QUESTION: 149

A technician is working on a Linux server. The customer has reported that files in the home directory are missing. The /etc/ f stab file has the following entry:
nfsserver:/home /home nfs defaults 0 0
However, a df -h /home command returns the following information:
/dev/sda2 10G 1G 9G 10% /home
Which of the following should the technician attempt FIRST to resolve the issue?

mkdir /home
umount nfsserver:/home
rmdir nfsserver:/home/dev/sda2
mount /home

Answer(s): B

Explanation:

The /etc/fstab file contains the information about the file systems that are mounted automatically at boot time or on demand. The entry nfsserver:/home /home nfs defaults 0 0 indicates that the /home directory on the local server is mounted from the /home directory on a remote server called nfsserver using the NFS protocol. However, the df -h /home command shows that the /home directory is actually mounted from a local partition /dev/sda2, which may not contain the user's files. This means that the NFS mount failed or was overridden by another mount. To resolve the issue, the technician should attempt to unmount the local partition using umount nfsserver:/home, which will detach the /home directory from /dev/sda. Then, the technician should try to mount the NFS share again using mount /home, which will attach the /home directory to nfsserver:/home according to the /etc/fstab entry. Creating a new directory (A) or removing an existing one © would not help, as they would not affect the mount point. Mounting /home (D) without unmounting it first would not work, as it would result in an error that the mount point is busy.

Reference:

1 https://askubuntu.com/questions/374870/home-directory-not-being- created 2 https://www.techrepublic.com/article/how-to-properly-automount-a-drive-in-ubuntu- linux/ 3 https://serverfault.com/questions/587855/cannot-find-home-directory-on-linux-server

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QUESTION: 150

A server room with many racks of servers is managed remotely with occasional on-site support.
Which of the following would be the MOST cost-effective option to administer and troubleshoot network problems locally on the servers?

Management port
Crash cart
IP KVM
KVM

Answer(s): C

Explanation:

An IP KVM (keyboard, video, mouse) is a device that allows remote access and control of multiple servers over a network using a web browser or a client software. An IP KVM is a cost-effective option to administer and troubleshoot network problems locally on the servers, as it eliminates the need for physical presence or dedicated hardware for each server. A management port (A) is a network interface that is used for out-of-band management of network devices, such as routers or switches. A management port does not provide local access to servers. A crash cart (B) is a mobile unit that contains a monitor, keyboard, mouse, and other tools for troubleshooting servers in a data center. A crash cart requires physical access to each server and may not be cost-effective for many racks of servers. A KVM (D) is a device that allows switching between multiple servers using a single keyboard, video, and mouse. A KVM does not provide remote access over a network and requires physical connection to each server.

Reference:

https://www.enterprisestorageforum.com/management/best-data-storage-solutions-and-software- 2021/ https://www.microsoft.com/en-us/microsoft-365/business-insights-ideas/resources/cloud- storage-vs-on-premises-servers

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QUESTION: 151

A systems administrator is investigating a server with a RAID array that will not boot into the OS. The administrator notices all the hard drives are reporting to be offline. The administrator checks the RAID controller and verifies the configuration is correct. The administrator then replaces one of the drives with a known-good drive, but it appears to be unavailable as well. Next, the administrator takes a drive out of the server and places it in a spare server, and the drive is available and functional.
Which of the following is MOST likely causing the issue?

The kernel is corrupt.
Resources are misallocated.
The backplane has failed.
The drives need to be reseated.

Answer(s): C

Explanation:

The backplane is a circuit board that connects multiple hard drives to a RAID controller and provides power and data transfer between them. If the backplane has failed, it may cause all the hard drives to be offline and prevent the server from booting into the OS. The fact that replacing one of the drives with a known-good drive did not work, and that taking a drive out of the server and placing it in a spare server made it functional, suggests that the problem is not with the drives themselves but with the backplane. A corrupt kernel (A) would not affect the status of the hard drives, as it is a software component of the OS. Resource misallocation (B) would not cause all the hard drives to be offline, as it is a configuration issue that affects how resources are assigned to processes or applications. Reseating the drives (D) would not help, as it would not fix a faulty backplane.

Reference:

https://www.dell.com/support/kbdoc/en-us/000130114/how-to-troubleshoot-a-faulty- backplane

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QUESTION: 152

Which of the following can be used to map a network drive to a user profile?

System service
Network service
Login script
Kickstart script

Answer(s): C

Explanation:

A login script is a file that contains commands or instructions that are executed when a user logs into a system or network. A login script can be used to map a network drive to a user profile, which means that the user will have access to a shared folder or resource on another computer or server. A login script can be written in various languages, such as batch, PowerShell, or VBScript, and can be assigned to a user or a group using tools such as Group Policy or Active Directory . A system service (A) is a program that runs in the background and performs tasks that are essential for the operation of the system, such as security, networking, or hardware management. A system service does not map a network drive to a user profile. A network service (B) is a program that provides functionality or resources to other programs or devices over a network, such as file sharing, printing, or web hosting. A network service does not map a network drive to a user profile. A kickstart script (D) is a file that contains configuration settings and commands for automated installation of Linux operating systems. A kickstart script does not map a network drive to a user profile.

Reference:

https://www.howtogeek.com/118452/how-to-map-network-drives-from-the-command-prompt-in- windows/ https://docs.microsoft.com/en-us/windows-server/administration/windows- commands/logon

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