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CompTIA Server+ Certification Exam 認定 SK0-005 試験問題 (Q273-Q278):
質問 # 273
A systems administrator needs to back up changes made to a data store on a daily basis during a short time frame. The administrator wants to maximize RTO when restoring dat a. Which of the following backup methodologies would best fit this scenario?
- A. ifferential backups
- B. Off-site backups
- C. Incremental backups
- D. Full backups
正解：C
解説：
An incremental backup is a backup method that only backs up the files that have changed since the last backup, whether it was a full or an incremental backup. An incremental backup can save disk space and time, as it only copies the new or modified data. An incremental backup can also improve the RTO (Recovery Time Objective), which is the maximum acceptable time to restore data after a disaster. This is because an incremental backup can restore data faster than a full or a differential backup, as it only needs to apply the latest changes to the previous backup1.
質問 # 274
A user logs in to a Linux server and attempts to run the following command:
sudo emacs /root/file
However the user gets the following message:
User userid is not allowed to execute Temacs' on this server. Which of the following would BEST allow the user to find out which commands can be used?
- A. sudo -1 -U userid
- B. visudo I grep userid
- C. userlist I grep userid
- D. cat /etc/passwd
正解：A
解説：
Explanation
This is the best command to find out which commands can be used by a user with sudo privileges because it lists the allowed and forbidden commands for a given user or role. The -l option stands for list, and the -U option specifies the user name. The output of this command will show what commands can be executed with sudo by that user on that server. References: https://www.sudo.ws/man/1.8.13/sudo.man.html
質問 # 275
A Linux server was recently updated. Now, the server stops during the boot process with a blank screen and an f prompt. Which of the following is the most likely cause of this issue?
- A. The BIOS firmware needs to be upgraded.
- B. The BIOS could not find a bootable hard disk.
- C. The system is booting to a USB flash drive.
- D. The UEFI boot was interrupted by a missing Linux boot file.
正解：D
解説：
Explanation
The most likely cause of this issue is that the UEFI boot was interrupted by a missing Linux boot file. UEFI (Unified Extensible Firmware Interface) is a standard that defines the interface and functionality of the firmware that initializes the hardware and software components of a system before loading the operating system. UEFI boot is a process that uses UEFI firmware to load and execute a boot loader, which is a program that loads the operating system kernel and other essential files. A Linux boot file is a file that contains information and instructions for the boot loader, such as the location of the kernel, the root file system, and the boot parameters. If a Linux boot file is missing or corrupted, the boot loader cannot find or load the kernel, and the system stops during the boot process with a blank screen and an f prompt.
References: CompTIA Server+ SK0-005 Certification Study Guide, Chapter 4, Lesson 4.1, Objective 4.1
質問 # 276
Users ate experiencing issues when trying to access resources on multiple servers. The servers are virtual and run on an ESX server. A systems administrator is investigating but is unable to connect to any of the virtual servers. When the administrator connects to the host, a purple screen with while letters appears. Which of the following troubleshooting steps should the administrator perform FIRST?
- A. Check the power supplies
- B. Review the log files.
- C. Reseat the processors.
- D. Reinstall the ESX server.
正解：B
解説：
Explanation
A purple screen with white letters on an ESX server indicates a kernel panic, which is a fatal error that causes the system to crash and stop functioning3. The first troubleshooting step that an administrator should perform is to review the log files, which may contain information about the cause of the error, such as hardware failures, software bugs, or configuration issues4. Checking the power supplies (A) may not be relevant, as the system is still displaying a screen. Reinstalling the ESX server or reseating the processors (D) are drastic measures that may result in data loss or further damage, and should only be attempted after ruling out other possible causes. References: 3 https://kb.vmware.com/s/article/1014508 4
https://www.altaro.com/vmware/vmware-esxi-purple-screen-death/
質問 # 277
A data center has 4U rack servers that needto be replaced using VMsbutwithout losingany data.
Whichofthefollowingmethodswill MOST likelybe used to replace these servers?
- A. VM cloning
- B. P2V
- C. Unattended scripted OS installation
正解：A
解説：
Explanation
P2V (Physical to Virtual) is a method of converting a physical server into a virtual machine that can run on a hypervisor. This method can be used to replace 4U rack servers with VMs without losing any data, as it preserves the configuration and state of the original server. P2V can also reduce hardware costs, power consumption, and space requirements. Verified References: [What is P2V?]
質問 # 278
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