sca_sles15 SUSE Certified Administrator in Enterprise Linux 15 Free Practice Exam Questions (2025 Updated)

The file that contains the list of DNS servers SLES will contact is /etc/resolv.conf. This file specifies one or more nameserver addresses that will be used to resolve hostnames to IP addresses. It may also contain other options such as search domains, sort lists, etc. The /etc/resolv.conf file can be generated automatically by network configuration tools or edited manually by the administrator. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-network-dns.html#sec-network-dns-resolv.conf

The command that is used to manage software RAID is mdadm. This command can be used to create, assemble, monitor, and manage multiple device (md) arrays that provide RAID functionality. It can also be used to query and modify various parameters and settings of md arrays. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-raid.html#sec-raid-mdadm

Firewalld uses two separated configuration sets, runtime, and permanent configuration.

The runtime configuration is the actual running configuration and it is not persistent on reboots. When the firewalld service starts it loads the permanent configuration which becomes the runtime configuration.

https://www.supportsages.com/everything-you-need-to-know-about-firewalld/#:~:text=Firewalld%20uses%20two%20separated%20configuration,which%20becomes%20the%20runtime%20configuration .

Firewalld maintains two separate configurations: runtime and permanent. The runtime configuration is the current state of the firewall that is applied to the system. It can be changed by various commands and tools without affecting the permanent configuration. The permanent configuration is the persistent state of the firewall that is stored in configuration files. It can be changed by various commands and tools with the --permanent option. The permanent configuration will take effect after reloading firewalld or rebooting the system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-firewall-firewalld.html#sec-firewall-firewalld-config

The command that will display the value of a variable named TMPDIR is echoTMPDIR.Theechocommandwillprintitsargumentstothestandardoutput.Thesign is used to reference the value of a variable in bash. If you omit the $ sign, echo will print the name of the variable instead of its value. If you use single quotes around the variable name, echo will also print the name instead of its value. If you use double quotes around the variable name, echo will print its value as expected. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-variables

The command that allows you to create an alias command is alias. The alias command can be used to define a short name or abbreviation for another command or sequence of commands. The syntax of the alias command is alias name=‘command’. For example, alias c=‘clear’ will create an alias named c for the clear command. You can then type c to run the clear command. To remove an alias, you can use unalias name. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-alias

To restrict access to your server via SSH to just a few specific users, you need to modify the AllowUsers option in the /etc/ssh/sshd_config file. This option specifies a list of user names or patterns that are allowed to log in via SSH. Any user name that does not match the list will be denied access. You need to restart the sshd service for the changes to take effect. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-ssh-server.html#sec-ssh-server-config

The network interface type supported by SLES that is used for link aggregation is bond. Link aggregation is a technique that combines multiple physical network interfaces into one logical interface for increased bandwidth and redundancy. A bond interface can use different modes and options to balance traffic and handle failures. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-network-bonding.html

https://documentation.suse.com/sles/12-SP4/html/SLES-all/cha-security-acls.html

The three permissions available on posix file systems are read, write, and execute. The read permission allows the user to view the contents of a file or directory. The write permission allows the user to modify or delete a file or directory. The execute permission allows the user to run a file as a program or change into a directory. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-file-permissions.html#sec-file-permissions-types

You can view manual pages by running the man command followed by a specific command name. If the man command is not installed on your system, install it by runningzypper install man.

https://documentation.suse.com/sles/15-GA/html/SLES-all/pre-sle.html

The command that is used to view the manual pages is man. The man command will display the formatted documentation for a given command, function, or file. The manual pages are organized into sections based on their type and purpose. The user can specify the section number and the name of the item to view its manual page. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-help.html#sec-cli-help-man

https://documentation.suse.com/ko-kr/sles/15-SP1/html/SLES-all/cha-network.html

The file that provides local name resolution is /etc/hosts. This file contains mappings of hostnames to IP addresses for hosts on the local network or hosts that are frequently accessed. The system will consult this file before querying DNS servers when resolving hostnames. This can improve performance and security, as well as provide fallback in case DNS servers are unavailable. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-network-dns.html#sec-network-dns-hosts

The two commands that are commonly used to compile and install from source code are ./configure and make install. The ./configure command will check the system for dependencies, set variables, and generate a Makefile. The make install command will use the Makefile to compile the source code and copy the binaries and files to the appropriate locations. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-software-install-source.html

The command that you would run to create an updated initial file system, if your server hardware requires additional drivers to be available for the kernel at boot up, is mkinitrd. This command will create or update the initrd file in /boot based on the current kernel and configuration files. The initrd file is an initial ramdisk image that contains the necessary drivers and tools to mount the root file system and start the boot process. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-boot-initrd.html

Assuming the default value for umask, which is 022, the permissions on new files would be set to 644 and the permissions on new directories would be set to 755. The umask value is subtracted from the base permissions of 666 for files and 777 for directories to determine the actual permissions. For example, 666 - 022 = 644 for files and 777 - 022 = 755 for directories. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-file-permissions.html#sec-file-permissions-umask

The commands that can display the groups of which a user is a member are groups and id. The groups command will print the names of all primary and secondary groups that a user belongs to. If no user name is specified, it will print the groups for the current user. The id command will print various information about a user’s identity, such as user ID (UID), group ID (GID), primary group name, secondary group names, etc. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-user-group.html#sec-user-group-display

When you launch yast2 without specifying a module name, the YaST Control Center appears. The YaST Control Center is a graphical interface that allows you to access various YaST modules for system administration and configuration tasks. You can browse through different categories of modules, such as Software, Hardware, System, Network Services, etc., and launch them by clicking on their icons. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-yast.html#sec-yast-control-center

The bash commands that result in a valid arithmetic expansion are:

TOTAL=$[8/2]

TOTAL=$((5+2))

((TOTAL++))

Arithmetic expansion is a bash feature that allows you to perform integer calculations and assign or use the result in a command or expression. There are two syntaxes for arithmetic expansion: [expression]and((expression)). The expression can contain variables, operators, parentheses, etc. The ((expression)) syntax can also be used without the $ sign for assignments or conditional tests. References: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-arithmetic

For programs to leverage PolKit they are split into two separate processes. The statements below that are true regarding these two PolKit processes are:

The Mechanism process runs in the System Context.

The Policy Agent process runs in the User Session.

The Mechanism process is responsible for performing privileged actions on behalf of unprivileged users. It runs as root in the System Context and communicates with PolKit via D-Bus. The Policy Agent process is responsible for requesting authorization from users when they attempt to perform privileged actions. It runs as a normal user in the User Session and communicates with PolKit via D-Bus. References: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-polkit.html#sec-polkit-processes

If you have a service named tftp, the command and options that would enable tftp to start automatically when the server starts are systemctl enable tftp. This command will create symbolic links in the appropriate systemd target directories to enable the tftp service unit. To start the service immediately, you can also use systemctl start tftp or systemctl enable --now tftp. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-systemd-services.html#sec-systemd-enable

To access updates for SLE, you need an account with SUSE Customer Center and a SLE Product Key. SUSE Customer Center is a web portal that allows you to manage your subscriptions, products, and services from SUSE. A SLE Product Key is a unique code that activates your subscription and entitles you to receive updates and support for your SLE product. You can register your product key with your SUSE Customer Center account and assign it to your system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-registration.html