XK0-005 practice questions 91–100

1. Question 91 · 300 in bank

   Select 2

   A Linux administrator has physically added a new RAID adapter to a system. Which of the following commands should the Linux administrator run to confirm that the device has been recognized? (Choose two.)

   • Armmod
   • Bls -ll /etc
   • Clshw -class disk
   • Dpvdisplay
   • Ermdir /dev
   • Fdmesg

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   Answer: CF

   Explanation

   lshw -class disk ( option -class shows only a certain class of hardware ) dmesg - diagnostic message; dmesg is a command-line-based utility in Linux that displays kernel-related messages retrieved from the kernel ring buffer. rmmod - simple program to remove a module from the Linux Kernel ls -l. The -l option signifies the long list format. pvdisplay — Display various attributes of physical volume(s) rmdir /dev - Remove directory "dev" in this case

   Source: Adapted from community discussion — Damon54

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2. Question 92 · 300 in bank

   Based on the given command: find /home/user1 -type f -name "*.txt" -size +100M Which of the following will the command accomplish?

   • AIt finds all the files ending with .txt with a size less than 100MB in /home/user1 directory.
   • BIt finds all the files ending with .txt with a size of 100MB in /home/user1 directory.
   • CIt finds all the directories with .txt files with a size of 100MB in /home folder.
   • DIt finds all the files ending with .txt with a size of over 100MB in /home/user1 directory.

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   Answer: D

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3. Question 93 · 300 in bank

   While inspecting a recently compromised Linux system, the administrator identified a number of processes that should not have been running:

   

   Which of the following commands should the administrator use to terminate all of the identified processes?

   • Apkill -9 -f "upload*.sh"
   • Bkill -9 "upload*.sh"
   • Ckillall -9 "upload*.sh"
   • Dskill -9 "upload*.sh"

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   Answer: A

   Explanation

   pkill An alternative command to kill is the pkill command, which also references the process by PID. Additionally, pkill can also terminate processes based on name, users, and other criteria. When -f is set, the full command line is used. (complete command line) The kill command is used to pass these signals to processes. For example, to initiate a graceful exit, type: $ sudo kill -15 {PID} Likewise, kill -9 {PID} sends a SIGKILL message to the process. skill These tools are obsolete and unportable.

   Source: Adapted from community discussion — Damon54

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4. Question 94 · 300 in bank

   A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a repository to share with the systems team. A junior Linux administrator needs to retrieve the scripts and make them available on a local workstation. Which of the following Git commands should the junior Linux administrator use to accomplish this task?

   • Afetch
   • Bcheckout
   • Cclone
   • Dbranch

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   Answer: C

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5. Question 95 · 300 in bank

   Users are reporting that writes on a system configured with SSD drives have been taking longer than expected, but reads do not seem to be affected. A Linux systems administrator is investigating this issue and working on a solution. Which of the following should the administrator do to help solve the issue?

   • ARun the corresponding command to trim the SSD drives.
   • BUse fsck on the filesystem hosted on the SSD drives.
   • CMigrate to high-density SSD drives for increased performance.
   • DReduce the amount of files on the SSD drives.

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   Answer: A

   Explanation

   What is TRIM TRIM is the function that allows you to improve the long-lasting performance of SSDs by better managing the various reads and writes of the cells, so you will not only increase the life of the SSD but also speed up the read and write operations. SSD TRIM is an Advanced Technology Attachment (ATA) command that enables an operating system to inform a NAND flash solid-state drive (SSD) which data blocks it can erase because they are no longer in use. The use of TRIM can improve the performance of writing data to SSDs and contribute to longer SSD life

   Source: Adapted from community discussion — Damon54

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6. Question 96 · 300 in bank

   A Linux engineer needs to block an incoming connection from the IP address 2.2.2.2 to a secure shell server and ensure the originating IP address receives a response that a firewall is blocking the connection. Which of the following commands can be used to accomplish this task?

   • Aiptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j DROP
   • Biptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j RETURN
   • Ciptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j REJECT
   • Diptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j QUEUE

   Show answer

   Answer: C

   Explanation

   In general, use REJECT if you want the other side to know that the port is unreachable, and DROP for connections to hosts you don't want to see.

   Source: Adapted from community discussion — Damon54

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7. Question 97 · 300 in bank

   A user reported issues when trying to log into a Linux server. The following outputs were received:

   

   Given the outputs above, which of the following is the reason the user is unable to log in to the server?

   • AUser1 needs to set a long password.
   • BUser1 is in the incorrect group.
   • CThe user1 shell assignment is incorrect.
   • DThe user1 password is expired.

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   Answer: B

   Explanation

   A The password is set correctly (encrypted password ) C bin/bash shell assignment is correct D password is not expired 18885 : 0 : 99999 : 7 : : : by exclusion I would say B , but Output 4 should be like this AllowGroups wheel admin desktopuser

   Source: Adapted from community discussion — Damon54

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8. Question 98 · 300 in bank

   A systems administrator created a web server for the company and is required to add a tag for the API so end users can connect. Which of the following would the administrator do to complete this requirement?

   • Ahostnamectl status --no-ask-password
   • Bhostnamectl set-hostname "$(perl -le "print" "A" x 86)"
   • Chostnamectl set-hostname Comptia-WebNode -H root@192.168.2.14
   • Dhostnamectl set-hostname Comptia-WebNode --transient

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   Answer: C

   Explanation

   The hostnamectl set-hostname Comptia-WebNode -H root@192.168.2.14 command sets the hostname of a Linux system. Here's what each option does: set-hostname Comptia-WebNode: The set-hostname option sets the hostname of the system to "Comptia-WebNode". -H root@192.168.2.14: The -H option is used to specify the remote host to connect to. In this case, the administrator is connecting to the remote host with the IP address 192.168.2.14 as the root user. This command sets the hostname of the remote host with IP address 192.168.2.14 to "Comptia-WebNode" as the root user. The new hostname will persist across reboots unless the administrator changes it again in the future.

   Source: Adapted from community discussion — linux_admin

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9. Question 99 · 300 in bank

   A junior administrator updated the PostgreSQL service unit file per the database administrator's recommendation. The service has been restarted, but changes have not been applied. Which of the following should the administrator run for the changes to take effect?

   • Asystemctl get-default
   • Bsystemctl daemon-reload
   • Csystemctl enable postgresql
   • Dsystemctl mask postgresql

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   Answer: B

   Explanation

   The “daemon-reload” reloads changes or modifies the systemd unit files. These unit files are placed in the “/etc/systemd/system” directory and require reloading if any changes are made to them.

   Source: Adapted from community discussion — Damon54

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10. Question 100 · 300 in bank

    A systems administrator intends to use a UUID to mount a new partition permanently on a Linux system. Which of the following commands can the administrator run to obtain information about the UUIDs of all disks attached to a Linux system?

    • Afcstat
    • Bblkid
    • Cdmsetup
    • Dlescsi

    Show answer

    Answer: B

    Explanation

    blkid is a command-line utility in Linux that is used to display information about block devices, such as hard drives, solid-state drives (SSDs), or removable storage devices, such as USB drives. blkid can be used to display a variety of information about a block device, including its device name, type, UUID (Universally Unique Identifier), filesystem, and label. https://www.thegeekdiary.com/blkid-command-examples-in-linux/

    Source: Adapted from community discussion — rhtech

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XK0-005 practice, question 91. 300 questions available.