Oracle 1Z0-100 Online Practice Questions and Exam Preparation

Oracle 1Z0-100 Online Questions & Answers

• Question 101:

  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.
  A. It supports named disk partitions.
  C. It supports disks greater than two terabytes.

  ---

  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 102:

  You have a single network adapter called eth0.

  DEVICE = eth0 BOOTPROTO=DHCP HWADR=BC:305B:C5:63;F1 NM_CONTROLLED=no ONBOOT=YES TYPE=Ethernet PEERDNS=no UUID=C9dba2e8-9faf-4b77-bbe2-92dd81dda1f9

  Which two Statement:; are true concerning eth0 based on this configuration?

  A. DHCP is used to obtain a lease on an IP address.
  B. The dhclient command may only be used to obtain a lease at boot time.
  C. dhclient does not override the contents of /etc/resolv.conf.
  D. DNS is not used to resolve host names for this adapter.
  E. dhclient overrides the contents of /etc/resolv.conf.
  A. DHCP is used to obtain a lease on an IP address.

  ---

  A: BOOTPROTO=DHCP

  C: PEERDNS=answer

  where answer is one of the following:

  yes -- Modify /etc/resolv.conf if the DNS directive is set. If using DHCP, then yes is the default.

  no -- Do not modify /etc/resolv.conf.

  Note: The "/etc/resolv.conf" file is used to configure the location of the DNS servers to be used for name resolution.

• Question 103:

  You want sendmail to deliver mail for these users:

  [email protected] to mailbox jsmith1 [email protected] to mailbox jsmith2 [email protected] to mailbox jsmith3

  In which sendmail configuration database can this requirement be defined?

  A. /etc/aliases
  B. /etc/mail/userdb
  C. /etc/mail/virtusertable
  D. /etc/mail/domaintable
  E. /etc/mail/genericstable
  C. /etc/mail/virtusertable

  ---

  /etc/mail/virtusertable

  This database file maps mail addresses for virtual domains and users to real mailboxes. These mailboxes can be local, remote, aliases defined in /etc/mail/aliases, or files. This allows multiple virtual domains to be hosted on one machine.

  The following example demonstrates how to create custom entries using that format:

  [email protected] root

  [email protected] [email protected]

  @example.com joe

• Question 104:

  Which statement correctly describes the default location of the GRUB bootloader code used by Oracle Linux? (Choose the best answer.)

  A. All of the GRUB bootloader code is written to the Master Boot Record (MBR)
  B. A portion of the GRUB bootloader code is written to the Master Boot Record (MBR) and the rest is written to the / filesystem
  C. All of the GRUB bootloader code is written to the /boot filesystem
  D. A portion of the GRUB bootloader code is written to the /boot filesystem and the rest is written to the / filesystem
  E. A portion of the GRUB bootloader code is written to the Master Boot Record (MBR) and the rest is written to the /boot filesystem
  E. A portion of the GRUB bootloader code is written to the Master Boot Record (MBR) and the rest is written to the /boot filesystem

• Question 105:

  Which four statements are true about the proc and sysfs filesystem?

  A. The sysfs filesystem contains information about processes.
  B. The proc filesystem contains information about CPUs.
  C. The proc filesystem contains information about memory.
  D. The sysfs filesystem contains information about CPUs.
  E. The sysfs filesystem contains information about memory.
  F. The proc filesystem contains information about the installer parameters.
  A. The sysfs filesystem contains information about processes.
  B. The proc filesystem contains information about CPUs.
  C. The proc filesystem contains information about memory.
  F. The proc filesystem contains information about the installer parameters.

  ---

  *

  sysfs is the Virtual Filesystem created during the 2.6 Kernel release cycle to show device information as procfs did not do this type of information that well.

  Memory etc has not been ported to sysfs as it was never intended to show that type of information so it is unlikely it will be ported at all.

  *

  sysfs is a virtual file system provided by Linux. Sysfs exports information about devices and drivers from the kernel device model to user space, and is also used for configuration.

• Question 106:

  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.
  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.

  ---

  *

  # 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 107:

  Examine the output shown:

  [root@FAROUT fs] # rpm 璹a | grep preinstall Oracle-rdbms-server-11gR2-preinstall-1.0-6.e16.x86_64

  [root@FAROUT fs] # rpm 璹1 oracle-rdbms-server-11gR2-preinstall-1.0-6.e16.x86_64 /etc/rc.d/init.d/ oracle-rdbms-server-11gR2-preinstall-firstboot /etc/sysconfig/Oracle-rdbms-server-11gR2-preinstall-verify /etc/sysconfig/oracle-rdbmsserver-11gR2-preinstall/Oracle-rdbms-server-11gR2-preinstall.param /usr/bin/oracle-rdbms-server-11gR2-preinstall-verify

  Which three statements are true about oracle-rdbms-server-11gR2-preinstall-1.0-6.e16.x86_64 rpm?

  A. It is a new name for oracle-validated package from Oracle Linux 5 that sets parameters to the same values.
  B. It creates the oracle user if not already created, which owns the Grid Infrastructure software should that get installed.
  C. It creates the grid user if not already created which owns the grid infrastructure software should that get installed.
  D. It modifies kernel parameters in /etc/sysctl.conf.
  E. It runs at the first boot after installing the packages to set a parameter indicating that is has run once.
  F. It modifies parameters in the /etc/sysconfig/network-scripts directly.
  G. It creates the osoper group, if not already created.
  C. It creates the grid user if not already created which owns the grid infrastructure software should that get installed.
  E. It runs at the first boot after installing the packages to set a parameter indicating that is has run once.
  F. It modifies parameters in the /etc/sysconfig/network-scripts directly.

• Question 108:

  Which two statements are true about administering the use of the Sudo command in Oracle Linux?

  A. visudo will never save the /etc/sudoers file if there are syntax errors in the file after editing.
  B. visudo prompts for an action if there are syntax errors in the /etc/sudoers file after editing.
  C. Using vi to edit /etc/sudoers opens the file read only.
  D. Multiple administrators may edit the /etc/sudoers file simultaneously using visudo but only one may save the edited result.
  E. Multiple administrators may edit the /etc/sudoers file simultaneously using vi but only one may save the edited result.
  A. visudo will never save the /etc/sudoers file if there are syntax errors in the file after editing.
  E. Multiple administrators may edit the /etc/sudoers file simultaneously using vi but only one may save the edited result.

  ---

  A: visudo parses the sudoers file after the edit and will not save the changes if there is a syntax error.

  E: visudo locks the sudoers file against multiple simultaneous edits Note:

  *

  sudo is configured through the file /etc/sudoers. Like with most Linux configuration files, any text following a pound sign in the sudoers file is a comment. Within the sudoers file, sets of commands, groups of users, and associate users or groups with command sets can be configured.

  *

  If you want to grant certain users authority to be able to perform specific administrative tasks via sudo, use the visudo command to modify the /etc/sudoers file. The sudo command offers a way to grant partial or full access to the root account without the users needing the root password.

• Question 109:

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

  ---

  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 110:

  You want to display the value of a shell variable called service after assigning a value as shown:

  SERVICE =ACCT S

  Which two settings will display the name of the variable and its value?

  A. set | grep service
  B. echo $SERVICE
  C. env | grep SERVICE
  D. env $SERVICE
  E. set $SERVICE
  B. echo $SERVICE
  C. env | grep SERVICE

  ---

  C: env - set the environment for command invocation

  If no utility operand is specified, the resulting environment shall be written to the standard output, with one name= value pair per line.