VALID TEST 1Z1-106 FORMAT & NEW 1Z1-106 EXAM CRAM

Valid Test 1z1-106 Format & New 1z1-106 Exam Cram

Valid Test 1z1-106 Format & New 1z1-106 Exam Cram

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Oracle Linux 8 Advanced System Administration Sample Questions (Q14-Q19):

NEW QUESTION # 14
Which two statements are true about naming network interfaces?

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

Answer: B,D

Explanation:
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.


NEW QUESTION # 15
Which two statements are true about removing a physical volume (PV) from a volume group (VG)?

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

Answer: A,E

Explanation:
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.


NEW QUESTION # 16
Examine this command:
# ssh -L 5011:127.0.0.1:80 [email protected] -f sleep 30
Which two are true upon execution?

  • A. An SSH connection process is forked to the background.
  • B. A local port forward is created between client and server.
  • C. A reverse tunnel is created back to the local host on port 80.
  • D. A web server is listening on port 5011.
  • E. A socket remains open for 30 minutes unless a connection is established.

Answer: A,B


NEW QUESTION # 17
Which two statements are true about systemd system and service manager?

  • A. systemd is backward-compatible with the System V init scripts that were used in earlier versions of Oracle Linux.
  • B. systemd is the first process that starts after the system boots and is the final process left running before the system shuts down.
  • 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,B

Explanation:
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.


NEW QUESTION # 18
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
  • B. mdadm -create /dev/md0 -level=5 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev
    /xvdd3
  • C. mdadm -create /dev/md0 -level=1 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev
    /xvdd3
  • D. mdadm -create /dev/md0 -level=0 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare-devices=1 /dev
    /xvdd3

Answer: C

Explanation:
The correct command to create a RAID-1 device (mirroring) consisting of two block volumes with one spare device is optionC:mdadm -create /dev/md0 -level=1 -raid-devices=2 /dev/xvdd1 /dev/xvdd2 -spare- devices=1 /dev/xvdd3.
* RAID Level 1:RAID-1, also known as mirroring, involves creating an exact copy (or mirror) of a set of data on two or more disks. This ensures data redundancy; if one disk fails, the other can still provide the data.
* mdadm Command Structure:Themdadmcommand is used to manage and monitor RAID devices on Linux. To create a new RAID array, the--createoption is used, followed by several parameters:
* /dev/md0: The name of the RAID device to be created.
* --level=1: Specifies RAID level 1 (mirroring).
* --raid-devices=2: Indicates the number of active devices (two in this case) to be used in the RAID array.
* /dev/xvdd1 /dev/xvdd2: The two block devices that will form the RAID-1 array.
* --spare-devices=1 /dev/xvdd3: Specifies one spare device (/dev/xvdd3). A spare device is used to automatically replace a failed device in the RAID array.
* Option Analysis:
* A.Incorrect because it specifies RAID level 5 (--level=5), which requires at least three devices and does not match the requirement for RAID-1.
* B.Incorrect because it does not include the--spare-devices=1option, meaning there is no spare device included in this configuration.
* C.Correct as it specifies RAID-1 (--level=1), two active devices (--raid-devices=2), and one spare device (--spare-devices=1).
* D.Incorrect because it specifies RAID level 0 (--level=0), which is a striped set (no redundancy), not a mirrored set (RAID-1).
Oracle Linux Reference:For more detailed information aboutmdadmand RAID configurations in Oracle Linux
8, refer to the following Oracle Linux documentation:
* OracleLinux 8 Managing Storage Devices - RAID Configuration
* OracleLinux 8 mdadm Manual
These references provide comprehensive details on RAID levels,mdadmcommand syntax, and options for creating and managing RAID arrays in Oracle Linux.


NEW QUESTION # 19
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