Oracle 1Z0-100 Online Practice Questions and Exam Preparation

Oracle 1Z0-100 Online Questions & Answers

• Question 131:

  Examine these commands used to control UPSTART logging:

  [root@FAROUT init] # initctl log-priority info [root@FAROUT init] # initctl log-priority Info

  [root@FAROUT init]#

  Which three statements are true about the logging done through these commands?

  A. UPSTART logs State Changes to /vat/log/messages.
  B. UPSTART logs job goals to /var/log/massages.
  C. UPSTART logs only informational messages about warnings and errors to /var/log/messages.
  D. UPSTART logs only informational messages about warnings to /var/log/messages.
  E. UPSTART logs event emissions to /var/log/messages.
  A. UPSTART logs State Changes to /vat/log/messages.
  C. UPSTART logs only informational messages about warnings and errors to /var/log/messages.

• Question 132:

  Examine this sequence of commands and output:

  [root@FARAWAY ~] # cat /etc/oracle-release Oracle Linux Server release 6.1

  [root@FARAWAY ~]# rpm 璹a oraclelinux* Oraclelinux-release-noted-6Server-5.x86_64 Oraclelinux-release-6Server-1.0.2.x86_64

  [root@FARAWAY ~] # rpm 璹a rehat-release* [root@FARAWAY ~] #

  [root@FARAWAY ~] # rpm 璹f /etc/oracle-release Oraclelinux-release-6Server-1.0.2.x86_64

  [root@FARAWAY ~] rpm 璹f /etc/redhat-release Oraclelinux-release-6Server-1.0.2.x86_64

  Which two can be determined from this output?

  A. The system has Oracle Linux 6 installed and the Red Hat compatible kernel is running.
  B. The system has Oracle Linux 6 installed and the Oracle Unbreakable Enterprise kernel Is running.
  C. It is not possible to determine which kernel is running.
  D. This system has been booted at least once, with the Red Hat-compatible kernel and once with the Unbreakable Enterprise kernel.
  E. The oracle-release package contains both Oracle and Red Hat release metadata.
  A. The system has Oracle Linux 6 installed and the Red Hat compatible kernel is running.
  D. This system has been booted at least once, with the Red Hat-compatible kernel and once with the Unbreakable Enterprise kernel.

• Question 133:

  Which three statements are true about rpm package dependencies?

  A. The RPM command can detect only direct package dependencies.
  B. The RPM command can detect both direct and indirect package dependencies.
  C. The YUM command can detect and resolve direct and indirect package dependencies.
  D. The YUM command can detect and resolve indirect package dependencies only within the same repository.
  E. The YUM command can only detect and resolve direct package dependencies.
  F. A source RPM can have a dependency on a binary RPM.
  B. The RPM command can detect both direct and indirect package dependencies.
  D. The YUM command can detect and resolve indirect package dependencies only within the same repository.
  F. A source RPM can have a dependency on a binary RPM.

  ---

  D: yum deplist

  Produces a list of all dependencies and what packages provide those dependencies for the given packages.

• Question 134:

  Examine the files and directories shown:

  

  What is the reason for this configuration? (Choose the best answer.)

  A. The links in /etc to the directories in /etc/rc.d are provided to make Linux run level processing configuration resemble the SysV UNIX configuration
  B. The links in /etc to the directories in /etc/rc.d are provided to permit one set to have different owners or ppermissions than the other
  C. The links in /etc to the directories in /etc/rc.d are not required and must have been added by the administrator
  D. The links in /etc to the directories in /etc/rc.d are provided to allow /etc/rc.d/rc to work properly
  A. The links in /etc to the directories in /etc/rc.d are provided to make Linux run level processing configuration resemble the SysV UNIX configuration

• Question 135:

  Users complain that system performance is unacceptable when using a specific application service running on a multiprocessor service. You have established from the storage team that disk response times have not increased, so you can discount there being an I/O problem.

  You run vmstat to look at CPU activity and notice high average disk times on the multiprocessor system and an average run queue of zero.

  You require more detail about each CPU from which the vmstat figures are derived, to investigate if the load is distributed evenly across all CPUs.

  Which three commands provide more detailed information about CPU load distribution?

  A. iostat x
  B. top
  C. mpstat
  D. vmstat
  E. sar
  C. mpstat
  D. vmstat
  E. sar

  ---

  C: A useful command to get CPU related stats is mpstat. Here is an example output:

  # mpstat -P ALL 5 2 Linux 2.6.9-67.ELsmp (oraclerac1) 12/20/2008

  10:42:38 PM CPU %user %nice %system %iowait %irq %soft %idle intr/s

  10:42:43

  PM all 6.89 0.00 44.76 0.10 0.10 0.10 48.05 1121.60

  10:42:43

  PM 0 9.20 0.00 49.00 0.00 0.00 0.20 41.60 413.00

  10:42:43

  PM 1 4.60 0.00 40.60 0.00 0.20 0.20 54.60 708.40 etc.

  D: When called, the grand-daddy of all memory and process related displays, vmstat, continuously runs and posts its information. It takes two arguments:

  # vmstat

  is the interval in seconds between two runs. is the number of repetitions vmstat makes. Here is a sample when we want vmstat to run every five seconds and stop after the tenth run. Every line in the output comes after five

  seconds and shows the stats at that time.

  # vmstat 5 10

  procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 1087032 132500 15260 622488 89 19 9 3 0 0 4 10 82 5 0 0 1087032 132500 15284 622464 0 0 230 151 1095

  858 1 0 98 1 0 0 1087032 132484 15300 622448 0 0 317 79 1088 905 1 0 98 0 ... shows up to 10 times.

  The output shows a lot about the system resources.

  E: sar stands for System Activity Recorder, which records the metrics of the key components of the Linux system--CPU, Memory, Disks, Network, etc.--in a special place: the directory /var/log/sa. The simplest way to use sar is to use it without any arguments or options. Here is an example:

  # sar Linux 2.6.9-55.0.9.ELlargesmp (prolin3) 12/27/2008

  12:00:01 AM CPU %user %nice %system %iowait %idle

  12:10:01 AM all 14.99 0.00 1.27 2.85 80.89

  12:20:01 AM all 14.97 0.00 1.20 2.70 81.13

  12:30:01 AM all 15.80 0.00 1.39 3.00 79.81

  12:40:01 AM all 10.26 0.00 1.25 3.55 84.93

  Incorrect:

  Not A: iostat is for I/O

• Question 136:

  Bash is invoked as an interactive login shell.

  What is the order in which the bash configuration files are read, assuming that all the files exist in their correct location and are readable?

  A. /etc/profile, ~/ .profile
  B. /etc/profile, ~/ .bash_profile
  C. /etc/profile, ~/ .bash_profile, ~/ .bash_login, ~/ .profile
  D. /etc/profile, ~/ .bash_profile, ~/ .profile, ~/ .bash_login
  C. /etc/profile, ~/ .bash_profile, ~/ .bash_login, ~/ .profile

  ---

  When Bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/ .bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The --noprofile option may be used when the shell is started to inhibit this behavior.

  When a login shell exits, Bash reads and executes commands from the file ~/.bash_logout, if it exists.

• Question 137:

  Examine some rules from the /etc/rsyslog.conf file:

  *.info;mail.debug;authpriv.none;cron.none /var/log/messages uucp, news.notice /var/log/spooler

  Which statement is true about the listed rules?

  A. Only messages with a priority of info from all facilities are sent to /var/log/messages.
  B. Only messages with a priority of notice from the news facility are sent to /var/log/spooler.
  C. Messages with a priority of debug or higher from the mail facility are sent to /var/log/message
  D. Only messages with a priority of debug from the mail facility are sent to /var/log/messages.
  C. Messages with a priority of debug or higher from the mail facility are sent to /var/log/message

• Question 138:

  Which three compression programs can tar use to natively filter an archive?

  A. Zip
  B. Bzip2
  C. Gzip
  D. Xz
  E. Cpio
  A. Zip
  B. Bzip2
  E. Cpio

  ---

  Linux Archive Tools (tar, star, gzip, bzip2, zip, cpio) Reference: http://www.usinglinux.org/archivers/

• Question 139:

  Which statement correctly describes the requisite PAM control flag? (Choose the best answer.)

  A. requisite flagged modules are ignored if they fail
  B. requisite flagged modules must be successfully checked for authentication to succeed. If a requisite module checks fails, the user is notified immediately with a message reflecting the first failed required or requisite module
  C. requisite items only play a role when no other modules of that module type have succeeded or failed. In that case, the success or failure of a requisite flagged module determines the overall PAM authentication for that module type
  D. requisite flagged modules must be successfully checked for authentication to succeed. If a requisite module checks fails, the user is not notified until all other modules of the same module's type have been checked
  B. requisite flagged modules must be successfully checked for authentication to succeed. If a requisite module checks fails, the user is notified immediately with a message reflecting the first failed required or requisite module

  ---

  Four types of control flags are defined by the PAM standard:

  required — the module must be successfully checked in order to allow authentication. If a required module check fails, the user is not notified until all other modules of the same module type have been checked.

  requisite — the module must be successfully checked in order for the authentication to be successful. However, if a requisite module check fails, the user is notified immediately with a message reflecting the first

  failed required or requisite module.

  sufficient — the module checks are ignored if it fails. But, if a sufficient flagged module is successfully checked and no required flagged modules above it have failed, then no other modules of this module type are checked and the user is

  authenticated.

  optional — the module checks are ignored if it fails. If the module check is successful, it does not play a role in the overall success or failure for that module type. The only time a module flagged as optional is necessary for successful

  authentication is when no other modules of that type have succeeded or failed. In this case, an optional module determines the overall PAM authentication for that module type.

  Reference: http://www.unix-info.org/RH_Guid.80/rhl-rg-en-8.0/s1-pam-control-flags.html

• Question 140:

  Which two actions are the required steps to prevent: non-root ssh access to the system?

  A. Ensuring that /etc/pam.d/sshd includes: account sufficient pam_nologin.so
  B. Create the /etc/nologin/login.deny file containing a single line +all
  C. Creating the /etc/nologin.allow file containing a single line root
  D. Creating the /etc/nologin file
  E. Ensuring that /etc/pam.d/sshd includes: account required pam_nologin.so
  D. Creating the /etc/nologin file
  E. Ensuring that /etc/pam.d/sshd includes: account required pam_nologin.so

  ---

  D: If the file /etc/nologin exists, only root is allowed to log in; other users are turned away with an error message. Note:

  * In some cases, the security policy may dictate additional mechanisms, such as TCP wrappers, Pluggable Authentication Modules (PAM), or the implementation of Security-Enhanced Linux (SELinux).