Oracle Oracle Certifications 1Z0-100 Questions & Answers

• Question 71:

  Which two statements are true regarding the use of the ssh-agent and ssh-add commands?

  A. The ssh-agent is used to hold private keys.

  B. The ssh-add command may ask for a passphrase each time the same key is required by the same user in the same shell.

  C. The ssh-agent is used to hold only public keys.

  D. The ssh-add command asks for the passphrase only the first time a key is required by the same user in the same shell.

  E. The ssh-add command retries the most recently saved passphrase if multiple key files are used.

  Correct Answer: AD

  A (not C): If you want to omit passphrase and password entry when you are using Solaris Secure Shell, you can use the agent daemon. Use the ssh-agent command at the beginning of the session. Then, store your private keys with the agent by using the ssh-add command.

  D: Add your private key to the agent daemon.

  The ssh-add command adds your private key to the agent daemon so that subsequent Secure Shell

  activity does not prompt you for the passphrase.

  myLocalHost% ssh-add

  Enter passphrase for /home/johndoe/.ssh/id_rsa:

  Identity added: /home/johndoe/.ssh/id_rsa(/home/johndoe/.ssh/id_rsa) myLocalHost%

• Question 72:

  Which three statements are true configuration files and the behavior of module parameters specified in those files, in the /etc/modprobe.d directory?

  A. The files may contain options to be passed to a module only when it is a dependency of a module being inserted.

  B. The file may contain shell commands to be run instead of inserting a particular module in the kernel.

  C. The files may contain options to be passed to a module, only when it is inserted using a modprobe command.

  D. The files may contain alias names for modules.

  E. The file may contain instructions to ignore certain modules.

  F. The files may contain options to be passed to a module only when it is Inserted using an insmod command.

  Correct Answer: ACD

  modprobe.d - Configuration directory for modprobe Because the modprobe command can add or remove more than one module, due to modules having dependencies, we need a method of specifying what options are to be used with those modules (A). All files underneath the /etc/modprobe.d directory which end with the .conf extension specify those options as required. They can also be used to create convenient aliases (D): alternate names for a module, or they can override the normal modprobe behavior altogether for those with special requirements (such as inserting more than one module).

  C: options modulename option...

  This command allows you to add options to the module modulename (which might be an alias) every time

  it is inserted into the kernel: whether directly (using modprobemodulename or because the module being

  inserted depends on this module.

• Question 73:

  Examine this sequence of commands and output:

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

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

  [root@FARAWAY ~] # rpm –qa rehat-release* [root@FARAWAY ~] #

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

  [root@FARAWAY ~] rpm –qf /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.

  Correct Answer: AD

• Question 74:

  Examine the contents of /etc/rc.d

  

  Which two statements are true concerning the files contained in the run level-specific directories rc0.d through rc6.d?

  A. The files starting with S or K are links to scripts in the /ete/init.d directory.

  B. The files starting with S are always invoked by the /etc/rc.d/rc script even if the service managed by that script is already down.

  C. The files starting with S or K are added by using the chkcor.fig command.

  D. The files starting with K are always invoked by the /rc/rc,d/re script even if the service managed by that script is already up.

  E. The files starting with S are invoked before those starting with K.

  Correct Answer: DE

• Question 75:

  As root, you enter a crontab command as shown;

  [root@FAROUT cron.daily] # crontab -1 */2 * * * * vmstat 0 0 1 1-5 * iostat [root@FAROUT cron.daily] #

  Which three statements are true concerning the two cron jobs listed?

  A. The iostat command runs at midnight of every day except Sunday.

  B. The vmstat command runs twice per hour.

  C. The vmstat command runs every other hour.

  D. The vmstat command runs every second minute.

  E. All cron job output is sent to the root user's mall.

  F. All cron job output is sent to /var/log/messages.

  G. The iostat command runs at midnight on the first day of each of the first five months of the year.

  Correct Answer: ABF

• Question 76:

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

  A. Zip

  B. Bzip2

  C. Gzip

  D. Xz

  E. Cpio

  Correct Answer: ABE

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

• Question 77:

  Examine this /etc/fstab entry:

  

  Identify the actions you must perform to relocate this filesystem permanently to its new mount point?

  A. 1, 2, 3, 4, 5, 6 and 7

  B. 1, 2, 3, 4, 5 and 6

  C. 1, 2, 5 and 6

  D. 1, 2, 5, 6 and 7 ^

  E. 1, 2 and 6

  Correct Answer: D

• Question 78:

  During the setup of additional swap space on an ext2 filessystem, you encounter an error as shown below: Which action must you perform to add additional swap space?

  

  A. Create a symbolic link /dev/swapfile that points to u01/swapfile.

  B. Reinitialize /u01/swapfile by issuing mkswap L swapfile /u01/swapfile.

  C. Re-create the swapfile on an ext3 or ext4 filesystem.

  D. Change LABEL=swapfile to /u01/swapfile in the appropriate /etc/fstab entry.

  E. None, because adding filesystem based swap space is not supported.

  Correct Answer: C

• Question 79:

  Examine the command and output shown:

  bash-4.1# 1s 1s: error while loading shared libraries: libselinux.so.1: cannot open shared object file: No such file or directory

  No files have been deleted from your system and you want to determine the cause of the error.

  Which two commands or utilities can help the root user diagnose this problem?

  A. ldd

  B. dmesg

  C. grep libselinux.so.1 /var/log/dmesg

  D. strace

  E. grep libselinux.so.1 /var/log/message

  Correct Answer: AD

  Explanation:

  To diagnose the problem, use the following commands:

  ldd /usr/bin/ls and ldd /cat

  strace -o /tmp/ls.strace -f su - root -c ls Reference: http://www.experts-exchange.com/OS/Unix/Q_25150132.html

• Question 80:

  Which four are among the many components included in the oracle Linux distribution?

  A. Apache Web Server

  B. Documentation

  C. X Windowing system

  D. Oracle Database Server 11g

  E. Red Hat compatible kernel

  F. Oracle WebLogic Server 11g

  Correct Answer: ACDE