1z1-106 PDF問題集で2025年03月19日試験問題 有効な1z1-106問題集 [Q33-Q57]

1z1-106 PDF問題集で2025年03月19日試験問題 有効な1z1-106問題集

究極の1z1-106準備ガイドで無料最新のOracle練習テスト問題集

Oracle Linux 8 Advanced System Administration認定を取得することで、雇用主やクライアントに、Oracle Linux 8システムを効果的に管理するために必要な専門知識とスキルを持っていることを証明することができます。これは、Oracleテクノロジーを扱うLinux管理者がキャリアを進めたい場合には貴重な資格です。

 

質問 # 33
Which two statements are true about naming network interfaces?

• A. Device names cannot be manually configured.
• B. The udev device manager uses a random number if all other schemes fail.
• C. Consistent device naming is enabled by default.
• D. Device names incorporate the physical location and hot plug slot index number.
• E. The udev device manager generates device names based on a series of schemes.

正解：C、E

解説：
Explanation of Answer A:Consistent network device naming is enabled by default in Oracle Linux 8. This feature ensures that network interfaces retain their names across reboots, which is important for maintaining network configuration consistency. This is managed through the Predictable Network Interface Names feature, which is part of thesystemdproject and is implemented inudev.
Explanation of Answer B:Theudevdevice manager is responsible for dynamically managing device nodes in the/devdirectory. It generates network interface names based on several naming schemes, such as the interface's physical location on the bus (likeenp0s3), MAC address, or other attributes. These schemes are used to provide consistent and predictable names for network interfaces.

質問 # 34
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. LISTEN 0 511 *:80 *:* cubic cwnd:10
• B. UNCONN 0 0 [::1]:323 [::]:*
• C. icmp6 UNCONN 0 0 *:58 *:*
• D. tcp CLOSE-WAIT 32 0 server.example.com:44732 12.21.0.15:https
• 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

正解：A、E

解説：
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.

質問 # 35
Examine this command:
# nft add rule inet filter input tcp dport 80 drop
Which two statements are true upon execution?

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

正解：B、F

質問 # 36
Which two statements are true about systemd system and service manager?

• A. systemd service units expose kernel devices and can be used to implement device-based activation.
• B. systemd is backward-compatible with the System V init scripts that were used in earlier versions of Oracle Linux.
• C. systemd is the first process that starts after the system boots and is the final process left running before the system shuts down.
• D. The service command is used to start and stop system service units.
• E. systemd reads /etc/system to determine which services to start.

正解：B、C

解説：
Explanation of Answer B:systemdis the first process to start (PID 1) after the Linux kernel has booted and is responsible for initializing the user space and managing system services throughout the system's runtime. It is also the last process to stop during shutdown.
Explanation of Answer C:systemdmaintains backward compatibility with older System V init scripts. It can run and manage these scripts, ensuring legacy services are supported while providing newer functionalities through nativesystemdunit files.

質問 # 37
Which two are true about using Ksplice?

• A. It can patch the kernel without shutting down the system.
• B. Yum cannot upgrade a kernel patched by Ksplice
• C. The Ksplice client is freely available to all customers.
• D. Ksplice can be used without a network connection
• E. Ksplice has two clients; each can run in three different modes.

正解：A、B

質問 # 38
Which two statements are true about the at and batch commands?

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

正解：D、E

質問 # 39
Which two methods of changing kernel parameters can you use to modify values for the running system?

• A. Using the echo command to write values to specific files in the /proc/sys directory.
• B. Adding to or modifying parameters and values in the /etc/sysctl.conf file followed by issuing the sysctl - p command.
• C. Issuing the sysctl -w command to write values to specific files in the /sys directory.
• D. Issuing the sysctl -w command to write values to specific files in the /proc/sys directory.
• E. Using the echo command to write values to specific files in the /sys directory.

正解：A、D

解説：
Explanation of Answer A:Thesysctl -wcommand is used to modify kernel parameters at runtime. It allows you to set the value of a specific parameter in the/proc/sysdirectory. For example,sysctl -w net.ipv4.
ip_forward=1will enable IP forwarding by writing the value directly to the corresponding file in/proc/sys.
Explanation of Answer B:Using theechocommand to write values directly to specific files in the/proc
/sysdirectory is another method to change kernel parameters dynamically for the running system. For instance, echo 1 > /proc/sys/net/ipv4/ip_forwardachieves the same effect as thesysctl -wcommand.

質問 # 40
Which two statements are true about removing a physical volume (PV) from a volume group (VG)?

• A. It can be removed when an inactive logical volume is on the VG.
• B. It can be removed when an active VG has mounted file systems by running vgexport.
• C. It can be removed only after removing it from its VG by using vgreduce.
• D. It can be removed when it is part of an active VG.
• E. It cannot be removed when it is part of an active VG.

正解：A、C

解説：
To remove a physical volume (PV) from a volume group (VG), it must first be removed using thevgreducecommand. This operation ensures that the VG no longer contains any references to the PV being removed.
Explanation of Answer D:A physical volume can be removed if there are no active logical volumes (LVs) on the VG that require space from that PV. If the LV is inactive, the PV can be safely removed from the VG.

質問 # 41
Which is true about the /etc/sysconfig directory in an Oracle Linux 8 system?

• A. It is used to access device and device driver information.
• B. Files in this directory hierarchy contain information about system hardware.
• C. Its contents depend on the packages installed on the system.
• D. Files in this directory hierarchy contain information about running processes.

正解：C

質問 # 42
Which takes precedence for ssh program configuration?

• A. ~/.ssh/config
• B. /etc/ssh/sshd_config
• C. Command line
• D. /etc/ssh/ssh_config

正解：C

質問 # 43
Which two statements are true about naming network interfaces?

• A. Device names cannot be manually configured.
• B. The udev device manager uses a random number if all other schemes fail.
• C. Consistent device naming is enabled by default.
• D. Device names incorporate the physical location and hot plug slot index number.
• E. The udev device manager generates device names based on a series of schemes.

正解：C、E

質問 # 44
Which three statements are true about DNF modules?

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

正解：A、F、G

解説：
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.

質問 # 45
Which two statements are true about fdisk?

• A. It can divide logical devices into one or more block disks called partitions.
• B. It can partition disks larger than 2 TB by using a GPT partition table.
• C. fdisk -l displays disk size information for all disks.
• D. It understands GPT, MBR, and HFS partition tables.
• E. It cannot partition disks larger than 2 TB by using a GPT partition table.

正解：C、E

解説：
* Option B (Correct):Thefdisk -lcommand lists information about all available disks, including their sizes, partition tables, and partition details.
* Option E (Correct):fdiskcannot handle disks larger than 2 TB because it is limited to the Master Boot Record (MBR) partitioning scheme. To manage larger disks (over 2 TB), the GUID Partition Table (GPT) is required, andfdiskdoes not fully support GPT.
* Option A (Incorrect):fdiskdoes not support HFS (Hierarchical File System, used by macOS). It primarily supports MBR and has limited support for GPT.
* Option C (Incorrect):fdiskdoes not support partitioning disks larger than 2 TB with GPT; gdiskorpartedshould be used instead.
* Option D (Incorrect):fdiskdoes not divide logical devices into block disks called partitions; it operates on physical storage devices to create partitions.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Managing Disks and Partitions
* man fdiskfor more details on the usage and limitations of thefdiskutility.

質問 # 46
Which two statements are true about control groups (cgroups) in Oracle Linux 8?

• A. Oracle Linux 8 implements cgroups v2 by default.
• B. A cgroup is a collection of processes bound to a set of limits or parameters defined in the cgroups filesystem.
• C. The cgroups filesystem allows limits to be overwritten in the lower levels of the hierarchy.
• D. Different controllers from cgroups version 1 and cgroups version 2 cannot be used at the same time.
• E. Cgroups allow processes to be organized into hierarchical groups whose resource usage cannot be limited and monitored.

正解：A、B

質問 # 47
Which statement is true about slice units?

• A. A slice unit accepts multiple names by the creation of additional symlinks to the unit file.
• B. The system.slice contains all system services and user sessions.
• C. A slice unit is a concept for hierarchically managing resources in a group of processes.
• D. Processes in a slice unit are named at the same level as scopes and services.

正解：C

質問 # 48
Which two are true about using Ksplice?

• A. It can patch the kernel without shutting down the system.
• B. The Ksplice client is freely available to all customers.
• C. Ksplice can be used without a network connection
• D. Ksplice has two clients; each can run in three different modes.
• E. Yum cannot upgrade a kernel patched by Ksplice

正解：A、C

解説：
Option A: Ksplice can be used without a network connection
* Explanation:
* Ksplice provides anOffline Clientspecifically designed for systems that do not have a direct connection to the internet. This client allows administrators to download Ksplice updates on a system with internet access and then transfer them to the offline system for installation.
* This means Ksplice can be effectively used in environments with strict security policies where network connectivity is restricted or not available.
* Oracle Linux Reference:
* OracleLinux 8: Ksplice User's Guide- Section on "Using the Ksplice Offline Client":
"The Ksplice Offline client enables you to apply Ksplice updates to systems that do not have direct access to the Internet or to the Oracle Uptrack server." Option B: It can patch the kernel without shutting down the system.
* Explanation:
* The primary purpose of Ksplice is to allow administrators to apply critical security patches to the running kernelwithout requiring a rebootor shutting down the system. This ensures high availability and minimizes downtime, which is crucial for production environments.
* Ksplice works by performingjust-in-time (JIT) compilationof kernel patches and applying them directly to the running kernel in memory.
* Oracle Linux Reference:
* OracleLinux 8: Ksplice User's Guide- Introduction:
"Ksplice enables you to keep your systems up to date and secure by applying important kernel security updates without rebooting." Why Other Options Are Not Correct:
* Option C:Yum cannot upgrade a kernel patched by Ksplice
* Explanation:
* This statement is false. While Ksplice patches the running kernel in memory, yum can still upgrade the kernel packages on disk. After a yum kernel update, a reboot would be necessary to run the new kernel version, but yum operations are not hindered by Ksplice patches.
* Oracle Linux Reference:
* OracleLinux 8: Ksplice User's Guide- Compatibility with Package Managers:
"Ksplice works seamlessly with package management tools like yum and dnf. You can continue to use these tools to manage your kernel packages."
* Option D:Ksplice has two clients; each can run in three different modes.
* Explanation:
* While Ksplice does have two clients (the online and offline clients), the statement about each running in three different modes is inaccurate or misleading. The clients do not operate in "three different modes" per se.
* Oracle Linux Reference:
* No official documentation supports the claim of "three different modes" for each client.
* Option E:The Ksplice client is freely available to all customers.
* Explanation:
* Ksplice is a feature available to customers with an active Oracle Linux Premier Support subscription. It is not freely available to all users.
* Oracle Linux Reference:
* OracleLinux 8: Ksplice User's Guide- Access Requirements:
"To use Ksplice, your system must be covered by an Oracle Linux Premier Support subscription." Conclusion:
Options A and B are correct because Ksplice can be used without a network connection via the offline client, and it allows patching the kernel without shutting down the system, ensuring minimal downtime.

質問 # 49
Which two statements are true about the proc and sys file systems?

• A. sys contains a list of mounted devices.
• B. proc contains information about memory and CPUs.
• C. proc contains a list of network drivers.
• D. sys contains information about memory and CPUs.
• E. sys contains a list of running processes.

正解：B、D

解説：
* Option A (Correct):The/procfile system is a pseudo-file system that contains runtime system information (e.g., system memory, mounted devices, hardware configuration, etc.). Files such as/proc
/meminfoand/proc/cpuinfoprovide detailed information about memory and CPUs, respectively.
* Option C (Correct):The/sysfile system, also known as sysfs, provides a view of the kernel's device model. It contains information about system hardware, including CPUs and memory. For example,/sys
/devices/system/cpu/contains directories and files that provide detailed information about each CPU.
* Option B (Incorrect):The/sysfile system does not contain a list of running processes. Running processes are listed in the/procfile system, with each process having its own directory under/proc.
* Option D (Incorrect):/procdoes not contain a list of network drivers specifically. Network driver information is available under/proc/net, but this does not equate to a list of drivers.
* Option E (Incorrect):The/sysfile system does not contain a list of mounted devices. Mounted devices are listed in/proc/mountsor the/etc/mtabfile.
Oracle Linux Reference:For more details, see:
* OracleLinux 8: The/procand/sysFile Systems.

質問 # 50
Which two statements are true about the configuration and use of cron or anacron?

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

正解：B、D

解説：
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.

質問 # 51
Which are three of the network bonding modes supported in Oracle Linux 8?

• A. Poison Reverse
• B. Split Horizon
• C. Multicast
• D. 802.3ad
• E. Round-robin
• F. Active Backup
• G. Passive Backup

正解：D、E、F

解説：
* Option B (Correct):Round-robin is a network bonding mode that distributes outgoing traffic evenly across all active network interfaces.
* Option D (Correct):802.3ad (LACP - Link Aggregation Control Protocol) is a bonding mode that allows dynamic aggregation of links conforming to the IEEE 802.3ad standard.
* Option F (Correct):Active Backup is a bonding mode where one interface is active while the other is in standby, providing redundancy.
* Options A, C, E, G (Incorrect):Multicast, Split Horizon, Poison Reverse, and Passive Backup are not valid bonding modes in Oracle Linux 8.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Network Bonding Guide

質問 # 52
Which two types of reports does iostat generate?

• A. CPU Utilization Report
• B. Device Utilization Report
• C. Storage Utilization Report
• D. Memory Utilization Report
• E. Swap Utilization Report

正解：A、B

質問 # 53
Examine the access privileges on this directory:
drwx------ 2 user1 test 4096 Nov 6 10:12 my_directory/
You must enable another user to read and navigate to my_directory. Which command will do this?

• A. setfacl --modify group:test:r-- my_directory
• B. setfacl --modify user:user2:r-- my_directory
• C. setfacl -x user:user2 my_directory
• D. setfacl --modify user:user2:r-x my_directory
• E. setfacl --default --modify user:user2:rw- my_directory

正解：D

質問 # 54
Which two statements are true about kernel boot parameters?

• A. Parameters passed to the kernel from the GRUB 2 menu are persistent and apply to all subsequent reboots.
• B. Each kernel version's boot parameters are stored in independent configuration files in/boot/loader
  /entries.
• C. Boot parameters are defined as values for the GRUB_CMDLINE_LINUX directive in the /etc/default
  /grub file.
• D. Boot parameters defined as values for the GRUB_BOOT command-line interface are persistent and apply to all subsequent reboots.

正解：B、C

解説：
* Option A (Correct):Boot parameters are set in/etc/default/grubunder
theGRUB_CMDLINE_LINUXdirective. After modifying this file, thegrub2-mkconfigcommand must be run to apply changes.
* Option C (Correct):The/boot/loader/entries/directory contains configuration files for each kernel version, which store the boot parameters separately.
* Option B (Incorrect):Boot parameters specified at the GRUB command line are not persistent across reboots unless added to the configuration file.
* Option D (Incorrect):Parameters set from the GRUB menu are temporary and do not apply to subsequent reboots.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Configuring GRUB2

質問 # 55
Which two statements are true about fdisk?

• A. It can partition disks larger than 2 TB by using a GPT partition table.
• B. It can divide logical devices into one or more block disks called partitions.
• C. It cannot partition disks larger than 2 TB by using a GPT partition table.
• D. fdisk -l displays disk size information for all disks.
• E. It understands GPT, MBR, and HFS partition tables.

正解：A、D

質問 # 56
Which two commands relabel an SELinux system after a reboot?

• A. Set kernel parameter selinux=0
• B. fixfiles -F relabel
• C. echo "relabel=1" > /.selinux
• D. touch /.autorelabel
• E. fixfiles -F onboot
• F. Set kernel parameter autorelabel=0

正解：D、E

解説：
* Option D (Correct):Creating an empty file named.autorelabelin the root directory tells SELinux to relabel the entire file system during the next reboot.
* Option F (Correct):Thefixfiles -F onbootcommand schedules a full file system relabel on the next reboot.
* Option A, B, C, E (Incorrect):These options do not correctly set the system to relabel on reboot.
Oracle Linux Reference:Refer to:
* OracleLinux 8: SELinux Guide

質問 # 57
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