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1Z0-106 New Real Test, 1Z0-106 Passing Score

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Oracle Linux 8 Advanced System Administration Sample Questions (Q22-Q27):

NEW QUESTION # 22
Examine this command:
# auditctl -w /etc/passwd -p w -k pass
Which two statements are true upon execution?

A. An audit rule is defined with the keyword pass.
B. A write occurs to /etc/audit/audit.rules.
C. A write occurs to /etc/audit/rules.d/audit.rules.
D. An audit is defined that creates a log entry every time a write occurs to /etc/passwd.
E. An audit rule is defined that creates a log entry every time /etc/passwd is read.

Answer: A,D

Explanation:
* Option C (Correct):The-k passpart of theauditctlcommand defines a keyword (pass) for the audit rule.
This keyword helps in filtering and searching logs in the audit trail.
* Option D (Correct):The-w /etc/passwd -p wpart of the command sets up a watch on the/etc/passwdfile for write (w) operations. This audit rule will generate a log entry every time there is a write operation to
/etc/passwd.
* Option A (Incorrect):This command does not write directly to/etc/audit/rules.d/audit.rules; it defines a rule in memory that could be saved to this file later.
* Option B (Incorrect):The rule only logs write (w) operations; it does not log read operations.
* Option E (Incorrect):The command does not directly cause a write to/etc/audit/audit.rules.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Auditing and System Logs
* man auditctlfor details on audit rules and options.

NEW QUESTION # 23
Which three statements are true about the journalctl command?

A. journalctl -p notice..warning shows all messages from notice to warning log level since the last boot.
B. journalctl -p err shows only error log level.
C. journalctl -bl -p err fails if journal persistence is not configured.
D. journalctl -p 6 shows all info log level messages and above.
E. journalctl -k shows kernel logs since the last boot.

Answer: B,D,E

Explanation:
Option B: journalctl -p err shows only error log level.
* Explanation:
* The -p or --priority option in journalctl filters messages by their priority level.
* When specifying asingle priority level, journalctl shows messagesonlyat that level.
* The priority levels, as per syslog standards, are:
* 0: emerg
* 1: alert
* 2: crit
* 3: err
* 4: warning
* 5: notice
* 6: info
* 7: debug
* Therefore, journalctl -p err displays messages with priorityerr (3)only.
* Oracle Linux Reference:
* OracleLinux 8: Managing Log Files- Section onFiltering Output withjournalctl:
"Use the -p option to display messages from the journal that have a specific priority level."
* Example:
# journalctl -p err
Option D: journalctl -k shows kernel logs since the last boot.
* Explanation:
* The -k or --dmesg option filters messages from the kernel, equivalent to the output of the dmesg command.
* This option implies -b, which limits the output to messages from the current boot.
* Therefore, journalctl -k displays kernel messages since the last boot.
* Oracle Linux Reference:
* OracleLinux 8: Managing Log Files- Section onViewing Kernel Messages:
"Use the journalctl -k command to display kernel messages since the last system boot."
* Example:
# journalctl -k
Option E: journalctl -p 6 shows all info log level messages and above.
* Explanation:
* When specifying a single numeric priority, journalctl displays messages withthat priority level and higher priority levels(i.e., lower severity).
* Priority levels are ordered from 0 (highest severity) to 7 (lowest severity).
* Therefore, journalctl -p 6 shows messages with priorities:
* 0 (emerg)
* 1 (alert)
* 2 (crit)
* 3 (err)
* 4 (warning)
* 5 (notice)
* 6 (info)
* This includesinfo level messages (6)and all higher priority messages.
* Oracle Linux Reference:
* OracleLinux 8: Managing Log Files- Section onFiltering Output with journalctl:
"When you specify a single priority level, journalctl shows messages at that level and higher severity."
* Example:
# journalctl -p 6
Why Other Options Are Not Correct:
* Option A:journalctl -bl -p err fails if journal persistence is not configured.
* Explanation:
* The -b option displays messages from the current boot. This works even if journal persistence isnotconfigured because the logs from the current boot are stored in volatile memory (/run/log/journal).
* Therefore, the command doesnot failif journal persistence is not configured.
* Oracle Linux Reference:
* OracleLinux 8: Managing Log Files- Section onJournal Volatility:
"By default, the journal stores logs in volatile memory and does not persist logs across reboots unless persistent storage is configured."
* Option C:journalctl -p notice..warning shows all messages from notice to warning log level since the last boot.
* Explanation:
* The -p option allows specifying arangeof priorities. However, the correct order for the range should be from thehigher priority (lower number)to thelower priority (higher number).
* Also, the priorities should be specified in the correct sequence, and ranges are inclusive.
* Moreover, journalctl by default shows messages from all boots unless limited by the -b option.
* Therefore, without -b, it does not limit messages to "since the last boot," making the statement incorrect.
* Correct Command:
* To display messages fromwarning (4)tonotice (5), the command should be:
# journalctl -p warning..notice -b
* But even then, the priorities need to be specified correctly, and the command in Option C is incorrect.
Conclusion:
OptionsB,D, andEare correct because they accurately describe the behavior of the journalctl command in filtering and displaying log messages based on priority levels and sources.

NEW QUESTION # 24
Which two statements are true about the at and batch commands?

A. at schedules the execution of recurring tasks.
B. batch schedules the execution of recurring tasks.
C. Both at and batch read from standard input, or you can specify a file and execute the commands with the -f option.
D. at executes a one-time task to run at a specific time.
E. batch executes a task when the system load average is greater than 0.8.

Answer: C,D

Explanation:
Explanation of Answer C:Bothatandbatchcan accept commands from standard input or from a file specified using the-foption. This allows scheduling of tasks by providing the commands directly or reading them from a file.
Explanation of Answer E:Theatcommand schedules a one-time task to run at a specified time. It is used to execute commands once at a particular time in the future.

NEW QUESTION # 25
Which mdadm command creates a RAID-1 device consisting of two block volumes and one spare device?

A. mdadm -create /dev/md0 -level=1 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev/xvdd3
B. mdadm -create /dev/md0 -level=0 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev/xvdd3
C. mdadm -create /dev/md0 -level=5 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev/xvdd3
D. mdadm -create /dev/md0 -level=1 -raid-devices=2 /dev/xvdd1 /dev/xvdd2

Answer: A

NEW QUESTION # 26
Which three statements are true about DNF modules?

A. Streams cannot declare dependencies on the streams of other modules.
B. Switching an enabled module stream automatically changes installed packages.
C. Profiles are used to provide alternate versions of the same module.
D. Installing a module allows a user to select a specific stream.
E. Modules are a group of packages that are installed together along with dependencies.
F. Streams are used to define optional configurations of modules.
G. Packages exist in multiple streams, where each stream contains a different version.

Answer: D,E,G

Explanation:
Understanding DNF Modules:
DNF modules in Oracle Linux 8 provide a way to offer different versions of software (packages) to users, allowing them to choose the version that best suits their needs. Modules help in managing multiple versions of software by grouping packages, defining streams, and using profiles for configurations.
Option A: Modules are a group of packages that are installed together along with dependencies.
* Explanation:
* Modulesare collections of packages that are grouped together to represent an application, language runtime, or any logical set.
* When you install a module, you are installing a set of packages along with their dependencies.
* This grouping ensures that all necessary components are installed for the software to function correctly.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-About Modules:
"A module is a group of packages that represents a component, such as an application, a language runtime, or a set of tools." Option B: Installing a module allows a user to select a specific stream.
* Explanation:
* Streamsin a module represent different versions of the software.
* When installing a module, you can select a specific stream to install the desired version.
* This allows users to choose between multiple versions of the same software provided within the module.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-About Module Streams:
"Each module can have one or more streams, which represent versions of the module content."
* Example Command:
# dnf module list nodejs
* This command lists available streams for the nodejs module.
Option F: Packages exist in multiple streams, where each stream contains a different version.
* Explanation:
* Within a module, each stream can contain different versions of the packages.
* This means the same package can exist in multiple streams but with different versions in each stream.
* This setup allows users to install the version of the software that meets their requirements.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-About Module Streams:
"Different streams can contain different versions of the software, allowing you to select the version that best suits your needs." Why Other Options Are Incorrect:
Option C: Profiles are used to provide alternate versions of the same module.
* Explanation:
* Profilesdefine sets of packages within a module stream for specific use cases or configurations, not alternate versions.
* Streams provide alternate versions, whereas profiles provide different package sets within a stream.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-About Module Profiles:
"A profile is a list of packages that defines a particular use case for a module stream." Option D: Streams are used to define optional configurations of modules.
* Explanation:
* Streams define different versions of software, not optional configurations.
* Optional configurations are managed through profiles within a stream.
* Oracle Linux Reference:
* Profiles handle configurations, while streams handle versions.
Option E: Streams cannot declare dependencies on the streams of other modules.
* Explanation:
* Streams can declare dependencies on specific streams of other modules.
* This allows modules to work together with compatible versions.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-Module Dependencies:
"Modules can declare dependencies on specific streams of other modules." Option G: Switching an enabled module stream automatically changes installed packages.
* Explanation:
* Switching streams does not automatically change installed packages.
* You must reset the module and install the new stream's packages manually.
* Oracle Linux Reference:
* OracleLinux 8: Managing Software-Switching Module Streams:
"To switch to a different module stream, you must reset the module and then install the packages from the new stream." Conclusion:
* Correct Options:A, B, F
* Summary:Modules group packages with dependencies, installing a module allows selecting a specific stream (version), and packages can exist in multiple streams with different versions.

NEW QUESTION # 27
......

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