Oracle Oracle Certifications 1Z0-100 Questions & Answers

• Question 101:

  Examine the commands and output when trying to start OSWatcher Black Box.

  

  Identify two recommended solutions to this problem.

  A. Edit the startOSWbb.sh script to specify your proffered shell, ensuring that it is started in POSIX compliance mode.

  B. Install ksh on the system, if not currently installed.

  C. Create a Symbolic link /usr/bin/ksh that points to /bin/bash.

  D. Ensure that ksh is accessible with the path /usr/bin/ksh. Create a symbolic link if necessary.

  E. Create a shell alias called /usr/bin/ksh that expands to /bin/bash.

  Correct Answer: AC

• Question 102:

  Identify two true statements about the nice command.

  A. It may the used to raise the priority of existing processes.

  B. It may be used to set the initial priority of a process.

  C. A higher nice value makes a process run at a lower priority.

  D. By default, a normal user can make a process run at a higher priority.

  E. It may be used to lower the priority of existing processes.

  Correct Answer: CE

  nice - run a program with modified scheduling priority. Synopsis

  nice [OPTION] [COMMAND [ARG]...] Description

  Run COMMAND with an adjusted niceness, which affects process scheduling. With no COMMAND, print the current niceness. Nicenesses range from -20 (most favorable scheduling) to 19 (least favorable).

• Question 103:

  Examine the output of a bonded interface configuration from which one network cable has been unplugged:

  # cat /proc.net/bonding/bond0 Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: eth2 MII Status: up MII poling interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth1 MII status: down Link Failure Count: 1 Permanent HW addr: 00:0c:29:7b:3c:71 Slave Queue ID: 0 Slave Interface: eth2 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:0c:29:7b:3s:7b

  Which statement is true when you plug in the eth1 network cable?

  A. The status of the slave interface eth1 changes to up and is promoted to the active slave and eth2 becomes the backup slave.

  B. The status of the slave interface eth1 changes to up and becomes a second active slave.

  C. The status of the slave interface eth1 changes to up but must be manually assigned the active or backup slave role.

  D. The status of the slave interface eth1 changes to up and becomes the backup slave.

  Correct Answer: A

• Question 104:

  Which four statements are true concerning the various stages of GRUB bootloader in Oracle Linux?

  A. GRUB stage1 must always load stage1_5.

  B. GRUB stage1_5 is used to process the /boot/grub/grub.conf file.

  C. GRUB stage1_5 loads GRUB stage2.

  D. GRUB stage1 may load GRUB stage2 directly.

  E. GRUB stage1 provides support for several different filesystems, enabling stage1 to load stage1_5.

  F. GRUB stage1_5 provides support for several different filesystems, enabling stage1_5 to load stage2.

  G. GRUB stage2 is used to process the /boot/grub/grub.conf file.

  Correct Answer: CDEG

  CD: Stage 1 code is stored in the MBR. This code contains a block list that points to the next stage of

  GRUB, which is either stage1_5 or stage 2, depending on the file system type. E(not F): Stage1_5 code

  allows GRUB to interpret different types of file system G (not B): Stage 2 code reads /boot/grub/grub.conf

  to determine how to load the kernel.

  Incorrect:

  Not A:. For some file system types such as ext4, GRUB does not need to load stage1_5.

• Question 105:

  Examine the extract of the /etc/nologin file and the /etc/pam.d/login file on server1:

  [root@server1 ~] # cat /etc/nologin bob smith [root@server1 ~] # cat /etc/pam.d/login

  account required pam_nologin.so account include system-auth

  Which statement is true about users?

  A. Only the root user can log in to the system.

  B. Only users root bob and smith would be unable to log in to the system.

  C. All users, including the root user, would be permitted to log in to the system.

  D. All users, including the root user, would be unable to log in to the system.

  Correct Answer: A

  auth required pam_nologin.so -- This is the final authentication step. It checks whether the /etc/nologin file exists. If it exists and the user is not root, authentication fails.

  *

  The /etc/nologin file contains the message displayed to users attempting to log on to a machine in the process of being shutdown.

  *

  the login program defines its service name as login and installs the /etc/pam.d/login PAM configuration file.

• Question 106:

  Which two statements correctly describe the type of Information and the behavior of files in the proc filesystem on Oracle Linux 6?

  A. It is not possible to write to any file in the proc filesystem.

  B. The /proc/cmdline file contains the parameters passed to the kernel.

  C. Each process has a directory named for the process number in the proc filesystem.

  D. The proc filesystem contains the same hardware information that is contained in the sys filesystem for backward compatibility.

  E. Each process thread has a directory named for the process thread number in the proc files/stem.

  Correct Answer: AB

  B: proc/cmdline This file shows the parameters passed to the kernel at the time it is started. A sample /proc/cmdline file looks like the following: ro root=/dev/VolGroup00/LogVol00 rhgb quiet 3

  Note:

  /proc is very special in that it is also a virtual filesystem. It's sometimes referred to as a process information

  pseudo-file system. It doesn't contain 'real' files but runtime system information (e.g. system memory,

  devices mounted, hardware configuration, etc). For this reason it can be regarded as a control and

  information centre for the kernel. In fact, quite a lot of system utilities are simply calls to files in this

  directory.

• Question 107:

  Which two statements are true concerning a GUID Partition Table (GPT)?

  A. It supports named disk partitions.

  B. It supports primary and extended partitions.

  C. It supports disks greater than two terabytes.

  D. It cannot be used on the system disk.

  E. It supports only up to 16 partitions.

  Correct Answer: AC

  not B, not E: On GUID Partition Table (GPT) hard disks, you can configure up to 128 partitions and there is

  no concept of extended or logical partitions.

  Not D: You cannot boot from a GPT disk.

• Question 108:

  Match the rpm options with their functions:

  1.

  –I a. replaces any older versions of package with the new package

  2.

  –U b. upgrades packages, but only if an earlier version exists on your system

  3.

  –F c. Uninstall the specified package

  4.

  –e d. installs a new package

  A. 1-d, 2-a, 3-b, 4-c

  B. 1-d, 2-b, 3-a, 4-c

  C. 1-a, 2-c, 3-b, 4-d

  D. 1-a, 2-b, 3-c, 4-d

  Correct Answer: B

  *

  (1d) rpm {-i | --install} [install-options] PACKAGE_FILE...

  This installs a new package.

  *

  (4c) The general form of an rpm erase command is

  rpm {-e | --erase} [--allmatches] [--nodeps] [--noscripts] [--notriggers] [--test] PACKAGE_NAME...

  *(2b) rpm {-U | --upgrade} [install-options] PACKAGE_FILE...

  This upgrades or installs the package currently installed to a newer version. This is the same as install, except all other version(s) of the package are removed after the new package is installed.

  *(3a) rpm {-F | --freshen} [install-options] PACKAGE_FILE...

  This will upgrade packages, but only if an earlier version currently exists.

• Question 109:

  Examine the line from /etc/rsyslog.conf: Mail.* -/var/log/maillog

  Which statement correctly describes this rule?

  A. The rule name prefix of "-" is tolerated for syslog and syslog.sys compatibility with no impact or rsyslog behavior regardless of the global directive settings.

  B. The file name prefix of "-" is a way of disabling mail log messages under certain conditions to /var/log/ maillog.

  C. The filename prefix of "-" is a performance enhancement. It stops file syncing on every message. The log certain will be the same whether a minus prefix is used or not.

  D. The file name prefix of "-" forces file syncing after every message is logged to ensure each message is written to disk force before attempting to write a subsequent message to the same file.

  Correct Answer: D

  *

  # Log all the mail messages in one place.

  mail.* -/var/log/maillog

  *

  Example:

  To select all kernel syslog messages with any priority, add the following text into the configuration file:

  kern.*

  *

  Example 2:

  the following rule is comprised of a selector that selects all cron syslog messages and an action that saves

  them into the /var/log/cron.log log file:

  cron.* /var/log/cron.log

  Note:

  *

  For those files that are controlled by the system logging daemon rsyslogd, the main configuration file is / etc/rsyslog.conf, which contains global directives, module directives, and rules.

  *

  The main configuration file for rsyslog is /etc/rsyslog.conf. Here, you can specify global directives, modules, and rules that consist of filter and action parts.

  *

  The most used and well-known way to filter syslog messages is to use the facility/priority- based filters

  which filter syslog messages based on two conditions: facility and priority separated by a comma. To

  create a selector, use the following syntax:

  FACILITY.PRIORITY

  where:

  FACILITY specifies the subsystem that produces a specific syslog message.

  PRIORITY specifies a priority of a syslog message.

  You may also use an asterisk (*) to define all facilities or priorities (depending on where you place the

  asterisk, before or after the comma).

• Question 110:

  Examine the partition table:

  Disk /dev/sdd: 107 MB Sector size (logical/physical): 512B/512B Partition Table: msdos

  Number Start End Size Type File System Flags 1 1049KB 79.7MB 78.6MB Primary

  Which program cannot be used to add another partition on this device?

  A. fdisk

  B. cfdisk

  C. parted

  D. kpartx

  Correct Answer: D

  kpartx - Create device maps from partition tables

  Incorrect: Not A: fdisk (in the first form of invocation) is a menu driven program for creation and manipulation of partition tables. Not B: cfdisk is a disk partition manipulation program, which allows you to create, destroy, resize, move and copy partitions on a hard drive not C: parted GNU Parted - a partition manipulation program