can be accessed over a storage network.
- C. iSCSI devices can be used as dump devices.
- D. SCSI commands are carried over IP networks and enable you to mount disk devices from across the network onto your local system.
- E. One IP port can handle multiple ISCSI target devices.
Answer: B,D,E
Explanation:
B: By carrying SCSI commands over IP networks,the iSCSI protocol enables you to access block devices from across the network as if they were connected to the local system. COMSTAR provides an easier way to manage these iSCSI target devices.
D: Common Multiprotocol SCSI TARget,or COMSTAR,a software framework that enables you to convert any Oracle Solaris 11 host into a SCSI target device that can be accessed over a storage network by initiator hosts.
E: One IP port can handle multiple iSCSI target devices.
NEW QUESTION 65
The following line is from /etc/shadow in a default Solaris 11 Installation:
jack: $5$9JFrt54$7JdwmO.F11Zt/ jFeeOhDmnw93LG7Gwd3Nd/cwCcNWFFg:0:15:30:3:::
Which two are true?
- A. The minimum lifetime for a password for account jack is 15 days.
- B. Passwords for account jack must be a minimum of 15 characters long.
- C. A history of 3 prior passwords for the account jack is kept to inhibit password reuse.
- D. The password for account jack has expired.
- E. The password for account jack has 5 characters.
Answer: A,D
Explanation:
From the content of the /etc/shadow file we get:
* username: jack
* encrypted password: $5$9JFrt54$7JdwmO.F11Zt/
jFeeOhDmnw93LG7Gwd3Nd/cwCcNWFFg
* Last password change (lastchanged): Days since Jan 1, 1970 that password was last changed: 0
* Minimum: The minimum number of days required between password changes i.e. the number of days left before the user is allowed to change his/her password: 15 Maximum: The maximum number of days the password is valid (after that user is forced to change his/her password): 30 Warn : The number of days before password is to expire that user is warned that his/her password must be changed: 3
* Inactive : The number of days after password expires that account is disabled
* Expire : days since Jan 1, 1970 that account is disabled i.e. an absolute date specifying when the login may no longer be used
NEW QUESTION 66
View the Exhibit to see the information taken from the installation log file.
Based on the information presented in the Exhibit, which two options describe the state of the system when the server is booted for the first time after the installation is complete?
- A. The network/physical service is offline.
- B. You will be prompted to configure the network interface after the initial login.
- C. You cannot log in from the console as root. You must first loginas a user and then su to root account.
- D. The root user can log in from the console login.
- E. NWAM will be used to configure the network interface.
Answer: B,C
Explanation:
C (not D):Solaris 11 create user account and does not allow ssh root login by default. Note:Oracle Solaris 11 uses profile-based network configuration, which is comprised of two network configuration modes: manual (fixed) and automatic (reactive). Depending on which network configuration mode you choose during an installation, either the DefaultFixed network configuration profile (NCP) or the Automatic NCP is activated on the system. If the DefaultFixed NCP is active, the network is manually configured by using the dladm and ipadm commands . If the Automatic NCP or a user-defined NCP that you previously created is active, the netcfg and netadm commands (formerly nwamcfg and nwamadm) are used to create and manage network configuration.
How the Network Is Configured During an Installation
*For a GUI installation, the Automatic NCP is activated, and the network is automatically configured, based on current network conditions.
*For a text installation, you must choose Automatic, Manual, or None. **If you choose Automatic, the Automatic NCP is activated, and the network is automatically configured upon reboot. **If you choose Manual , the DefaultFixed NCP is activated, and you are presented with a series of installation screens that enable you to manually configure your network settings. **If you choose None, the DefaultFixed NCP is activated, but you do not provide network parameters during the installation. Thus, after a reboot, no network interface is plumbed or configured. Only the loopback IPv4 and IPv6 interfaces (lo0) are activated. You must manually configure your network by using dladm andipadm in this case.
Reference: How the Network Is Configured in Oracle Solaris 11
NEW QUESTION 67
Which network protocol is responsible for routing packets from one network to another?
- A. IP
- B. ICMP
- C. TCP
- D. UDP
- E. Ethernet
Answer: A
Explanation:
Explanation/Reference:
Explanation:
The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.
NEW QUESTION 68
A user jack, using a bash shell, requests a directory listing as follows:
jack@solaris: ~ $ 1s
dira dirb dirc diraa dirabc
Which three statements are correct?
- A. The pattern dir*a will expand to dira diraa.
- B. The pattern dir? will expand to dira dirb dirc.
- C. The pattern dir*a will expand to diraa.
- D. The pattern dir*b? will expand to dirb dirabc.
- E. The pattern dir*b? will expand to dirabc.
Answer: A,B,E
Explanation:
A: dir followed by a single letter.
C: dir followed by any characters ending with a.
D: dir followed by any characters, then character b, then one single character. only dirabc matches
NEW QUESTION 69
Identify the correct description of an IPS image.
- A. An ISO image of the Solaris media DVD
- B. An IPS repository
- C. A location where packages can be installed, for example, your Solaris instance
- D. A depot location or source where Solaris packages can be installed from
Answer: C
Explanation:
Explanation/Reference:
Explanation:
An image is a location where packages can be installed.
An image can be one of three types:
* Full images are capable of providing a complete system.
* Partial images are linked to a full image (the parent image), but do not provide a complete system on their own.
* User images contain only relocatable packages.
NEW QUESTION 70
You have Solaris 11 system with a host name of sysA and it uses LDAP as a naming service.
You have created a flash archive of sysA and you want to migrate this system to an Oracle Solaris11 server, Solaris10 branded zone.
The zone Status on the Oracle Solaris 11 server is:
-zone10 incomplete/zone/zone1solaris10exc1 Select the option that will force the non-global zone to prompt you for a host name and name service the first time it is booted.
- A. Use zonecfg to change the zonename before booting the system for the first time
- B. Use the - u option with the zoneadm - z zone10 attach command.
- C. Remove the sysidcfg file from the <zonepath>/root directory before booting the non-global zone.
- D. Use the -u option with the zoneadn -z zone10 install command.
Answer: D
Explanation:
Oracle Solaris 10 branded zones - Oracle Solaris 10 Zones provide an Oracle Solaris 10 environment on Oracle Solaris 11. You can migrate an Oracle Solaris 10 system or zone to a solaris10 zone on an Oracle Solaris 11 system in the following ways:
*Create a zone archive and use the archive to create an s10zone on the Oracle Solaris 11
system.
This option applies in the current scenario.
Example of command to Install the Oracle Solaris 10 non-global zone.
s11sysB# zoneadm -z s10zone install -u -a /pond/s10archive/s10.flar
*Detach the zone from the Oracle Solaris 10 system and attach the zone on the Oracle Solaris 11
zone. The zone is halted and detached from its current host. The zonepath is moved to the target
host, where it is attached.
Note:
install [-x nodataset] [brand-specific options]
A subcommand of the zoneadm.
Install the specified zone on the system. This subcommand automatically attempts to verify first. It
refuses to install if the verify step fails.
-u uuid-match
Unique identifier for a zone, as assigned by libuuid(3LIB). If this option is present and the argument is a non-empty string, then the zone matching the UUID is selected instead of the one named by the -z option, if such a zone is present.
Reference: Oracle Solaris 11 Information Library, Transitioning an Oracle Solaris 10 Instance to an Oracle Solaris 11 System
NEW QUESTION 71
User1 is attempting to assist user2 with terminating user2's process 1234.
User1 entered the following: kill -9 1234
Why does the process continue to run?
- A. You can kill a process only if you are root.
- B. You can kill only a process that you own.
- C. You can kill the process only with the pkill command.
- D. You need to kill the process with a stronger kill signal.
Answer: B
Explanation:
Kill -9
Kill (terminates without cleanup)
Only works if issued by process owner or super user (root)
The program cannot respond to this signal; it must terminate
Note: Unix provides security mechanisms to prevent unauthorized users from killing other processes. Essentially,for a process to send a signal to another,the owner of the signaling process must be the same as the owner of the receiving process or be the superuser.
NEW QUESTION 72
To confirm the IP address and netmask have been correctly configured on the network interfaces which command should you use?
- A. ipadm show-ifconfig
- B. ipdilm show-if
- C. ipadm show-nic
- D. ipadm show-addripadm show-mask
- E. ipadm show-addr
Answer: E
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.
State can be: disabled, down, duplicate, inaccessible, ok, tentative
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 73
Review the boot environments displayed on your system:
Which option describes the solaris-1 BE?
- A. It is active on the next reboot.
- B. It is active now.
- C. It is active now and on reboot.
- D. It is unbootable.
- E. It is inactive.
- F. It has been removed and will no longer be available after the next reboot.
Answer: C
Explanation:
In the below output, NR (now running) means the BE is active now and will be the
active BE on reboot.
Example:
Display your existing BE information.
# beadm list
BE Active Mountpoint Space Policy Created
solaris NR / 12.24G static 2011-10-04 09:42
NEW QUESTION 74
Review the boot environment information displayed on your system:
Which two options accurately describe the newBE boot environment?
- A. It cannot be renamed.
- B. You can create a snapshot of it.
- C. It cannot be destroyed.
- D. It has been deleted and will be removed at the next reboot.
- E. It cannot be activated.
- F. It is activated but unbootable.
Answer: A,E
Explanation:
Explanation/Reference:
Explanation:
If the boot environment is unbootable, it is marked with an exclamation point (!) in the Active column in the beadm list output.
The beadm command restricts actions on unbootable boot environments as follows:
You cannot activate an unbootable boot environment. (B)
You cannot destroy a boot environment that is both unbootable and marked as active on reboot.
You cannot create a snapshot of an unbootable boot environment.
You cannot use an unbootable boot environment or boot environment snapshot with the -e option of beadm create.
You cannot rename an unbootable boot environment. (C)
NEW QUESTION 75
Review the ZFS dataset output that is displayed on your system:
Which four correctly describe the output?
- A. /data/file1 has been deleted.
- B. /data/file1 has been modified and is now smaller.
- C. /data/file4 has been added.
- D. /data/file4 has been modified and is now larger.
- E. /data/file3 has been renamed to /data/file13.
- F. The link /data/file3 has been added.
- G. /data/file3 (a link) has been removed.
- H. /data/file5 has been modified.
Answer: A,C,E,H
Explanation:
A: + Indicates the file/directory was added in the later dataset
C: R Indicates the file/directory was renamed in the later dataset
E: - Indicates the file/directory was removed in the later dataset
G: M Indicates the file/directory was modified in the later dataset
Note: Identifying ZFS Snapshot Differences (zfs diff)
You can determine ZFS snapshot differences by using the zfs diff command.
The following table summarizes the file or directory changes that are identified by the zfs diff command.
File or Directory Change Identifier
*File or directory is modified or file or directory link changed M
*File or directory is present in the older snapshot but not in the newer snapshot -
*File or directory is present in the newer snapshot but not in the older snapshot +
*File or directory is renamed R
NEW QUESTION 76
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