Oracle Oracle Certifications 1Z0-100 Questions & Answers

• Question 111:

  What is the purpose of setting ONPARENT = no in an Interface configuration file located in /etc/sysconfig/ network-scripts?

  A. To prevent a network interface from being brought up during system startup

  B. To prevent a slave network interface from being brought up during system startup

  C. To prevent an alias network interface from being brought up during system startup

  D. To prevent a master network interface from being brought up during system startup

  Correct Answer: C

  The ONBOOT directive tells the network initialization scripts not to start a given interface.

  If you need to stop a virtual interface from starting when the network interfaces are initialized, you need to set ONPARENT instead of ONBOOT to no.

  Reference: Keep IP Aliases from Starting at Boot

• Question 112:

  You must remove the user harhest from your Oracle Linux system because the person has left the company:

  User harhest has numerous files, directories, and a crontab.

  You issue:

  Userdel r harhest

  Which three outcomes result from the execution of this command?

  A. Files in the harhest home directory are removed.

  B. The home directory of harhest is removed.

  C. Files owned by narhest in any directory are removed.

  D. All directories owned by harhest are removed.

  E. The /var/spool/mail/harhest mailbox is removed.

  F. crontab /var/spool/cron/harhest is removed.

  Correct Answer: ABE

  The userdel command modifies the system account files, deleting all entries that refer to the user name LOGIN. The named user must exist.

  parameter r -r, --remove Files in the user's home directory will be removed along with the home directory itself and the user's mail spool. Files located in other file systems will have to be searched for and deleted manually.

• Question 113:

  

  Which four statements are about the use of these files and directories by UPSTART?

  A. /etc/rc.d/rc is executed each time the /sbin/init command us used, to change services appropriately for the target run level.

  B. /etc/rc.d/rc.local is executed at boot time, before the run level processing takes place.

  C. /etc/rc.d/rc is executed at boot time, to start the appropriate services for the run level defined in /etc/ initab.

  D. /etc/rc.d/rc.sysinit is executed once at boot time, regardless of which run level is set.

  E. /etc/rc.d/rc.sysint is executed each time the /sbin/init command is used to change the run level.

  F. /etc/rc.d/rc3.d contains links to scripts in /etc/init.d.

  G. /etc/rc.d/rc is executed after /etc/rc.d/rc.local.

  Correct Answer: DEFG

• Question 114:

  Examine these details from the sysctl.conf file and from the proc file system:

  [root@FAROUT fs]# grep aio-max-nr /etc/sysctl.conf # oracle-rdbms-server-11gR2-preinstall setting for fs.aio-mx-nr is 1048576 fs.aio-max-nr = 1048576

  [root@FAROUT fs] # cat /proc/sys/fs/aio-max-nr 1048576

  [root@FAROUT fs] # rpm –q libaio Libaio-0.0.107-10.e16.x86_64 Libaio-0.3.107-10.e76.i686

  Which statement is true about the setting created by oracle-rdbms-server-11gR2-preinstall?

  A. It allows a process to request an I/O without waiting for reply.

  B. It allows two or more processes to request I/O simultaneously while running on different CPUs.

  C. It allows a process to request a single I/O without awaiting for a reply. However, if a second I/O is requested, then the process must wait.

  D. It allows two or more processes to request I/Os and then to both be notified when both of them complete.

  Correct Answer: B

• Question 115:

  You use the chkconfig command to administer one of the services on your Oracle Linux system:

  [root@FAROUT ~]# chkconfig vncserver off [root@FAROUT ~] #

  No changes have been made to the init script for the service.

  Which two statements are true regarding the effects of Issuing this command?

  A. The vncserver service is shut down.

  B. The vncserver service configuration is disabled only for those run levels for which it is currently enabled.

  C. The vncserver service configuration is disabled for run levels 2, 3, 4 and 5.

  D. The vncserver service remains in the same state it was in before the command was issued.

  E. The vncserver service configuration is disabled for run levels 3 and 5 only.

  Correct Answer: AB

  Reference: http://www.oracle-base.com/articles/linux/configuring-vnc-server-on-linux.php

• Question 116:

  Examine the commands used by root to create the chrooted environments in the /jail directory:

  # mkdir /jail/bin/jail/lib64

  # cp /bin/bash/jail/bin linux-vdso.so.1 => (0x00007fff68dff000) libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00000033e00000) lid1.so.2 => /lib64/libc.so.6 (0x00000033e1600000) /lib64/id-linix-86-64.so.2 (0x00000033e0e00000)

  # cp /lib64/libtinfo.so.5/jail/lib64 # cp /lib64/libd1.so.6 /jail/lib64 # cp /lib64/libc.so.6 /jail/lib64 # cp /lib64/id-linux-x86-64.so.2 /jail/lib64

  The user root then issues this command:

  # chroot /jail

  What is the output from the cd, pwd, and 1s commands?

  A. bash-4.1# cd bash-4.1# pwd /root

  bash-4.1# 1s

  bash" 1s: command not found

  B. bash-4.1# cd bash: cd: /root: No such file or directory bash-4.1# pwd / bash-4.1 # 1s bash: 1s: command not found

  C. bash-4.1# cd bash: cd: command not found bash: pwd: command not found bash-4.1# 1s

  D. bash: 1s; # cd bash: cd: /root: unable to access chrooted file or directory /root bash-4.1# pwd / bash-4.1 # 1s bin lib64

  E. bash-4.1# cd bash: cd: /root: No such file or directory bash-4.1# pwd / bash-4.1# 1s bin lib64

  Correct Answer: A

• Question 117:

  Which two conditions should be met in order to successfully configure an openssh client on Oracle Linux?

  A. The openssh-server package must not be installed.

  B. The openssh package must be installed.

  C. The sshd daemon must not be started.

  D. The openssh-client package must be installed.

  E. The ssh-agent must be started.

  F. ssh keys must be generated by any user using the ssh client.

  Correct Answer: BD

  To connect to an OpenSSH server from a client machine, you must have the openssh-clients and openssh packages installed on the client machine.

• Question 118:

  Which three settings are required to configure an openLdap to use directory service provided by Ldap.example.com?

  A. Set the LDAP Search Base DN and the LDAP server address and post in /etc/openldap/ldap.conf to: dc=example, dc = com ldap://ldap.example.com:389

  B. Set LDAP Search Base DN and the LDAP server address and port in /etc/ldap.conf to:

  dc=example, dc=com

  ldap://ldap.example.com:389

  C. Ensure that /etc/nsswitch.conf correctly references authentication priorities: passed: files ldap shadow: files ldap group: files ldap

  D. Ensure that the LDAP server name can be resolved.

  E. Ensure that DNS is used to resolve the LDAP server name.

  Correct Answer: ACE

  A: The configuration file for the OpenLDAP libraries is /usr/local/etc/openldap/ldap.conf.

  C: In order to use LDAP naming services, you must also properly configure all LDAP client machines, in addition to modifying the nsswitch.conf

  E: The client's domain name must be served by the LDAP server

• Question 119:

  Refer to the Exhibit.

  [root@server1 ~ # 1s -1 /usr/bin/passwd

  -r-x—x—x 1 root root 21200 oct 7 21:01 /usr/bin/passwd

  [root@server1 ~] # 1s -1 /etc/shadow

  -r - - - - - - - - 1 root root 1818 Mar 7 10:31 /etc/shadow]

  [root@server1 ~]#

  A user smith is on your system complained that he is not able to change his password. As the

  administrator, you long-listed the passwd command and the /etc/shadow file.

  View the Exhibit that shows the output.

  What must you do to enable this user to change his password?

  A. Set SGID on /usr/bin/passwd.

  B. Set SUID on /usr/bin/passwd.

  C. Set sticky bit on /usr/bin/passwd.

  D. Set read and write permission for others on /etc/shadow.

  E. Set permission on /etc/shadow to 600.

  Correct Answer: D

• Question 120:

  What happens if you reboot a Ksplice Uptrack-enabled system when the following conditions exist?

  1.

  The Internet is unreachable due to a failing router.

  2.

  The INSTALL_ON_REBOOT property is set to YES in /etc/uptrack/uptrack.conf.

  A. The Ksplice updates are applied early in the boot sequence despite the fact that the Internet is unreachable.

  B. The Ksplice updates are not applied during the boot sequence, but they will be applied as soon as the Internet becomes reachable again.

  C. The updates are not applied during the boot sequence and will not be applied after the Internet has become reachable again.

  D. The system waits in the boot sequence for the internet to become reachable again.

  E. The system boots to single-user mode.

  Correct Answer: A

  *

  # Automatically install updates at boot time. If this is set, on # reboot into the same kernel, Uptrack will reinstall the same set of # updates that were present before the reboot. install_on_reboot = yes

  *

  To install updates automatically at boot time, the following entry must appear in /etc/uptrack/uptrack.conf:

  install_on_reboot = yes