Oracle 1Z0-821 Online Practice Questions and Exam Preparation

Oracle 1Z0-821 Online Questions & Answers

• Question 71:

  User jack logs in to host solaris and then attempts to log in to host oracle using ssh. He receives the following error message:

  The authenticity of host oracle (192.168.1.22) can't be established. RSA key fingerprint is

  3B:23:a5:6d:ad:a5:76:83:9c:c3:c4:55:a5:18:98:a6

  Are you sure you want to continue connecting (yes/no)?

  Which two are true?

  A. The public host key supplied by solaria is not known to the host oracle.
  B. The error would not occur if the RSA key fingerprint shown in the error message was added to the /etc/ssh/known_hosts file on solaris.
  C. The private host key supplied by oracle is not known to solaris.
  D. If jack answers yes, the RSA public key for the host oracle will be added to the known_hosts file for the user jack.
  E. The public host key supplied by oracle is not known to the host solaris.
  B. The error would not occur if the RSA key fingerprint shown in the error message was added to the /etc/ssh/known_hosts file on solaris.
  D. If jack answers yes, the RSA public key for the host oracle will be added to the known_hosts file for the user jack.

  ---

  The fingerprints are used to guard against man in the middle attacks. Since ssh logins usually work over the internet (an insecure connection), someone could hijack your connection. When you try to log into yourmachine.com, he could get "in

  the middle" and return your challenge as if he was yourmachine.com. That way, he could get hold of your login password.

  To make this attack harder, ssh stores the fingerprint of the server's public key on the first connection attempt. You will see a prompt like:

  The authenticity of host 'eisen (137.43.366.64)' can't be established. RSA key fingerprint is cf:55:30:31:7f:f0:c4:a0:9a:02:1d:1c:41:cf:63:cf. Are you sure you want to continue connecting (yes/no)

  When you enter yes, ssh will add the fingerprint to your known_hosts file. you will see Code:

  Warning: Permanently added 'eisen, 137.43.366.64' (RSA) to the list of known hosts.

  The next time you login, ssh will check whether the host key has changed. A changing host key usually indicates a man in the middle attack, and ssh refuses to connect.

• Question 72:

  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. Passwords for account jack must be a minimum of 15 characters long.
  B. The password for account jack has expired.
  C. The password for account jack has 5 characters.
  D. A history of 3 prior passwords for the account jack is kept to inhibit password reuse.
  E. The minimum lifetime for a password for account jack is 15 days.
  B. The password for account jack has expired.
  E. The minimum lifetime for a password for account jack is 15 days.

  ---

  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

• Question 73:

  You are the administrator for a group of shell script developers. They use vi, and have asked you to make their scripts automatically executable when they save their files. How can this be accomplished?

  A. Enter set -o vi on the command line, or include it in each user's startup script.
  B. Enter umask -s on the command line, or include it in each user's startup script.
  C. Enter umask 000 on the command line, or include it in each user's startup script.
  D. Enter umask 777 on the command line, or include it in each user's startup script.
  E. It is not possible to automatically set the execute bit on with the umask setting, or vi option.
  F. Enter umask 766 the command line, or include it in the global startup script for the default shell.
  E. It is not possible to automatically set the execute bit on with the umask setting, or vi option.

  ---

  Unlike DOS, which uses the file extension to determine if a file is executable or not, UNIX relies on file permissions.

  The value assigned by umask is subtracted from the default. User's file creation mask. umask sets an environment variable which automatically sets file permissions on newly created files. i.e. it will set the shell process's file creation mask to

  mode.

  umask 000 would grant full permissions.

  Note: 777 full permissions

• Question 74:

  Which network protocol is responsible for routing packets from one network to another?

  A. TCP
  B. UDP
  C. IP
  D. ICMP
  E. Ethernet
  C. IP

  ---

  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.

• Question 75:

  When issuing the zonestat 2 1h is command, the following information is displayed:

  

  Which two options accurately describe the statistics contained in the output?

  A. dbzone is using 0.21% of the total CPU resource available in the zone's processor set.
  B. dbzone is using 0.21% of the global zone's total CPU.
  C. dbzone is using 5.48% of the total physical memory that has been allocated to the zone.
  D. dbzone is using 2.37% of the global zone's total virtual memory.
  E. The network is being utilized 100% with no physical bandwidth remaining.
  A. dbzone is using 0.21% of the total CPU resource available in the zone's processor set.
  C. dbzone is using 5.48% of the total physical memory that has been allocated to the zone.

  ---

  A: %PART The amount of cpu used as a percentage of the total cpu in a processor-set to which the zone is bound. A zone can only have processes bound to multiple processor sets if it is the global zone, or if psrset(1m) psets are used. If multiple binding are found for a zone, it's %PART is the fraction used of all bound psets. For [total] and [system], %PART is the percent used of all cpus on the system.

  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.

• Question 76:

  In Oracle Solaris 11, where is the Oracle default repository located?

  A. /var/spool/pkg
  B. http://localhost/solaris
  C. http://pkg.oracle.com/solaris/release
  D. http://www.oracle.com/Solaris/download
  E. /cdrom/cdrom0
  C. http://pkg.oracle.com/solaris/release

  ---

  REPOSITORY DESCRIPTION

  *

  http://pkg.oracle.com/solaris/release The default repository for new Oracle Solaris 11 users. This repository receives updates for each new release of Oracle Solaris. Significant bug fixes, security updates, and new software may be provided at any time for users to install at Oracle's discretion.

  *https://pkg.oracle.com/solaris/support

  Provides bug fixes and updates. Accessible with a current support contract from Oracle.

  *

  https://pkg.oracle.com/solaris/dev Provides the latest development updates. Accessible to users enrolled in the Oracle Solaris 11 Platinum Customer Program and approved Oracle Partners.

• Question 77:

  You need to set up a local package repository to serve 75 client systems. Multiple clients will being the package repository concurrently and you need to ensure that the local repository performs very well under this heavy load, especially during package intensive operations.

  Which option would ensure the best performance of the repository during package- intensive rations by multiple clients?

  A. Set up multipathing on the package repository server to distribute the network load multiple network interfaces.
  B. Deploy a second instance of the package repository server to run as a read writable mirror.
  C. Deploy a second instance of the package repository server to run as a read-only mirror.
  D. Deploy a second instance of the package repository server to run as a clone of the primary repository server.
  E. Deploy a package repository locally on each client.
  A. Set up multipathing on the package repository server to distribute the network load multiple network interfaces.

• Question 78:

  User1 is attempting to run the following command:

  cp bigfile verybig

  The system displays the following errer:

  cp: cannot create verybig: Disc quota exceeded

  Your initial troubleshooting shows that the df -h command indicates the account is at 100% capacity. What command would you use to determine how much disk space the user has available?

  A. zfs get quota rpool/export/home/user1
  B. zfs userused@user1
  C. zfs quota=1M /rpool/export/home/user1
  D. df -h | grep user1
  A. zfs get quota rpool/export/home/user1

  ---

  ZFS quotas can be set and displayed by using the zfs set and zfs get commands. In the following example, a quota of 10 Gbytes is set on tank/home/bonwick.

  # zfs set quota=10G tank/home/bonwick # zfs get quota tank/home/bonwick NAME PROPERTY VALUE SOURCE tank/home/bonwick quota 10.0G local

• Question 79:

  You have edited /etc/profile to include the lines:

  dennis_says=hello

  export dennie_says

  You have also edited /etc/skel/local.profile to include the line:

  dennis_says=world

  You now create a new user account brian, and specify use of the bash shell. When brian logs in and enters

  Echo $dennis_says

  What will he see, and why?

  A. world, because the local.profile entry will be executed last
  B. hello, because the global /etc/profile entry overrides the local.profile entry
  C. hello, because the local.profile entry is not automatically sourced on login
  D. hello, because the value specified in local.profile was not exported
  E. nothing, because the variable was not exported in local.profile
  A. world, because the local.profile entry will be executed last

  ---

  The $HOME/.profile file is an initialization file that is executed after the /etc/profile when logging in to the Bourne or Korn shell. The file contains user preferences for variable settings. If the ENV variable is set to .kshrc, the .kshrc file executes every time a new shell begins execution. The $HOME/.profile is copied from the /etc/skel/local.profile file by the Administration Tool when creating a new account.

  Note: /etc/skel/local.profile Per-system configuration file for sh/ksh/ksh93/bash login sessions, installed for new users

• Question 80:

  Before booting testzone, a non-global zone, you want to connect to the zone's console so that you can watch the boot process.

  Choose the command used xo connect to testzone's console.

  A. zoneadm ?C testzone
  B. zoneadm ?console testzone
  C. zlogin ?z testzone console
  D. zlogin ?z testzone ?C
  E. zlogin ?C testzone
  F. zoneadm ?z testzone ?C
  E. zlogin ?C testzone