SUSE Certified Administrator in SUSE Linux Enterprise Server 15 SCA_SLES15 Exam Practice Test

Answer : E

The command that will display the value of a variable named TMPDIR is echo TMPDIR.Theechocommandwillprintitsargumentstothestandardoutput.The sign 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. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-variables

Answer : D, E

The basic components of RPM are RPM Database and RPM Package Manager. The RPM Database is a collection of files that store information about installed packages on the system. It is located in /var/lib/rpm by default. The RPM Package Manager is a set of tools and libraries that allow you to install, uninstall, query, verify, and manage RPM packages. It includes commands such as rpm, zypper, yast2, etc. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-rpm.html#sec-rpm-components

Answer : A, F

The -U option will install a package whether or not a previous version of the package is already installed. If a previous version exists, it will be upgraded. The -F option will install a package only if a previous version of the package is already installed. It will not install a new package. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-sw-cl.html#sec-rpm-commands

Answer : B

If the file1.txt file already exists in your home directory, the touch -7file1.txt command will change the access and modification times of the existing file1.txt file. The touch command can be used to create new empty files or update the timestamps of existing files. The -7 option specifies that only one timestamp should be changed instead of both. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-touch.html

Answer : A

https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html

When Bash is invoked as an interactive login shell, or as a non-interactive shell with the--loginoption, it first reads and executes commands from the file/etc/profile, if that file exists. After reading that file, it looks for~/.bash_profile,~/.bash_login, and~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The--noprofileoption may be used when the shell is started to inhibit this behavior.

The first file executed by a bash login shell is /etc/profile. This file sets global environment variables and aliases for all users. It may also source other files in /etc/profile.d/ directory. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-startup

Answer : B, D

Subvolumes in BtrFS are like virtual filesystems that can be mounted separately with the -o subvol= option. They can also have different attributes and quotas. Subvolumes do not have to start with ''@'' character, although some default subvolumes use this convention. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-btrfs.html#sec-btrfs-subvolumes

Answer : A

https://en.wikipedia.org/wiki/Virtual_Network_Computing#:~:text=VNC%20by%20default%20uses%20TCP,Java%2Denabled%20web%2Dbrowser.

VNC by default usesTCP port5900+N,[6][7]whereNis the display number (usually :0 for a physical display). Several implementations also start a basicHTTPserveron port 5800+Nto provide a VNC viewer as aJava applet, allowing easy connection through any Java-enabled web-browser. Different port assignments can be used as long as both client and server are configured accordingly. A HTML5 VNC client implementation for modern browsers (no plugins required) exists too.[8]

The default port a VNC Client uses to connect is TCP 5901. This port corresponds to the first display number (:1) of the VNC server. Each display number has its own port number, starting from 5900. For example, display :2 uses port 5902, display :3 uses port 5903, and so on. The user can specify a different port number if needed. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vnc-connect.html