Oracle 1Z0-821 Online Practice Questions and Exam Preparation

Oracle 1Z0-821 Online Questions & Answers

• Question 191:

  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 not bootable.
  B. The solaris-1 boot environment is incomplete.
  C. The solaris-1 boot environment was created automatically when the non global zone was created.
  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 associated with a non active global zone boot environment.
  A. The solaris-1 boot environment is not bootable.
  E. The solaris-1 boot environment is associated with a non active global zone boot environment.

  ---

  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.

  http://docs.oracle.com/cd/E23824_01/html/E21801/unbootable.html#scrolltoc

• Question 192:

  Which three statements are true concerning Image Packaging System (IPS) incorporation package?

  A. Installing an incorporation package does not install any other packages.
  B. Every feature or tool has a separate IPS incorporation.
  C. They constrain the versions of packages they incorporate.
  D. They are a content management tool and not a version management tool.
  E. Their dependencies are always of TYPE-REQUIRE.
  F. They are defined by their manifest
  A. Installing an incorporation package does not install any other packages.
  C. They constrain the versions of packages they incorporate.
  E. Their dependencies are always of TYPE-REQUIRE.

• Question 193:

  Which two statements are true concerning the creation of user accounts by using the useradd command?

  A. By default, it will create the user's home directory.
  B. New user accounts are unlocked but must change their password at their first login.
  C. New user accounts are in a pending activation state until a password is assigned to them.
  D. By default, a new group will be added for each new user account.
  E. By default, the UID of a new user account will be the next available number above the highest number currently assigned.
  F. By default, the UID of a new user account with be the lowest available unused number for nonsystem accounts.
  C. New user accounts are in a pending activation state until a password is assigned to them.
  E. By default, the UID of a new user account will be the next available number above the highest number currently assigned.

• Question 194:

  You are setting up an automated installer (AI) install server and issue the following command:

  installadm create-service -n prod_ai -s /repo/prod_ai.iso \

  -i 192.168.1.100 -c 5 -d /export/repo

  Which four options describe the install server that you have configured?

  A. The service name is prod_ai.
  B. DHCP base IP address is 192.168.1.100
  C. The initial IP address for the install clients will be 192.168.1.100. This IP address is temporary. After the client is booted, it will use IP addresses in the following range: 192.168.1.101-105.
  D. Five IP addresses are allocated for DHCP clients, starting with 192.168.1.100.
  E. The Install server will support up to five clients.
  F. The AI net image ISO file is located in /repo/prod and the net image ISO will be unpacked in /export/repo.
  G. The AI net image ISO file is located in /repo/repo and is named /repo/prod/_ai.iso.
  A. The service name is prod_ai.
  B. DHCP base IP address is 192.168.1.100
  D. Five IP addresses are allocated for DHCP clients, starting with 192.168.1.100.
  F. The AI net image ISO file is located in /repo/prod and the net image ISO will be unpacked in /export/repo.

  ---

  A: -n

  Uses this install service name instead of default service name.

  B: -i

  Sets up a new DHCP server. The IP addresses, starting from dhcp_address_start, are set up.

  D: -c

  Sets up a total number of IP addresses in the DHCP table equal to the value of the count_of_ipaddr. The first IP address is the value of dhcp_ip_start that is provided by the -i option.

  F: -s

  Specifies location of AI ISO image to use for setting up the install service.

  Required: Specifies location to set up net image.

• Question 195:

  User jack logs in to host solar in and issues the following command: jack@solaris:-$ ls .ssh

  id_dsa id_dsa.pub id_rsa id_rsa.pub known_hosts authorized_keys

  Which two are true?

  A. The id_rsa file contains the private key for rhosts-based host authentication.
  B. The id_dsa.pub file contains the Digital Signature Algorithm public key for the user jack.
  C. The id_rsa.pub file contains the Rivest Shamir Adelman public key for the host solaris.
  D. The authorized_keys file contains the private keys of remote users authorized to access jack's account on solaris.
  E. The known_hosts file contains the verified public keys of remote hosts known to be trusted.
  A. The id_rsa file contains the private key for rhosts-based host authentication.
  E. The known_hosts file contains the verified public keys of remote hosts known to be trusted.

  ---

  A: You will see two files starting with id_rsa. id_rsa is the private key and id_rsa.pub is public key.

  E: The .ssh/known_hosts file

  In order to use public-key secure connection with other hosts (ssh, scp, sftp) there is a special directory, ~/.ssh/, where passphrases and public keys are stored. Normally you wouldn't need to know the gory details, but from time to time a host

  will change its public key and then you have difficulty using ssh or scp with that host, and have to edit a file named known_hosts.

  If you try to ssh to another computer, but get an error message that warns about a changed or incorrect public key, then it is probably just a case of that host changing its public key. (It is possible, though usually not the case, that malicious

  hacking is involved.) Unless you actually suspect hacker involvement, you can edit the file ~/.ssh/known_hosts using your usual text editor (vi, emacs, nedit, or pico) and delete any line with the name of that host.

  Then when you try to ssh that host again, it will be like the first time ever; ssh will ask you if you want to accept a new public key, you type the whole word yes, and everything will proceed normally from there.

  Here is what a typical ~/.ssh/known_hosts file might contain. Note that newton is represented on two different lines:

  newton 1024 35

  153438062610297067329638677441205712613292203533062535600064224677647442 245028855505387934431717435134842994423656065076260604296084868001730665

  553662299156116414854701274715680961503198280525759778667306417179500370 189017139564144825610347509023078143132936185076849630461827976942220442 313116255293297021841

  ucsub 1024 37

  132170811640421742212085598383135714069016332111955003414250071326834884 018721183646445780180633494496866895830879394309011412231102757022090299

  732775466435482517698989962531081214859205054227533597152962802400251809 883548442498002326460312850336779152617243800769119880843882425555806081 435017335194477605333

  simpson 1024 41

  840896920592494584403453622735282634536002054701576247765078766974814128 393752943151071629834843909016027026612791643752972116459602750267266908

  365259665072736159491719667576217171370458928680504368847255632477925660 234893185547218857655484574619075125368470792976275806263534208879722192 77539015703446529603

  newton, 128.138.249.8 ssh-rsa

  AAAAB3NzaC1yc2EAAAABIwAAAIEA0d7Aoure0toNJ+YMYi61QP2ka8m5x5ZQlT7obP8C K3eropfqsMPPY6uiyIh9vpiFX2r1LHcbx139+vG6HOtVvuS8+IfMDtawm3WQvRuOopz3vVy

  5GtMwtaOgehsXoT930Ryev1bH5myPtWKlipITsOd2sX9k3tvjrmme4KCGGss=

• Question 196:

  You have installed an update to the gzip package and need to "undo" .ho update and return the package to its "as-delivered" condition. Which command would you use?

  A. pkg undo
  B. pkg revert
  C. pkg fix
  D. pkg uninstall
  B. pkg revert

  ---

  Use the pkg revert command to restore files to their as-delivered condition.

• Question 197:

  Which network protocol provides connectionless, packet-oriented communication between applications?

  A. TCP
  B. UDP
  C. IP
  D. ICMP
  E. NFS
  F. IPSec
  B. UDP

  ---

  The User Datagram Protocol (UDP) is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to

  other hosts on an Internet Protocol (IP) network without requiring prior communications to set up special transmission channels or data paths.

  Compared to TCP, UDP is a simpler message-based connectionless protocol.

• Question 198:

  Identify three differences between the shutdown and init commands.

  A. Only shutdown broadcasts a final shutdown warning to all logged-in users.
  B. init does not terminate all services normally. The shutdown command performs a cleaner shutdown of all services.
  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 sends a shutdown message to any systems that are mounting resources from the system that is being shut down.
  E. The shutdown command will shut the system down and turn off power; init will only shut the system down.
  A. Only shutdown broadcasts a final shutdown warning to all logged-in users.
  B. init does not terminate all services normally. The shutdown command performs a cleaner shutdown of all services.
  E. The shutdown command will shut the system down and turn off power; init will only shut the system down.

• Question 199:

  You have a user that needs to use the cron tool to schedule some repetitive tasks. When the user enters the crontab 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
  A. /etc/cron.d

  ---

  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.

• Question 200:

  You wish to troubleshoot some issues that you are having on the system. You want to monitor the /var/adm/messages file in real time. Which command would you use to do this?

  A. head
  B. tail
  C. cat
  D. file
  E. test
  B. tail

  ---

  tail is a program on Unix and Unix-like systems used to display the last few lines of a text file or piped data.

  By default, tail will print the last 10 lines of its input to the standard output. With command line options the number of lines printed and the printing units (lines, blocks or bytes) may be changed. The following example shows the last 20 lines of filename: tail -n 20 filename