Oracle 1Z0-460 Online Practice Questions and Exam Preparation

Oracle 1Z0-460 Online Questions & Answers

• Question 51:

  As a system administrator, you run the system-config-network tool and make changes to the configuration. You change the hostname and the DNS search path settings. Which two files will these changes be written into?

  A. "/etc/sysconfig/network" and "/etc/resolv.conf" files
  B. "/etc/sysconfig/network" and "etc/nsswitch.conf/" files
  C. "/etc/sysconfig/netconfig" and "/etc/resolv.conf" files
  D. "etc/sysconfig/network-scripts/network" and "/etc/resolv.conf" files
  C. "/etc/sysconfig/netconfig" and "/etc/resolv.conf" files

  ---

  The system-config-network-tui and system-config-network commands start a text-based network configuration tool.

  Navigate using the "tab", "arrow" and "return" keys. The "Device configuration" option gives a list of network devices.

  Selecting the device allows you to edit the adapter's network configuration, which is saved to the "/etc/ sysconfig/network-scripts/ifcfg-eth0" file. The "DNS configuration" option on the first screen allows you to modify the configuration in the "/etc/ sysconfig/network" and "/etc/resolv.conf" files.

  

• Question 52:

  Which two options can be completed when using the Firewall Configuration Tool, system config firewall?

  A. Write complex firewall rules for checking, logging, and rejecting inbound and outbound connections
  B. Enabling or disabling the firewall entirely
  C. Build a filter to obfuscate sensitive data (national ID numbers, Credit Cards, and so on)
  D. Select the services that have access to the network resource
  B. Enabling or disabling the firewall entirely
  C. Build a filter to obfuscate sensitive data (national ID numbers, Credit Cards, and so on)

  ---

  system-config-firewall

  The GUI screen to control the firewall is available from the menu (System > Administration > Firewall) or can be started from the command line using the system-config-firewall command.

  Once started, the toolbar provides buttons to allow the firewall to be enabled/disabled (B). You can also configure basic trusted services, such as SSH, FTP and HTTP (C), by putting a tick in the appropriate checkbox and clicking the "Apply"

  button on the toolbar.

  

  The "Other Ports" section allows you to open ports that are not covered in the "Trusted Services" section.

• Question 53:

  What happens when the following command is run? # authconfig - - passalgo = md5 - - update

  A. It produces the MD5 checksum of the input data.
  B. It configures the MD5 checksum for newly authored documents
  C. It converts the stdio input to MD5 algorithm.
  D. It changes the user password hashing algorithm to MD5.
  D. It changes the user password hashing algorithm to MD5.

  ---

  To configure the Linux system to use the MD5 algorithm, enter: # authconfig --passalgo=MD5 --update

  Note: The default algorithm for storing password hashes in /etc/shadow is MD5. I was told to use SHA-512 hashing algorithm. How do I set password hashing using the SHA-256 and SHA-512 under CentOS or Redhat Enterprise Linux 5.4?

  You need to use authconfig command to setup SHA-256/512 hashing. This command provides a simple method of configuring /etc/sysconfig/network to handle NIS, as well as /etc/passwd and /etc/shadow, the files used for shadow password support. Basic LDAP, Kerberos 5, and SMB (authentication) client configuration is also provided.

  Display Current Hashing Algorithm

  Type the following command: # authconfig --test | grep hashing

  Sample outputs:

  password hashing algorithm is md5 Configure Linux Server To Use The SHA-512 To configure the Linux system to use the SHA-512 algorithm, enter: # authconfig --passalgo=sha512 --update

• Question 54:

  View the cron job example below. How often will this cron job run? 0 */ 5 * * * command

  A. every 5 minutes
  B. every 5 hours
  C. every 5 days
  D. every 5th month
  B. every 5 hours

  ---

  Execute a cron job every 5 Hours The second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2nd field, it runs every 5 hours as shown below.

  0 */5 * * * /home/ramesh/backup.sh

• Question 55:

  Which three things does oracle-edbms-server-11gR2-preinstall RPM package do to simplify the installation of Oracle Database on Oracle Linux 6 systems?

  A. Downloads and installs various software packages and specific versions needed for Oracle database installation
  B. Downloads and installs packages required for Oracle Database installation, runs the runInstaller utility to install the database, and then starts the database
  C. Creates the Oracle user and the oinstall and dba groups, which are the default user and groups used during Oracle database installation
  D. Modifies and sets kernel parameters in /etc/sysctl.conf and sets shell resource limits in /etc/security/ limits.conf based on the Oracle Database Server installation requirements
  E. Checks whether all packages are installed to support RDBMS and then calls the Oracle Universal Installer utility to install RDBMS and then calls the Oracle Universal Installer utility to install RDBMS
  A. Downloads and installs various software packages and specific versions needed for Oracle database installation
  C. Creates the Oracle user and the oinstall and dba groups, which are the default user and groups used during Oracle database installation
  D. Modifies and sets kernel parameters in /etc/sysctl.conf and sets shell resource limits in /etc/security/ limits.conf based on the Oracle Database Server installation requirements

  ---

  In order to install the Oracle Database 11g R2 on Oracle Linux 6, your system needs to meet a few prerequisites, as outlined in the Linux Installation Guides. Using the Oracle RDBMS Server 11gR2 Pre- install RPM, you can complete most of the pre-installation configuration tasks.

  The package:

  *

  (A) Causes the download and installation of various software packages and specific versions needed for database installation, with package dependencies resolved via yum

  *

  (C) Creates the user oracle and the groups oinstall and dba, which are the defaults used during database installation

  *

  (D) Modifies kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, the maximum number of file descriptors, and so on

  *

  (D) Sets hard and soft shell resource limits in /etc/security/limits.conf, such as the number of open files, the number of processes, and stack size to the minimum required based on the Oracle Database 11g Release 2 Server installation requirements

  *

  Sets numa=off in the kernel boot parameters for x86_64 machines

• Question 56:

  The crond daemon checks each command to see whether it should be run in the current ___________.

  A. Second
  B. Minute
  C. Hour
  D. Day
  B. Minute

  ---

  The cron utility then wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.

• Question 57:

  You have kdump service enabled on your Oracle Linux system and experience a kernel crash. The crash dump file is created on your system, but you are not aware where this crash file was created. Which two places can you find the path information where the crash dump file is being generated on your system?

  A. Check the settings in the /etc/kdump.conf file.
  B. Check the settings in the /etc/sysconfig/kdump.conf file.
  C. Check the target settings by running the system-config-kdump command.
  D. Check the settings in the /proc/sys/kernel/crash.conf file.
  A. Check the settings in the /etc/kdump.conf file.
  C. Check the target settings by running the system-config-kdump command.

  ---

  A: When a kernel crash is captured, the core dump can be either stored as a file in a local file system, written directly to a device, or sent over a network using the NFS (Network File System) or SSH (Secure Shell) protocol. Only one of these options can be set at the moment, and the default option is to store the vmcore file in the /var/crash/ directory of the local file system. To change this, as root, open the /etc/ kdump.conf configuration file in a text editor and edit the options.

  C: You can use the system-config-kdump GUI to setup Kdump:

  

• Question 58:

  Which two statements describe the capabilities used with the Unbreakable Enterprise Kernel?

  A. Existing Red Hat Enterprise Linux 5 and 6 customers need to reinstall Oracle Linux to use the Unbreakable Enterprise Kernel.
  B. The Unbreakable Enterprise kernel is the default kernel starting with Oracle Linux 5.6.
  C. The Unbreakable Enterprise kernel is required when using multithreaded CPUs.
  D. Oracle Clusterware, OCFS2, and the Enterprise Manager pack for Linux support are included with Oracle Linux Basic and Premier support.
  E. Switching between the Red Hat Compatible kernel and the Unbreakable Enterprise kernel is simple process of changing kernels and glibc.
  D. Oracle Clusterware, OCFS2, and the Enterprise Manager pack for Linux support are included with Oracle Linux Basic and Premier support.
  E. Switching between the Red Hat Compatible kernel and the Unbreakable Enterprise kernel is simple process of changing kernels and glibc.

  ---

  *

  Commercial technical support is available through Oracle's Oracle Linux Support program, which supports Oracle Linux, and existing RHEL or CentOS installations (i.e. without reinstallation).

  Note:

  *

  The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested and optimized operating system kernel for Oracle Linux 5 and Oracle Linux 6. Unbreakable Enterprise Kernel Release 2 is based on the

  mainline Linux kernel version 3.0.16 and boasts a wide range of new features and improvements relevant for enterprise workloads.

  Incorrect:

  Not A, not B: Unbreakable Enterprise Kernel Release 2 can be installed on Oracle Linux 5 Update 8 or newer, as well as on Oracle Linux 6 Update 2 or newer.

• Question 59:

  Examine the following snippet from the rsyslog.conf file.

  kern.crit /dev/console kern.info; kern.!err /var/adm/kernel.log

  What do these two rules mean?

  A. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernel messages that come with priorities from info and up in the /var/adm/kernel.log file.
  B. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernel messages that come with priorities from info up to warning in the /var/adm/kernel.log file.
  C. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all messages that come with priorities from info and err in the /var/adm/kernel.log file.
  D. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernel messages that come with priorities other than info and err into the /var/adm/kernel.log file.
  B. Direct all kernel messages of the priority crit and higher to machine console. Additionally, log all kernel messages that come with priorities from info up to warning in the /var/adm/kernel.log file.

  ---

  Example:

  kern.* /var/adm/kernel kern.crit @finlandia;RFC3164fmt kern.crit /dev/console kern.info;kern.!err /var/adm/kernel-info

  The first rule direct any message that has the kernel facility to the file /var/adm/kernel.

  The second statement directs all kernel messages of the priority crit and higher to the remote host finlandia. This is useful, because if the host crashes and the disks get irreparable errors you might not be able to read the stored messages. If they're on a remote host, too, you still can try to find out the reason for the crash.

  The third rule directs these messages to the actual console, so the person who works on the machine will get them, too.

  The fourth line tells rsyslogd to save all kernel messages that come with priorities from info up to warning in the file /var/adm/kernel-info. Everything from err and higher is excluded.

• Question 60:

  Your Oracle Linux system has two network interfaces eth0 and eth1. You have to change the netmask and the IP address of the eth1 network interface. Which configuration file would you edit to make these changes?

  A. /proc/net/ifcg-eth1
  B. /etc/sysconfig/network-scripts/eth1
  C. /etc/sysconfig/network/ifcg-eth1
  D. /etc/sysconfig/network-scripts/ifcfg-eth1
  D. /etc/sysconfig/network-scripts/ifcfg-eth1

  ---

  The "/etc/sysconfig/network-scripts/ifcfg-eth0" file holds the network configuration for the "eth0" adapter. If you have multiple network adapters, you would expect additional configuration files (eth1, eth2 etc.).

  Note:

  * The "/etc/sysconfig/network" file holds top-level networking configuration, including the hostname and gateway settings.