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認定する1Z0-106試験問題解説集試験-試験の準備方法-ハイパスレートの1Z0-106日本語版

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Oracle 1Z0-106認定試験は、Oracle Linux 8高度システム管理の専門知識を検証したいプロフェッショナル向けに設計された業界で認められた認定試験です。この認定試験は、Oracle Linux 8システムの管理に関する高度な知識と経験を持つプロフェッショナルを対象としています。この試験は、ネットワーク、セキュリティ、ストレージ管理、高可用性などの高度なトピックスの知識を試験するように設計されています。

Oracle Linux 8 Advanced System Administration 認定 1Z0-106 試験問題 (Q53-Q58):

質問 # 53
Examine this command:
# auditctl -w /etc/passwd -p w -k pass
Which two statements are true upon execution?

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

正解：C、E

質問 # 54
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.

正解：B、D、E

解説：
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.

質問 # 55
Examine this command and output:
$ ftp host01.example.com
Connected to host01.example.com (192.168.40.131).
220 (vsFTPd 3.0.2)
Name (host01.example.com:oracle):
After entering a carriage return, this error message is displayed:
530 Permission denied
Login Failed
ftp>
Why is the oracle user denied access to the FTP server on host01.example.com?

A. The oracle user does not exist on host01.example.com.
B. LOCAL_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.
C. The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.
D. The oracle user is listed in /etc/vsftpd/ftpusers.
E. The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to YES in /etc/vsftpd/vsftpd.conf.

正解：D

質問 # 56
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. The rule applies to the input table.
C. The rule is applied to both IPv4 and IPv6 packets.
D. All traffic inbound on port 80 is dropped.
E. TCP packets outbound on port 80 are dropped.
F. TCP packets inbound on port 80 are dropped.

正解：C、F

解説：
* 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

質問 # 57
Examine this command and output:
# mdadm --detail /dev/md0
/dev/md0:
Creation Time: Tue Oct 27 16:53:38 2020
Raid Level: raid5
Array Size: 207872 (203.03 MiB 212.86 MB)
Used Dev Size: 103936 (101.52 MiB 106.43 MB)
Raid Devices: 3
Total Devices: 3
Persistence : Superblock is persistent
Update Time: Tue Oct 27 16:53:38 2020
State: clean, degraded, recovering
Active Devices: 2
Working Devices: 3
Failed Devices: 0
Spare Devices: 1
Layout: left-symmetric
Chunk Size: 512K
Rebuild Status: 60% complete
Name: ol8.example.com:0 (local to host ol8.example.com)
UUID: 70f8bd2f:0505d92d:750a781e:c224508d
Events: 66
Number Major Minor RaidDevice State
0 8 49 0 active sync /dev/sdd1
1 8 65 1 active sync /dev/sde1
3 8 81 2 spare rebuilding /dev/sdf1
Which two are true?

A. A RAID device failed and has returned to normal operating status.
B. The RAID set read and write performance is currently sub-optimal.
C. A new RAID device was just added to replace a failed one.
D. An extra device was added to this RAID set to increase its size.
E. Only write performance is currently sub-optimal on this RAID set.

正解：B、C

質問 # 58
......

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