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In Linux, which command is used to change the ownership of a file?
Operating Systems: File system permissions
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In Linux, which command is used to change the ownership of a file?
chown
chmod
chgrp
usermod
Correct answer
chown
chown changes the owner and group of a file. chmod changes permissions, chgrp changes group only, usermod modifies user account settings.
A user reports multiple browser redirects and pop-ups. Which step should be taken first in malware removal?
Enable System Restore
Disconnect from the network
Run a full antivirus scan
Boot into Safe Mode
Correct answer
Disconnect from the network
Disconnecting from the network prevents data exfiltration and further spread. After isolation, boot into Safe Mode and run scans. System Restore may remove malware but is not the first step.
A Windows system fails to boot with 'Bootmgr is missing' after a disk repartition. Which recovery tool should be used?
Startup Repair
System Restore
Command Prompt with bootrec commands
Reset this PC
Correct answer
Command Prompt with bootrec commands
The bootrec command (bootrec /fixmbr and /rebuildbcd) directly repairs the boot configuration. Startup Repair might work, but bootrec is more targeted for missing bootmgr. System Restore and Reset this PC are broader tools.
A company performs a full backup on Sunday and incremental backups every other day. On Thursday, the drive fails. Which backups are required to restore the data?
Only Thursday's incremental backup
Sunday's full backup and Thursday's incremental backup
Sunday's full backup and all incremental backups from Monday through Thursday
Sunday's full backup only
Correct answer
Sunday's full backup only
Incremental backups only contain changes since the last backup (full or incremental). Restoration requires the full backup plus all subsequent incrementals in order.
Which password policy provides the strongest security?
Minimum 8 characters with at least one uppercase, one lowercase, one number, and one special character
Minimum 6 characters
Password must contain the username
Password must be changed every 30 days
Correct answer
Minimum 8 characters with at least one uppercase, one lowercase, one number, and one special character
Complexity and length increase resistance to brute-force and dictionary attacks. Frequent changes alone are less effective if passwords are weak. Including username is a bad practice.
After installing new RAM, a technician encounters a BSOD with error 'PAGE_FAULT_IN_NONPAGED_AREA'. What is the most likely cause?
Corrupt system files
Faulty RAM module
Outdated graphics driver
Insufficient hard drive space
Correct answer
Faulty RAM module
This error typically indicates a memory access issue. New RAM is often faulty or incompatible. Run memtest86 to diagnose. System files or drivers could cause similar errors but are less likely after hardware change.
An employee loses a company smartphone containing sensitive client data. Which action should the technician take first?
Perform a factory reset on the device
Remotely wipe the device and disable associated accounts
File a police report
Change the employee's email password
Correct answer
File a police report
Remote wipe is the immediate step to protect data. Factory reset is only possible if the device is recovered. Police report and password changes are secondary actions.
In change management, what is the purpose of a rollback plan?
To document changes for compliance
To revert to the previous state if the change fails
To schedule changes during maintenance windows
To test the change in a staging environment
Correct answer
To test the change in a staging environment
A rollback plan defines steps to undo a change if it causes issues. Documentation and scheduling are part of the change process but not the primary purpose of a rollback plan.
A user wants to upgrade from Windows 10 Home to Windows 11 Pro on a compatible PC. What is the correct path?
Purchase a Windows 11 Pro license and use Windows Update to upgrade
Perform a clean install of Windows 11 Pro using installation media
Upgrade to Windows 11 Home first, then in-place upgrade to Pro
Use the Windows 10 Media Creation Tool to upgrade to Pro, then to Windows 11
Correct answer
Purchase a Windows 11 Pro license and use Windows Update to upgrade
You can directly upgrade from Windows 10 Home to Windows 11 Pro by entering a Pro license key during the upgrade. Clean install works but loses data. Upgrading to Windows 11 Home first is unnecessary; you can go directly to Pro. The Media Creation Tool does not support upgrading from 10 to 11 directly.
An application crashes repeatedly with a 'Memory could not be read' error. Which quick fix should the technician try first?
Run the application as administrator
Reinstall the application
Update video drivers
Run System File Checker
Correct answer
Reinstall the application
Reinstallation fixes corrupted application files causing the error. Running as administrator may not resolve corruption. Video drivers and SFC are less likely to fix an application-specific error.
Recall the answer before opening each card.
The chown command changes the owner and group of a file in Linux. chmod changes permissions, chgrp changes group only, and usermod modifies user account settings. Remember chown for ownership.
Disconnect from the network to prevent data exfiltration and further spread. Then boot into Safe Mode and run antivirus scans. This is the initial step before any remediation.
The bootrec command, specifically bootrec /fixmbr and bootrec /rebuildbcd, from Windows Recovery Environment Command Prompt repairs the boot configuration. It is targeted for missing bootmgr.
Restore the full backup first, then apply each incremental backup in chronological order. Incremental backups only contain changes since the last backup (full or incremental).
A policy requiring minimum 8 characters with at least one uppercase, one lowercase, one number, and one special character provides strength against brute-force and dictionary attacks. Complexity and length matter.
A faulty or incompatible RAM module. Run memtest86 to diagnose. System files or drivers are less likely after a hardware change. This error indicates a memory access issue.
Remote wipe the device to erase sensitive data immediately. Factory reset requires physical access. Police report and password changes are secondary steps after data protection.
A rollback plan defines steps to undo a change if it causes issues. It is not for testing (staging) or documentation. It ensures quick reversal to a stable state.
Purchase a Windows 11 Pro license and use Windows Update to upgrade directly. A clean install or upgrading to Windows 11 Home first is unnecessary. Enter the Pro key during upgrade.
Reinstall the application to replace corrupted files. Running as administrator or updating drivers may not resolve application-specific corruption. SFC is for system files, not apps.
chmod changes file permissions (read, write, execute) in Linux. It does not change ownership. chown changes ownership and group. Remember chmod for permissions.
Safe Mode loads minimal drivers, preventing many malware from running. It is used after disconnecting from network to isolate and remove malware without interference.
memtest86 tests RAM modules for errors. After a new RAM installation causing BSOD (e.g., PAGE_FAULT), run memtest86 to identify faulty or incompatible modules.
Remote wipe erases data on a lost device via network command. Factory reset requires physical access and restores device to factory settings. Remote wipe is immediate protection.
System Restore can revert system files and settings to an earlier point, possibly removing malware. However, it is not the first step; disconnect from network and scan first.
SFC scans and repairs corrupted Windows system files. Not typically used for application-specific errors; reinstall the app first. For system issues, run sfc /scannow.
It scans all disks for Windows installations and rebuilds the Boot Configuration Data (BCD), adding missing entries. Used in boot recovery, especially after missing bootmgr.
Incremental backup. It stores only changes since the last backup (full or incremental). Restoration requires the full backup plus all subsequent incrementals in order.
Incremental backs up changes since last backup; differential backs up changes since last full backup. Differential restore needs only full and latest differential; incremental needs all in sequence.
A staging environment mimics production to test changes before deployment. It is separate from a rollback plan, which defines steps to undo changes after issues occur.
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Connect the concepts
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This is an analysis of the practice bank, not a claim about the vendor's live exam blueprint. Use it to identify the knowledge, judgment, and recall patterns exercised here, then verify your coverage against the current official exam guide.
This practice bank tests proficiency with Linux file ownership commands and Windows recovery tools. The chown command changes file ownership, while chmod alters permissions and chgrp changes group only. For Windows boot failures like 'Bootmgr is missing,' the bootrec utility with commands such as /fixmbr and /rebuildbcd is the targeted solution. Additionally, upgrading from Windows 10 Home to Windows 11 Pro requires a valid Pro license key and can be done directly via Windows Update without a clean install. Understanding these operating system functions is critical for core 2 tasks.
The practice set emphasizes incident response procedures for malware and lost devices. When browser redirects and pop-ups appear, the first step is to disconnect from the network to prevent data exfiltration, then boot into Safe Mode for scanning. For a lost company smartphone with sensitive data, remote wipe should be performed immediately. Strong password policies require minimum 8 characters with complexity (uppercase, lowercase, number, special character) to resist brute-force attacks. Frequent changes alone are insufficient. Understanding these security measures helps protect organizational assets.
This practice bank covers backup methodologies and change management principles. Incremental backups only store changes since the last backup (full or incremental). To restore after a full backup on Sunday and incrementals on other days, you need the full backup plus all subsequent incrementals in order. In change management, a rollback plan defines steps to undo a change if it causes issues; it is not for testing (staging) or documentation. Proper backup and change control procedures are essential for IT operations and are tested on the core 2 exam.
The practice set includes troubleshooting common hardware and software errors. After installing new RAM, a 'PAGE_FAULT_IN_NONPAGED_AREA' BSOD indicates a faulty or incompatible RAM module; memtest86 should be used for diagnosis. For an application crashing with 'Memory could not be read,' the quick fix is to reinstall the application to repair corrupted files. Running as administrator or updating video drivers may not help. These scenarios reinforce systematic troubleshooting approaches for A+ core 2.
Study workflow
Immediately disconnect the system from the network to prevent data exfiltration and spread. Then boot into Safe Mode and run a full antivirus scan. Only after isolation and scanning should you consider System Restore or other remediation steps.
Boot from Windows installation media and access the Command Prompt. Use the bootrec command with /fixmbr and /rebuildbcd to repair the boot configuration. This targeted approach is more effective than Startup Repair for missing bootmgr.
To restore from a backup scheme that includes a full backup and subsequent incrementals, first restore the full backup, then apply each incremental backup in chronological order. Failure to follow the correct sequence will result in partial or inconsistent data.
When a new RAM installation causes a PAGE_FAULT_IN_NONPAGED_AREA BSOD, run memtest86 to test the modules. If errors are found, replace the faulty RAM with a compatible module. Also verify that the RAM is seated properly and compatible with the motherboard.
When an application crashes with a memory read error, the quickest fix is to reinstall the application. This replaces corrupted files without affecting system files. If the issue persists, check for driver updates or run SFC to rule out system file corruption.
FAQ
Clear boundaries on what the bank covers, how to use it, and where official vendor information still matters.
The chown command changes the owner and group of a file. chmod changes permissions, chgrp changes group only, and usermod modifies user account settings. For CompTIA A+, remember chown for ownership changes.
Disconnect the infected system from the network immediately to prevent data theft and further spread. After isolation, boot into Safe Mode and run scans. Do not perform System Restore or full scans before disconnecting.
You must first restore the full backup, then apply each incremental backup in the order they were created. Incrementals only contain changes since the last backup, so skipping any will result in missing data.
Use the bootrec command from the Windows Recovery Environment Command Prompt. Run bootrec /fixmbr and bootrec /rebuildbcd to rebuild the boot configuration data. This is more targeted than Startup Repair.
Purchase a Windows 11 Pro license key. During the upgrade via Windows Update, enter the Pro key to unlock the upgrade. A clean install is not required, and you can go directly from Windows 10 Home to Windows 11 Pro without first upgrading to Windows 11 Home.
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