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Oracle 1Z0-106 certification exam consists of 80 multiple-choice questions that must be completed within 150 minutes. Candidates must score at least 63% to pass the exam and earn the certification. Upon passing the exam, candidates will receive a certificate and gain access to the Oracle Certified Professional community, which provides exclusive access to training, resources, and networking opportunities.

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Oracle Linux 8 Advanced System Administration Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which two statements are true about the configuration and use of cron or anacron?

A. anacron jobs are used to run cron jobs if the system was powered off when they were scheduled to run.
B. The crond daemon looks for jobs only in /etc/crontab.
C. cron jobs may run only once a minute.
D. anacron jobs may run only once a day.
E. All crontabs are held in the /etc/cron.d directory.

Answer: A,D

Explanation:
Option D: anacron jobs may run only once a day.
* Explanation:
* Anacronis designed for systems that are not running continuously (e.g., desktops or laptops that may be powered off at night). It ensures that scheduled tasks are executed at the specified intervals.
* Anacron jobs are defined with periods indays. The minimal unit of time for scheduling in Anacron isone day. Therefore, Anacron can schedule jobs to runonce a dayat most.
* It is not intended for tasks that need to run multiple times per day.
* Oracle Linux Reference:
* OracleLinux 8: Scheduling Tasks- Section onAnacron Configuration Files:
"Anacron is used to run commands periodically with a frequency specified in days." Option E: anacron jobs are used to run cron jobs if the system was powered off when they were scheduled to run.
* Explanation:
* Anacron complements Cron by ensuring thatscheduled jobs are not missedif the system is powered off or in standby mode at the time they were supposed to run.
* When the system boots up, Anacron checks for any scheduled jobs that did not run and executes them accordingly.
* This is particularly useful for laptops or desktops that are not always on.
* Oracle Linux Reference:
* OracleLinux 8: Scheduling Tasks- Section onUnderstanding Anacron:
"Anacron is designed to run commands periodically with specified frequency, but unlike cron, it does not assume that the system is running continuously." Why Other Options Are Not Correct:
* Option A:cron jobs may run only once a minute.
* Explanation:
* Cron allows scheduling tasks with a minimum granularity ofone minute. However, this means that tasks can be scheduled to runevery minute, not limited to only once a minute.
* Multiple cron jobs can be scheduled to run at the same minute.
* Therefore, the statement is misleading; cron jobs can runas frequently as every minute, but notonly once a minute.
* Option B:All crontabs are held in the /etc/cron.d directory.
* Explanation:
* The /etc/cron.d directory is used for system-wide cron jobs provided by packages or administrators.
* User-specific cron jobs are stored in /var/spool/cron/ or managed via the crontab command and not placed in /etc/cron.d.
* Additionally, the system crontab file is /etc/crontab, and there are also directories like /etc
/cron.hourly, /etc/cron.daily, etc.
* Option C:The crond daemon looks for jobs only in /etc/crontab.
* Explanation:
* The crond daemon checks multiple locations for scheduled jobs:
* User crontabs managed via the crontab -e command (stored in /var/spool/cron/).
* System-wide crontab file (/etc/crontab).
* The /etc/cron.d/ directory.
* The /etc/cron.hourly/, /etc/cron.daily/, /etc/cron.weekly/, and /etc/cron.monthly/ directories.
* Therefore, crond does not look for jobsonlyin /etc/crontab.
Conclusion:
OptionsDandEare correct because they accurately describe the characteristics and purposes of Anacron in the context of scheduling tasks on an Oracle Linux system.

NEW QUESTION # 39
Which two default user account settings are contained in /etc/login.defs?

A. Encryption method used to encrypt passwords.
B. Password aging controls.
C. Group hashed passwords.
D. Decryption method used to decrypt passwords.
E. User hashed passwords.

Answer: A,B

Explanation:
Explanation of Answer D:The/etc/login.defsfile in Oracle Linux contains configuration settings related to user account policies, including password aging controls. This includes settings such asPASS_MAX_DAYS, PASS_MIN_DAYS, andPASS_WARN_AGE, which define the maximum number of days a password is valid, the minimum number of days between password changes, and the number of days before password expiration to warn users, respectively.
Explanation of Answer E:The/etc/login.defsfile also contains settings for the encryption method used to encrypt user passwords. TheENCRYPT_METHODparameter specifies the hashing algorithm, such as SHA512, that is used to encrypt user passwords stored in/etc/shadow.

NEW QUESTION # 40
Examine this command:
# nft add rule inet filter input tcp dport 80 drop
Which two statements are true upon execution?

A. The rule updates the configuration on disk.
B. All traffic inbound on port 80 is dropped.
C. TCP packets inbound on port 80 are dropped.
D. The rule applies to the input table.
E. TCP packets outbound on port 80 are dropped.
F. The rule is applied to both IPv4 and IPv6 packets.

Answer: C,F

Explanation:
* Option A (Correct):The rule is applied to both IPv4 and IPv6 packets. Theinettable is used for filtering both IPv4 and IPv6 traffic, and since the rule is added to theinettable, it affects both IP versions.
* Option E (Correct):The rule drops TCP packets inbound on port 80. The rule specifies theinputchain in thefiltertable, and it drops (drop) all TCP traffic (tcp) destined for port 80 (dport 80), which means any incoming TCP traffic on port 80 will be dropped.
* Option B (Incorrect):The command does not automatically update the configuration on disk; the rule is applied immediately in memory but does not persist across reboots unless explicitly saved.
* Option C (Incorrect):The rule specifies TCP packets only, not all traffic. Therefore, it does not drop traffic for protocols other than TCP.
* Option D (Incorrect):Although this statement is correct, it is less specific than Option A, which is more accurate because it mentions both IP versions.
* Option F (Incorrect):The rule applies to inbound traffic, not outbound, so it does not drop outbound traffic.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Managing Firewall Rules with nftables

NEW QUESTION # 41
As root you configured a file system using AutoFS with default settings. In the first session, you changed to a directory under AutoFS control. In a second session, you changed to /etc. Now the idle time for the session expires. Which two statements are true about the status of the file system mounted in the first session?

A. It remains mounted until you switch to a directory outside the current mount point.
B. It was unmounted when the second session began.
C. It was unmounted from the first session when the timer expired.
D. It remains mounted as long as the system is running.
E. It remains mounted until you log out from the first session.

Answer: A,E

Explanation:
Understanding AutoFS Behavior:
* AutoFSautomatically mounts file systems when accessed and unmounts them after a period of inactivity (default is 5 minutes).
* A file system remains mounted as long as it isactive, meaning processes are accessing files or directories within it.
Scenario Analysis:
* First Session:
* Changed to a directory under AutoFS control (mount point is active).
* Second Session:
* Changed to /etc (does not affect the first session).
* Idle Time Expires:
* AutoFS checks for idle mounts to unmount.
Implications:
* The mount point remainsactivebecause the shell in the first session is in the AutoFS directory.
* AutoFS willnotunmount the file system while it is active.
Oracle Linux Reference:
* OracleLinux 8: Configuring File Systems-Using the Automounter:
"A file system remains mounted as long as there are open files or directories within it." Correct Options:
* Option B:The file system remains mounted until you log out from the first session.
* Option E:The file system remains mounted until you switch to a directory outside the current mount point.
Why Other Options Are Incorrect:
* Option A:Incorrect because the mount does not persist indefinitely; it's unmounted when no longer active.
* Option C:Incorrect because the mount is still active; the timer does not cause unmounting in this case.
* Option D:Incorrect because the second session does not influence the mount status in the first session.

NEW QUESTION # 42
The ss command was invoked with options to:
* limit output to all listening and non-listening TCP ports
* display ports instead of the protocols that typically use those ports
* display all available internal TCP information
* display only connections whose source or destination port is 80
Which two results are produced by the command?

A. UNCONN 0 0 [::1]:323 [::]:*
B. tcp CLOSE-WAIT 32 0 server.example.com:44732 12.21.0.15:https
C. LISTEN 0 511 *:80 *:* cubic cwnd:10
D. icmp6 UNCONN 0 0 *:58 *:*
E. ESTAB 0 0 10.12.18.92:50384 169.254.169.254:80 cubic wscale:9,7 rto:201 rtt: 0.226/0.113 ato:40 mss:8948 pmtu:9000 rcvmss:1728 advmss:8948 cwnd:10 bytes_sent:142 bytes_acked:143 bytes_received:1728 segs_out:4 segs_in:3 data_segs_out:1 data_segs_in:1 send 3167433628bps lastsnd:
11351 lastrcv: 11351 lastack:11351 pacing_rate 6334867256bps delivery_rate 504112672bps delivered:
2 app_limited rcv_space:62720 rcv_ssthresh:56588 minrtt:0.142

Answer: C,E

Explanation:
Explanation of Answer C:Thesscommand can be used to display all available internal TCP information, including established connections with detailed TCP metrics, which matches the output in Answer C.
Explanation of Answer D:Thesscommand can display listening ports (TCP in this case) with details like congestion control algorithms (cubic), which aligns with Answer D. The output indicates a listening TCP socket on port 80.

NEW QUESTION # 43
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