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Linux+ Practice Quiz Scorecard

Not even doing a subtitle for this one; you already know (XK0-004)

I took this one (if you're signed in a different one appears!):

https://www.itexams.com/exam/XK0-004

Here are my answers for this sample and how I responded to getting things right or wrong:

  1. In order to comply with new security policies, an administrator needs to prevent the SSH server from using insecure algorithms. Which of the following files should be edited to accomplish this?

    A. /etc/ssh/sshd_config
    B. /etc/ssh/ssh_config
    C. ~/.ssh/ssh_config
    D. /etc/ssh/known_hosts

    A, easy. I've had to set up X11 forwarding before. CORRECT

  2. Which of the following configuration files should be modified to disable Ctrl+Alt+Del in Linux?

    A. /etc/inittab
    B. ~/.bash_profile
    C. /etc/securetty
    D. /etc/security/limits.conf

    A isn't really for security. B would be obviously insecure. C has that nice Unix-y sound to it so I guessed that one. WRONG

  3. Joe, a user, is unable to log in to the server and contracts the systems administrator to look into the issue. The administrator examines the /etc/passwd file and discovers the following entry: joe:x:505:505::/home/joe:/bin/false Which of the following commands should the administrator execute to resolve the problem?

    A. usermod -s /bin/bash joe
    B. passwd -u joe
    C. useradd -s /bin/bash joe
    D. chage -E -1 joe

    /bin/false is there to troll the user or, at least, to prevent unauthorized access. usermod is our pal here. CORRECT

  4. A server is almost out of free memory and is becoming unresponsive. Which of the following sets of commands will BEST mitigate the issue?

    A. free, fack, partprobe
    B. lsof, lvcreate, mdadm
    C. df, du, rmmod
    D. fdisk, mkswap, swapon -a

    You have a server slowing to a crawl and you create a swap partition. Now you have two problems! D it is! CORRECT

  5. A Linux administrator is using a public cloud provider to host servers for a company's website. Using the provider's tools, the administrator wrote a JSON file to define how to deploy the servers. Which of the following techniques did the administrator use?

    A. Infrastructure as code
    B. Build automation
    C. Platform as a service
    D. Automated configuration

    I don't know too much about DevOps but since "infrastructure" and "code" were mentioned I'm going with "infrastructure as code". WRONG

  6. A Linux system is running normally when the systems administrator receives an alert that one application spawned many processes. The application is consuming a lot of memory, and it will soon cause the machine to become unresponsive. Which of the following commands will stop each application process?

    A. kill `pidof application`
    B. killall application
    C. kill -9 `ps -aux | grep application`
    D. pkill -9 application

    I've used B too many times to count. Getting the Markdown right for this one was a lot harder. CORRECT

  7. A systems administrator configured a new kernel module, but it stopped working after reboot. Which of the following will allow the systems administrator to check for module problems during server startup?

    A. lsmod
    B. modprobe
    C. modinfo
    D. dmesg

    It's a kernel bug matter so I'm guessing dmesg. WRONG

  8. A junior Linux administrator is installing patches using YUM. The administrator issues the following command: yum list installed. The output of the command is as follows:

    Given this scenario and the output, which of the following should the administrator do to address this issue?

    A. renice -n 9 -p 5180
    B. killall yum
    C. ps -ef | grep yum
    D. top | grep yum

    First thing to do is find the offending process. C. CORRECT

  9. A systems administrator needs to retrieve specific fields from a CSV file. Which of the following tools would accomplish this task?

    A. awk
    B. sort
    C. print
    D. echo

    I only ever use Ruby (and sometimes sed) for this sort of CLI text-mongling but it's obviously A. CORRECT

  10. Two specific users need access to a directory owned by root where backups are located. Which of the following commands would BEST ensure the specified users can access the backup files?

    A. umask
    B. chcon
    C. chmod
    D. setfacl

    You've got to be kidding me! C! WRONG Apparently I need to read this later! https://www.redhat.com/sysadmin/linux-access-control-lists

  11. Which of the following is the purpose of the monitoring server role?

    A. To aggregate web traffic to watch which websites employees are visiting B. To collect status and performance information about the servers in an environment C. To provide user authentication services to a network D. To provide real-time analysis of potential threats to the organization

    Obviously B and at least my certainty didn't steer me wrong this time. CORRECT

  12. A junior administrator is migrating a virtual machine from a Type 1 hypervisor to a Type 2 hypervisor. To ensure portability, which of the following formats should the administrator export from the Type 1 hypervisor to ensure compatibility?

    A. OWASP B. VDI C. VMDK D. OVA

    I haven't used VMs much but I took a wild guess that was D. CORRECT

  13. A junior systems administrator is upgrading a package that was installed on a Red Hat-based system. The administrator is tasked with the following:

    • Update and install the new package.
    • Verify the new package version is installed.

    Which of the following should be done to BEST accomplish these task? (Choose two.)

    A. yum install <package name>
    B. yum upgrade
    C. rpm -e <package name>
    D. rpm -qa
    E. apt-get <package name>
    F. apt-get upgrade

    Haven't used RH or the like very much in the past years at all (except for that one Droplet) but it's A and D assuredly. CORRECT

  14. Which of the following is the template for the grub.cfg file?

    A. /etc/default/grub
    B. /etc/grub2.cfg
    C. /etc/sysct1.conf
    D. /boot/efi

    I know just enough to answer A. CORRECT

  15. A Linux administrator implemented a new HTTP server using the default configuration. None of the users on the network can access the server. If there is no problem on the network or with the users' workstations, which of the following steps will BEST analyze and resolve the issue?

    A. Run netstat to ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and 443 B. Run route to ensure the port is correctly bound, and configure the firewall to allow access on ports 80 and 443 C. Run netcat to ensure the port is correctly bound, and configure a static route to the web to allow access on ports 80 and 443 D. Run route to ensure the port is correctly bound, and configure SELinux to allow access on ports 80 and 443

    I think nmap is better for port scanning but C is the only option here. CORRECT

I was thinking about doing something a bit more extensive but haven't made up my mind yet.