Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 11:

  You have a process called bigscript, and you need to know the PID number for this process.

  Which command will provide that information?

  A. pkill bigscript

  B. ps bigscript

  C. pgrep bigscript

  D. prstat bigscript

  Correct Answer: C

  Pgrep takes a process name and return a PID.

  Note: pgrep looks through the currently running processes and lists the process IDs which matches the

  selection criteria to stdout. All the criteria have to match. For example, pgrep - u root sshd will only list the

  processes called sshd AND owned by root.

  Incorrec answers:

  ps bigscript: You can't pass a name to ps, it interprets it as arguments.

• Question 12:

  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. NWAM will be used to configure the network interface.

  B. The network/physical service is offline.

  C. You cannot log in from the console as root. You must first log in as a user and then su to root account.

  D. The root user can log in from the console login.

  E. You will be prompted to configure the network interface after the initial login.

  Correct Answer: BD

• Question 13:

  Before booting test zone 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 to 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 - testzone - c

  Correct Answer: E

  The following options are supported:

  Connects to the zone console. Connects to the zone console.

  Note: After you install a zone, you must log in to the zone to complete its application environment. You might log in to the zone to perform administrative tasks as well. Unless the -C option is used to connect to the zone console, logging in to a zone using zlogin starts a new task. A task cannot span two zones

• Question 14:

  Review the storage pool information:

  

  Which statement describes the status of this storage pool?

  A. It is a RAIDZ storage pool and can withstand a single disk failure; data will be striped at: disk components.

  B. It is a double-parity RAIDZ storage pool and can withstand two disk failures; data will be striped across four disk components.

  C. It is an improperly configured RAIDZ storage pool; data will be striped across four disk components, but only three drives are protected with redundancy.

  D. It is an improperly configured RAIDZ storage pool; data will be striped across three disk components, but only three drives are protected with redundancy.

  Correct Answer: D

  Device c3t6d0 is not included in the RAIDZ storage pool. The other three devices are included in the raidz pool. The data on these devices are protected.

  Note: In addition to a mirrored storage pool configuration, ZFS provides a RAID-Z configuration with either single, double, or triple parity fault tolerance. Single-parity RAID-Z (raidz or raidz1) is similar to RAID-5. Double-parity RAID-Z (raidz2) is similar to RAID-6.

• Question 15:

  You want to display the IP address assignments of the network interfaces. Which command should you use?

  A. ipadm show-if

  B. ipadm show-addr

  C. ipadm show-prop

  D. ipadm show-addrprop

  Correct Answer: B

  'ipadm show-addr' displays all the configured addresses on the system.

  Example: # ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 lo0/v6 static ok ::1/128

• Question 16:

  You are attempting to troubleshoot an event that should have made an entry into the messages log. This event happened about two weeks ago. Which file should you look at first?

  A. /var/adm/messages

  B. /var/adm/messages.0

  C. /var /adm/messagas.1

  D. /var/adm/messages.2

  E. /var/adm/messages.3

  Correct Answer: A

  The /var/adm/messages is the file to which all the messages printed on the console are logged to by the

  Operating System. This helps to track back check the console messages to troubleshoot any issues on the

  system.

  Syslog daemon also writes to this /var/adm/messages file.

  The /var/adm/messages file monitored and managed by newsyslog and its configuration file is /usr/lib/

  newsyslog.

  This script runs as the roots cron job everyday, checks the /var/adm/messages file and copies/moves it to /

  var/adm/messages.0, 1, 2, 3, 4, 5, 6, 7. In other words, it does the Log Rotation for the /var/adm/

  messages.

  In an event the /var file system is running out of space, these files needs to checked and can be removed

  (not the actual /var/adm/messages itself) to free up space on the file system.

  However, care has to be taken, if you decide to empty the /var/adm/messages itself for any reason. This

  process is called Truncation.

  SOLARIS SYSTEM ADMIN TIPS, /var/adm/messages

• Question 17:

  You are having an issue with the shutdown command. You wish to determine if the file is a script or an executable program. Which command would you use to determine this?

  A. od shutdown

  B. file shutdown

  C. test shutdown

  D. cksum shutdown

  E. attrib shutdown

  Correct Answer: B

  The file command determines the file type file tests each argument in an attempt to classify it. There are three sets of tests, performed in this order: filesystem tests, magic tests, and language tests. The first test that succeeds causes the file type to be printed.

• Question 18:

  On localSYS, your SPARC based server, you back up the root file system with recursive snapshots of the root pool. The snapshots are stored on a remote NTS file system.

  This information describes the remote system where the snapshots are stored:

  Remote system name: backupSYS

  File system whore the snapshots are stored: /backups/localSYS

  Mounted file system on localSYS: /rpool/snaps

  Most recent backup name: rpool-1202

  Disk c0t0d0 has failed in your root pool and has been replaced. The disk has already been part< and labeled and now you need to restore the root file system. Which procedure would you follow to restore the ZFS root file system on localSYS?

  A. boot cdrom -smount -f nfs backup_server:/rpool/snaps /rmtzpool create rpool c0t0d0s0cat /mnt/ rpool.1202 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

  B. boot cdrom -smount -f nfs backup_server:/rpool/snaps /mntzpool create rpool c0t0d0s0zfs create -o mountpoint=/ rpool/ROOTcat /mnt/rpool.1011 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/ solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

  C. boot cdrom -smount -F nfs backup_server:/rpool/snaps /mntcat /mnt/rpool.1011 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpool c0t0d0s0Reinstall the bootblock on c0t0d0s0

  D. boot cdrom -smount -f nfs backup_server:/rpool/snaps /rmtzpool create rpool c0t0d0s0zfs receive -Fdu /mnt/rpool.1011zpool set bootfs=rpool/ROOT/solaris rpoolReinstall the bootblock on c0t0d0.

  Correct Answer: A

  How to Recreate a ZFS Root Pool and Restore Root Pool Snapshots In this scenario, assume the following conditions:

  *

  ZFS root pool cannot be recovered

  *

  ZFS root pool snapshots are stored on a remote system and are shared over NFS

  *

  The system is booted from an equivalent Solaris release to the root pool version so that the Solaris release and the pool version match. Otherwise, you will need to add the -o version=version-number property option and value when you recreate the root pool in step 4 below.

  All steps below are performed on the local system.

  1.

  Boot from CD/DVD or the network.

  On a SPARC based system, select one of the following boot methods:

  ok boot net -s ok boot cdrom -s If you don't use -s option, you'll need to exit the installation program.

  2.

  Mount the remote snapshot dataset.

  For example:

  # mount -F nfs remote-system:/rpool/snaps /mnt

  3.

  Recreate the root pool.

  For example:

  # zpool create -f -o failmode=continue -R /a -m legacy -o cachefile=/etc/zfs/zpool.cache rpool c1t0d0s0

  4.

  Restore the root pool snapshots.

  This step might take some time. For example:

  # cat /mnt/rpool.0311 | zfs receive -Fdu rpool Using the -u option means that the restored archive is not mounted when the zfs receive operation completes.

  5.

  Set the bootfs property on the root pool BE.

  For example:

  # zpool set bootfs=rpool/ROOT/osolBE rpool

  6.

  Install the boot blocks on the new disk.

  On a SPARC based system:

  # installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c1t0d0s0

• Question 19:

  A user jack, using a korn shell, requests a directory listing as follows:

  jack@solaris:/export/home/jack $ 1s

  File filea Filea fileb Fileb filec Filec

  Which two statements are correct?

  A. The pattern [?i]*a will expand to filea Filea.

  B. The pattern [fF]*a? will expand to [fF] *a?.

  C. The pattern [gfe] * will expand to file filea fileb filec.

  D. The pattern [g-e] * will expand to file filea fileb filec.

  E. The pattern [fF] [a-zA-z] i*e will expand to file.

  Correct Answer: AC

  A: starting with one single character, second character must be letter i, any characters, ending with letter a.

  C: starting with letter e, f, or g, followed by anything.

• Question 20:

  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

  Correct Answer: B

  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