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NEW QUESTION # 22
Which command produces human-readable timestamps in kernel ring buffer messages?
- A. dmesg -W
- B. dmesg -t
- C. dmesg -T
- D. dmesg -x
Answer: C
NEW QUESTION # 23
Which are three of the network bonding modes supported in Oracle Linux 8?
- A. Passive Backup
- B. Active Backup
- C. Split Horizon
- D. Multicast
- E. 802.3ad
- F. Round-robin
- G. Poison Reverse
Answer: B,E,F
Explanation:
* 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
NEW QUESTION # 24
Which two statements are true about the configuration and use of cron or anacron?
- A. anacron jobs may run only once a day.
- B. The crond daemon looks for jobs only in /etc/crontab.
- C. All crontabs are held in the /etc/cron.d directory.
- D. cron jobs may run only once a minute.
- E. anacron jobs are used to run cron jobs if the system was powered off when they were scheduled to run.
Answer: A,E
NEW QUESTION # 25
You must add an additional swap device and you add this entry to /etc/fstab:
/.swapfile none swap defaults 0 0
Examine these commands and output:
# dd if=/dev/zero of=/.swapfile bs=1024 count=1048576
1048576+0 records in
1048576+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 4.32499 s, 248 MB/s
# swapon -a
swapon: /.swapfile: insecure permissions 0644, 0600 suggested.
swapon: /.swapfile: read swap header failed
Which two actions must you perform to add this swap device?
- A. Use a physical disk partition type of 82 (Linux swap).
- B. Change defaults to user in the /etc/fstab entry.
- C. Execute swapon -L swapfile /.swapfile after adding a label.
- D. Initialize the .swapfile file by using the mkswap command.
- E. Assign a label to the .swapfile file by using the swaplabel command.
- F. Execute swapon -all.
Answer: B,D
NEW QUESTION # 26
Which two statements are true about the Oracle Linux 8 boot process?
- A. The bootloader loads the initramfs file into memory and extracts the vmlinuz file into a temporary file system (tmpfs).
- B. The bootloader loads the initramfs file into memory and extracts the vmlinuz file into the /boot file system.
- C. Both the vmlinuz file and the initramfs file are located in the /boot directory.
- D. The kernel loads driver modules from initramfs that are required to access the root file system.
- E. The kernel loads driver modules from vmlinuz that are required to access the root file system.
Answer: A,D
NEW QUESTION # 27
Which two statements are true about kernel boot parameters?
- A. Boot parameters defined as values for the GRUB_BOOT command-line interface are persistent and apply to all subsequent reboots.
- B. Parameters passed to the kernel from the GRUB 2 menu are persistent and apply to all subsequent reboots.
- C. Boot parameters are defined as values for the GRUB_CMDLINE_LINUX directive in the /etc/default
/grub file. - D. Each kernel version's boot parameters are stored in independent configuration files in/boot/loader
/entries.
Answer: C,D
Explanation:
* 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
NEW QUESTION # 28
Which two statements are true about the Oracle Linux 8 boot process?
- A. The bootloader loads the initramfs file into memory and extracts the vmlinuz file into the /boot file system.
- B. The kernel loads driver modules from initramfs that are required to access the root file system.
- C. The kernel loads driver modules from vmlinuz that are required to access the root file system.
- D. The bootloader loads the initramfs file into memory and extracts the vmlinuz file into a temporary file system (tmpfs).
- E. Both the vmlinuz file and the initramfs file are located in the /boot directory.
Answer: B,E
Explanation:
Explanation of Answer D:Theinitramfs(initial RAM filesystem) is a temporary filesystem loaded into memory during the boot process, containing essential drivers and utilities. The kernel usesinitramfsto load necessary drivers and modules required to access the root file system, particularly if it resides on a disk that requires special drivers.
Explanation of Answer E:Both thevmlinuz(the compressed Linux kernel image) and theinitramfsfile are located in the/bootdirectory. The bootloader, such as GRUB, reads these files from/bootto start the system.
NEW QUESTION # 29
Examine the contents of the /etc/exports file on an NFS server:
/status *(rw,async)
/usr/shared/tools *(all-squash,anonuid=501,anongid=501,ro)
/projects/big *(ro) pteam(rw)
The NFS server exports /usr/shared/tools to NFS clients. Which statement is true?
- A. All clients except those with a local 501 user can mount /usr/shared/tools read-only.
- B. All clients can mount /usr/shared/tools read-only and NFS explicitly maps all requests to the UID and GID of the privileged local 501 user.
- C. All clients can mount /usr/shared/tools read-only and all-squash overrides explicit mapping of the UID and GID defined by anonuid and anongid.
- D. All clients can mount /usr/shared/tools read-only and NFS explicitly maps all requests to the UID and GID of the unprivileged local 501 user.
- E. All clients can mount /usr/shared/tools read-only and NFS ignores the directives defined by the anonuid and anongid options.
Answer: D
Explanation:
* Option C (Correct):Theall-squashoption in the/etc/exportsfile maps all user and group requests from remote systems to the anonymous user (nfsnobody) on the NFS server. However, because theanonuidandanongidoptions are specified with501, all incoming requests are explicitly mapped to the UID and GID of the unprivileged local user with UID 501 and GID 501. Thero(read-only) option allows all clients to mount/usr/shared/toolsas read-only.
* Option A (Incorrect):This is incorrect because all clients can mount the directory, but all users' requests are squashed to UID 501. There is no exception for local 501 users.
* Option B (Incorrect):The answer is incorrect because it incorrectly states "privileged local 501 user." The UID 501 is typically an unprivileged user.
* Option D (Incorrect):Theall-squashoption does not override the UID and GID explicitly defined byanonuidandanongid. Instead, it maps all remote requests to these values.
* Option E (Incorrect):Theanonuidandanongiddirectives are not ignored; they are explicitly used to map all requests to the specified UID and GID.
Oracle Linux Reference:For more information on NFS exports and options, refer to:
* OracleLinux 8: Managing NFS and NIS
* man exportsfor details on export options.
NEW QUESTION # 30
Examine these commands and output:
# cat /etc/auto.master
/net -hosts
/- auto.direct ro
# cat /etc/auto.direct
/nfs1 host01:/export/share1
/nfs2 -sync host01:/export/share2
/nfs3 host02:/export/share3
Automounter must be used to mount these filesystems. Which mount options will it use?
- A. /nfs1 and /nfs3 are mounted read-only, async while /nfs2 is mounted read-only, sync.
- B. All three filesystems are mounted read-only, sync.
- C. /nfs1 and /nfs3 are mounted read-only, async while /nfs2 is mounted read-write, sync.
- D. All three filesystems are mounted read-write, sync.
- E. All three filesystems are mounted read-only, async.
Answer: A
NEW QUESTION # 31
Examine these commands, which execute successfully:
# firewall-cmd --zone=public --add-service=cockpit --permanent
# firewall-cmd --zone=public --add-port=1313/tcp --permanent
# firewall-cmd --reload
Which are true upon execution?
- A. The custom Cockpit service configuration file is updated in /usr/lib/firewalld/services.
- B. The Cockpit service is added only to the public zone.
- C. Runtime firewall configuration is not lost when the firewalld process is restarted or the system is rebooted.
- D. Egress traffic is allowed for the Cockpit service only when using port 1313.
- E. Port 1313 blocks all traffic for the public zone except for ingress traffic to the Cockpit service.
Answer: B,C
NEW QUESTION # 32
Which two statements are true about control groups (cgroups) in Oracle Linux 8?
- A. Oracle Linux 8 implements cgroups v2 by default.
- B. Cgroups allow processes to be organized into hierarchical groups whose resource usage cannot be limited and monitored.
- C. A cgroup is a collection of processes bound to a set of limits or parameters defined in the cgroups filesystem.
- D. Different controllers from cgroups version 1 and cgroups version 2 cannot be used at the same time.
- E. The cgroups filesystem allows limits to be overwritten in the lower levels of the hierarchy.
Answer: A,C
Explanation:
Explanation of Answer A:Oracle Linux 8 uses cgroups version 2 (cgroups v2) by default. cgroups v2 is a unified hierarchy system that introduces improvements over version 1, including a simplified interface and better resource management capabilities.
Explanation of Answer B:A control group (cgroup) is a mechanism for grouping processes and setting limits or parameters on their resource usage, such as CPU, memory, or I/O. These limits and parameters are configured and managed through the cgroups filesystem.
NEW QUESTION # 33
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. LISTEN 0 511 *:80 *:* cubic cwnd:10
- C. tcp CLOSE-WAIT 32 0 server.example.com:44732 12.21.0.15:https
- 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: B,E
NEW QUESTION # 34
Which are three of the network bonding modes supported in Oracle Linux 8?
- A. Passive Backup
- B. Active Backup
- C. Split Horizon
- D. Multicast
- E. 802.3ad
- F. Round-robin
- G. Poison Reverse
Answer: B,E,F
NEW QUESTION # 35
Which three statements are true about the journalctl command?
- A. journalctl -k shows kernel logs 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 notice..warning shows all messages from notice to warning log level since the last boot.
- E. journalctl -p 6 shows all info log level messages and above.
Answer: A,B,E
NEW QUESTION # 36
Which three statements are true about DNF modules?
- A. Profiles are used to provide alternate versions of the same module.
- B. Switching an enabled module stream automatically changes installed packages.
- C. Streams are used to define optional configurations of modules.
- D. Streams cannot declare dependencies on the streams of other modules.
- E. Packages exist in multiple streams, where each stream contains a different version.
- F. Installing a module allows a user to select a specific stream.
- G. Modules are a group of packages that are installed together along with dependencies.
Answer: E,F,G
NEW QUESTION # 37
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. fdisk -l displays disk size information for all disks.
- D. It cannot partition disks larger than 2 TB by using a GPT partition table.
- E. It understands GPT, MBR, and HFS partition tables.
Answer: C,D
Explanation:
* 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.
NEW QUESTION # 38
Examine these requirements for a host with a user oracle:
Network services must run in a confined domain.
The oracle user must be confined.
The oracle user must be able to use Mozilla Firefox.
Access to files and directories must be granted based only on SELinux contexts.
The SELinux configuration must be persistent across system restarts.
Users must be able to publish private HTML content.
Now examine these commands and output:
# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: permissive
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max Kernel policy version: 31
# setenforce enforcing
# semanage login -a -s guest_u oracle
# setsebool -P http_enable_homedirs on
Which requirements are satisfied?
- A. 1, 2, 4, 5, 6
- B. 1, 2, 3, 5, 6
- C. 1, 2, 4, 6
- D. 1, 2, 3, 6
- E. 1, 2, 6
- F. 1, 2, 3, 4, 5, 6
Answer: A
NEW QUESTION # 39
Which two statements are true about systemd system and service manager?
- A. systemd is the first process that starts after the system boots and is the final process left running before the system shuts down.
- B. systemd is backward-compatible with the System V init scripts that were used in earlier versions of Oracle Linux.
- C. The service command is used to start and stop system service units.
- D. systemd service units expose kernel devices and can be used to implement device-based activation.
- E. systemd reads /etc/system to determine which services to start.
Answer: A,D
NEW QUESTION # 40
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. Both at and batch read from standard input, or you can specify a file and execute the commands with the -f option.
- C. batch schedules the execution of recurring tasks.
- D. at schedules the execution of recurring tasks.
- E. at executes a one-time task to run at a specific time.
Answer: B,E
NEW QUESTION # 41
Which takes precedence for ssh program configuration?
- A. ~/.ssh/config
- B. /etc/ssh/sshd_config
- C. Command line
- D. /etc/ssh/ssh_config
Answer: C
Explanation:
Explanation of Answer C:When configuring SSH, the command-line options take the highest precedence.
Any configuration specified directly on the command line will override settings in user-specific (~/.ssh
/config) or system-wide configuration files (/etc/ssh/ssh_config).
NEW QUESTION # 42
Examine this command:
# cryptsetup luksOpen /dev/xvdd1 cryptfs
What happens upon execution?
- A. It creates the /dev/mapper/cryptfs device mapping file.
- B. It creates the /dev/mapper/xvdd1 device mapping file.
- C. It creates the LUKS partition on /dev/xvdd1.
- D. It creates the /dev/mapper/xvdd1-cryptfs device mapping file.
- E. It creates the /dev/mapper/xvdd1/cryptfs device mapping file.
Answer: A
Explanation:
The commandcryptsetup luksOpen /dev/xvdd1 cryptfsis used to open an encrypted LUKS partition. This command maps the encrypted block device/dev/xvdd1to a decrypted block device that is accessible under/dev
/mapper/cryptfs.
* Option A (Correct):This is correct because thecryptsetup luksOpencommand creates a device mapping under/dev/mapper/with the name specified (cryptfsin this case). This mapping allows you to access the encrypted content of/dev/xvdd1through the decrypted virtual device/dev/mapper/cryptfs.
* Options B, C, D, E (Incorrect):These options are incorrect because they do not accurately reflect the standard behavior of thecryptsetup luksOpencommand. The device created will always be in the format
/dev/mapper/<name>where<name>is the alias specified in the command.
Oracle Linux Reference:For more information, refer to:
* OracleLinux 8: Managing Storage Devices
* man cryptsetupfor more details on theluksOpencommand and LUKS management.
NEW QUESTION # 43
Examine this command:
# ssh -L 5011:127.0.0.1:80 [email protected] -f sleep 30
Which two are true upon execution?
- A. A local port forward is created between client and server.
- B. A socket remains open for 30 minutes unless a connection is established.
- C. A web server is listening on port 5011.
- D. A reverse tunnel is created back to the local host on port 80.
- E. An SSH connection process is forked to the background.
Answer: A,E
NEW QUESTION # 44
Examine this command:
# useradd -m -s /bin/bash alice
Which statement is true about the account?
- A. It is not assigned a home directory.
- B. It is assigned a shell but without a password.
- C. It is assigned a home directory and a password.
- D. It is a member of the wheel group.
Answer: B
Explanation:
* Option B (Correct):Theuseraddcommand with-mcreates a home directory for the user, and the-s /bin
/bashoption assigns the Bash shell. However, no password is set when the user is created withuseraddunless explicitly done with thepasswdcommand afterward.
* Option A (Incorrect):There is no mention of adding the user to thewheelgroup; theuseraddcommand does not imply this.
* Option C (Incorrect):The command does not automatically set a password; it only creates the user account with the specified shell.
* Option D (Incorrect):The-moption ensures that a home directory is created.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Managing Users and Groups
NEW QUESTION # 45
Examine this command and output:
# cat deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
selector:
matchLabels:
app: nginx
replicas: 2
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.14.2
ports:
- containerPort: 80
Now examine this command which executes successfully:
$ kubectl create -f deployment.yaml
Which two statements are true?
- A. The command specifies nginx image version 1.14.2 and will fail if the image version is not available.
- B. The command specifies port 80 as the port that the container exposes.
- C. The command creates and guarantees the availability of a specified number of identical pods.
- D. The command creates a deployment named nginx.
- E. The command creates a pod named nginx.
Answer: B,C
NEW QUESTION # 46
......
Oracle 1Z0-106 exam includes questions on several key topics, including Linux system management, storage management, network configuration, security management, and system monitoring. Oracle Linux 8 Advanced System Administration certification exam validates the knowledge and skills of IT professionals in managing and maintaining the Oracle Linux 8 operating system in enterprise environments. Successful completion of the exam demonstrates the ability to perform advanced system administration tasks in a Linux environment and positions IT professionals to lead enterprise IT teams in managing and troubleshooting Oracle Linux 8 systems.
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