Troubleshooting Practice Questions: Other Operating Systems

1. A system administrator needs to install software on an Ubuntu 20.04 LTS workstation but receives a "Permission denied" error when attempting to run the installation script. The administrator is logged in as a standard user account. Which command should the administrator use FIRST to gain the necessary privileges?
(a) sudo
(b) chmod
(c) su
(d) chown

2. Which macOS utility would be BEST for creating a full disk backup that includes the operating system, applications, and all user data?
(a) Disk Utility
(b) Migration Assistant
(c) Time Machine
(d) Carbon Copy Cloner

3. A developer is working on a Linux server running CentOS 8 and needs to determine which processes are consuming the most CPU resources. The server has been experiencing performance degradation during peak hours. Which command should the developer use to view real-time process information sorted by CPU usage?
(a) ps aux
(b) df -h
(c) top
(d) netstat -a

4. A technician is troubleshooting a macOS Monterey system where the user reports that applications are running extremely slowly. After checking Activity Monitor, the technician notices that the "kernel_task" process is using an unusually high amount of CPU. What is the MOST likely cause of this behavior?
(a) A failing solid-state drive
(b) Thermal throttling due to overheating
(c) Insufficient RAM installed
(d) A corrupted user profile

5. Which Linux command is used to change the permissions of a file to make it executable?
(a) chgrp
(b) chown
(c) chmod
(d) chroot

6. An IT technician needs to remotely access a Linux server's command line interface from a Windows workstation. The connection must be encrypted to meet company security policies. Which protocol should the technician use?
(a) Telnet
(b) SSH
(c) FTP
(d) RDP

7. A user reports that their MacBook Pro running macOS Big Sur is experiencing frequent application crashes and system freezes. The technician suspects corrupted system files. Which built-in macOS utility should be run FIRST from macOS Recovery to check and repair disk permissions and file system errors?
(a) Terminal with fsck command
(b) First Aid in Disk Utility
(c) System Preferences Reset
(d) Safe Mode boot

8. A network administrator working on Ubuntu Server 22.04 needs to view the current network configuration including IP addresses, subnet masks, and active network interfaces. Which command provides this information in the current systemd-based distributions?
(a) ifconfig
(b) ipconfig
(c) ip addr
(d) netstat

9. A graphic designer using macOS Ventura complains that an application downloaded from the internet won't open and displays a message stating "cannot be opened because it is from an unidentified developer." The application is from a trusted source but isn't signed with an Apple Developer ID. What should the technician advise the user to do to open the application?
(a) Disable FileVault encryption
(b) Right-click the app and select "Open" from the context menu
(c) Reset the NVRAM/PRAM
(d) Reinstall macOS

10. A Linux system administrator needs to search for all files with the .log extension in the /var directory and its subdirectories on a Debian 11 server. Which command should be used?
(a) grep -r "*.log" /var
(b) locate /var/*.log
(c) find /var -name "*.log"
(d) ls -R /var | grep .log

11. Which file system is the default format used by macOS Monterey and later versions for internal drives?
(a) HFS+
(b) APFS
(c) exFAT
(d) ext4

12. A technician is configuring a new Ubuntu 22.04 workstation and needs to install multiple software packages. The user receives an error stating "Unable to locate package" when running the installation command. The system was just installed yesterday and has internet connectivity. What should the technician do FIRST?
(a) Reinstall Ubuntu completely
(b) Run sudo apt update to refresh package lists
(c) Download packages manually from websites
(d) Switch to a different package manager

13. A support technician receives a call from a macOS user who accidentally deleted an important document from their Desktop two days ago. The user has Time Machine configured with backups to an external drive. What is the BEST method to restore this specific file?
(a) Restore the entire system from the most recent backup
(b) Navigate to the Desktop folder and use "Enter Time Machine" to browse backups
(c) Use Disk Utility to recover deleted files
(d) Use Terminal with the undelete command

14. An administrator managing a Red Hat Enterprise Linux 8 server needs to view the last 50 lines of the system log file in real-time to troubleshoot a service that keeps crashing. Which command combination would be MOST appropriate?
(a) cat /var/log/messages
(b) head -n 50 /var/log/messages
(c) tail -f -n 50 /var/log/messages
(d) more /var/log/messages

15. A company is deploying new iMacs running macOS Ventura and needs to prevent users from installing unauthorized applications. The IT department wants to allow only applications from the App Store and identified developers. Which macOS security feature should be configured in System Settings?
(a) FileVault
(b) Firewall
(c) Gatekeeper
(d) XProtect

16. A Linux administrator needs to change ownership of the directory /home/projectfiles and all its contents to user "jsmith" and group "developers" on an Ubuntu server. The directory contains multiple subdirectories with various files. Which command accomplishes this task?
(a) chmod -R jsmith:developers /home/projectfiles
(b) chown -R jsmith:developers /home/projectfiles
(c) chgrp -R jsmith:developers /home/projectfiles
(d) usermod -R jsmith:developers /home/projectfiles

17. A user reports that their MacBook Air running macOS Monterey won't boot past the Apple logo and progress bar. The technician successfully boots the system into macOS Recovery by holding Command+R during startup. After running First Aid with no errors found, what should the technician try NEXT?
(a) Immediately reinstall macOS
(b) Boot into Safe Mode by holding the Shift key
(c) Replace the internal SSD
(d) Reset SMC and NVRAM

18. Which Linux command displays the manual pages and detailed documentation for other commands?
(a) help
(b) info
(c) man
(d) docs

19. A technician is setting up a new Mac mini for a video editor who needs to work with large media files stored on an external drive that will also be used with Windows workstations. The drive needs to support files larger than 4GB and be readable by both macOS and Windows 10/11. Which file system should the technician use when formatting the external drive?
(a) NTFS
(b) HFS+
(c) APFS
(d) exFAT

20. A system administrator on a Fedora 37 Linux workstation needs to terminate a process that has become unresponsive and is not closing normally. The administrator has identified the Process ID (PID) as 3847 using the top command. Which command should be used to forcefully terminate this specific process?
(a) kill 3847
(b) stop 3847
(c) end 3847
(d) terminate -p 3847