Software Troubleshooting

391 soru

Soru 1Soru

A Windows workstation running an enterprise database utility experiences frequent '(Not Responding)' freezes followed by sudden application crashes during heavy reporting tasks. Task Manager shows moderate CPU (25%) and Memory (40%) utilization, but overall responsiveness drops significantly during file exports. A technician suspects storage subsystem latency is causing the application timeouts and crashes. Which of the following tools and metrics should the technician inspect FIRST to isolate this storage performance bottleneck?

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Cevap: Resource Monitor to evaluate Disk Queue Length and Average Response Time for the specific process.

Cevap

Resource Monitor to evaluate Disk Queue Length and Average Response Time for the specific process.
Evaluating Resource Monitor allows the technician to break down disk performance by individual process. Checking metrics such as Disk Queue Length and Average Response Time directly measures storage latency and I/O saturation, confirming if storage bottlenecks are causing application timeouts.

Adım Adım Çözüm

1
Analyze the symptoms described in the scenario
CPU and Memory utilization are normal, but disk-heavy tasks cause freezes and application crashes due to suspected storage latency.
Identifying the root system component affected helps narrow down the diagnostic tool required.
2
Select the administrative tool designed for real-time process-specific disk I/O analysis
Resource Monitor displays active processes along with real-time disk response times and queue lengths.
High Disk Queue Length (consistently above 2 per disk) and elevated Average Response Time (ms) confirm disk I/O bottlenecks.

Anahtar Kavram

Identifying Storage Performance Bottlenecks with Resource Monitor
Tahmini Süre:1m 15s
Soru 2Soru

An IT support technician is troubleshooting a Windows 10 computer that fails to boot following an improper shutdown. Upon starting, the system displays the error message "The Boot Configuration Data for your PC is missing or contains errors. Error code: 0xc000000f." The technician boots into the Windows Recovery Environment (WinRE) Command Prompt and attempts to repair the boot configuration by running `bootrec /rebuildbcd`. The command identifies the `C:\Windows` installation, but when attempting to add it to the boot list, it fails with the error message "The requested system device cannot be found." Further inspection using `diskpart` reveals that the system drive utilizes GUID Partition Table (GPT) formatting with an unlettered FAT32 EFI System Partition (ESP). Which of the following commands should the technician execute NEXT to successfully repair the boot files?

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Cevap: Use `diskpart` to assign a drive letter to the EFI System Partition, exit `diskpart`, and execute `bcdboot C:\Windows /s S: /f UEFI` to regenerate the BCD store and boot configuration files.

Cevap

Assign a drive letter to the EFI System Partition using diskpart and execute bcdboot to copy fresh boot files to the EFI partition.
When a Windows system configured with UEFI/GPT displays BCD error 0xc000000f and `bootrec /rebuildbcd` fails with 'The requested system device cannot be found', it indicates that WinRE cannot locate or write to the hidden EFI System Partition (ESP). The proper solution is to use `diskpart` to assign a temporary drive letter (such as `S:`) to the volume, exit `diskpart`, and use `bcdboot C:\Windows /s S: /f UEFI` to synthesize fresh boot environment files and recreate the BCD store on the ESP.

Adım Adım Çözüm

1
Identify the system architecture and boot mode.
The disk uses GPT partitioning and UEFI boot architecture, which relies on a hidden FAT32 EFI System Partition (ESP) rather than an MBR boot sector.
Legacy boot recovery tools (`bootrec /fixmbr` or `bootrec /fixboot`) do not work on UEFI systems.
2
Diagnose why `bootrec /rebuildbcd` failed with 'The requested system device cannot be found.'
WinRE cannot locate the hidden EFI System Partition because it does not have a mounted drive letter.
Without an accessible drive letter for the ESP, boot repair utilities cannot write or update BCD store records.
3
Assign a temporary volume letter to the ESP in `diskpart` and run `bcdboot`.
Executing `bcdboot C:\Windows /s S: /f UEFI` creates new BCD environment data and copies required boot files directly from `C:\Windows` into the EFI partition.
The `bcdboot` command is specifically designed to initialize and repair the EFI system partition for UEFI-based Windows installations.

Anahtar Kavram

Troubleshooting UEFI/GPT Windows Boot and BCD Store Corruption
Tahmini Süre:2m 0s
Soru 3Soru

A system administrator is troubleshooting a Windows 11 workstation that experiences random application instability. An elevated Command Prompt session was opened, and the administrator executed `sfc /scannow`. The process completed with the message: "Windows Resource Protection found corrupt files but was unable to fix some of them." Further log analysis reveals that the replacement payload files within the local component store are also corrupted. Which of the following commands should the administrator execute NEXT to repair the component store so that system file integrity can be successfully restored?

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Cevap: dism /online /cleanup-image /restorehealth

Cevap

The administrator should run `dism /online /cleanup-image /restorehealth` to repair the damaged local component store before re-running the System File Checker.
The correct action is executing `dism /online /cleanup-image /restorehealth`. System File Checker (`sfc /scannow`) inspects critical operating system files and replaces corrupted ones using healthy copies stored in the Windows component store (`%WinDir%\System32\WinSxS`). When SFC reports that it found corrupt files but could not fix them due to component store corruption, DISM must be used to repair the store first.

Adım Adım Çözüm

1
Analyze the SFC command output message.
Identify that SFC failed to repair files because the source component store (WinSxS) is corrupt.
SFC replaces corrupted core OS files using clean copies cached in the Windows component store. If those cached copies are damaged, SFC cannot perform repairs.
2
Select the proper servicing command to repair the component store.
Execute `dism /online /cleanup-image /restorehealth` from an elevated prompt.
Deployment Image Servicing and Management (DISM) scans and repairs the Windows image and WinSxS store using Windows Update or specified media.
3
Re-run system file verification after DISM repair.
Execute `sfc /scannow` once DISM successfully completes.
With a healthy component store restored, SFC can now successfully replace damaged operating system files.

Anahtar Kavram

Repairing the Windows Component Store with DISM prior to running SFC when local repair payloads are corrupted.
Soru 4Soru

A field technician reports that a specialized telemetry logging app on a company-issued Android tablet takes a long time to start up, stutters when loading local data, and consumes excessive background memory. Other system utilities and mobile apps on the tablet perform normally. Which of the following initial, least-invasive troubleshooting steps should the technician take to resolve this issue? (Select TWO.)

Geçerli olan tümünü seçin

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Cevap: Force stop the telemetry logging application and clear its application cache.; Check for and apply available software updates for the specific application.

Cevap

The technician should force stop the application and clear its cache, as well as check for and apply available application updates.
In accordance with standardCompTIA least-invasive troubleshooting practices, isolated mobile application slowness and memory issues should be handled first by non-destructive measures such as force closing the app, clearing its temporary cache, and installing developer-provided app updates.

Adım Adım Çözüm

1
Isolate the issue to the application layer
Confirm that only the telemetry logging application is experiencing slowness and background memory issues while the rest of the mobile OS operates normally.
Identifying that the problem is isolated to a single app prevents unnecessary system-wide troubleshooting or destructive OS actions.
2
Apply least-invasive application reset measures
Force stop the app process and clear its temporary cache files from settings.
Clearing temporary cache removes potentially corrupted temporary files and terminates hung execution threads without erasing user accounts or stored data.
3
Verify and apply application updates
Install any pending updates for the application.
Developers release software patches to fix memory leaks and performance glitches in mobile applications.

Anahtar Kavram

Least-invasive mobile application troubleshooting methodology
Soru 5Soru

A healthcare provider reports that a proprietary patient charting application on an Android tablet frequently becomes unresponsive when displaying high-resolution laboratory results. The technician notes that the tablet has sufficient internal storage space, but the application process remains hung in memory even after navigating back to the main menu. The technician wants to restore app responsiveness using the least invasive method while ensuring local application data and login configurations are preserved. Which of the following actions should the technician perform FIRST?

Cevabı ve açıklamayı göster

Cevap: Force stop the application and clear the application cache.

Cevap

Force stop the application and clear the application cache.
Force stopping the application terminates the unresponsive background process occupying system memory, while clearing the app cache removes temporary files that often cause application performance degradation or freezing. This action is the least invasive step because it preserves user settings, login tokens, and stored application data.

Adım Adım Çözüm

1
Identify the primary problem and constraints
The application process is hung in memory and freezing, requiring resolution without clearing local app data or user settings.
CompTIA troubleshooting methodology requires starting with the least invasive action that resolves the issue while minimizing user impact.
2
Evaluate the difference between application cache and application data in Android
Clearing the cache deletes temporary files that may cause unresponsiveness while keeping user configurations intact. Clearing data resets the app to its newly installed state.
The cache stores non-essential temporary assets, making its deletion completely safe for local settings.
3
Select the initial least invasive troubleshooting step
Force stopping the hung process releases system RAM, and clearing the cache flushes temporary corrupted files.
This sequence addresses both the hung background process and potential corrupted temporary files with zero risk of data loss.

Anahtar Kavram

Least-Invasive Mobile Application Troubleshooting
Tahmini Süre:2m 0s
Soru 6Soru

A field technician's mobile tablet loses access to enterprise network resources after returning from a client site. Network logs show that HTTPS traffic from the device is being intercepted by an unauthorized proxy server, and the device's Mobile Device Management (MDM) agent reports a compliance violation. Further investigation reveals a third-party diagnostic utility was recently sideloaded on the device. Which TWO of the following initial actions should the systems administrator perform to remediate the security breach and restore secure connectivity?

Geçerli olan tümünü seçin

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Cevap: Remove the untrusted third-party root certificate installed in the device's credential storage.; Uninstall the sideloaded application and force an MDM compliance check to restore enterprise access tokens.

Cevap

The administrator should remove the untrusted root certificate from the device's credential storage and uninstall the sideloaded application, then initiate an MDM compliance check to restore enterprise access.
Sideloaded applications can install untrusted root CA certificates into mobile credential stores to intercept encrypted SSL/TLS communications. Removing the untrusted certificate stops the interception, while removing the unauthorized app and triggering an MDM compliance sync clears the security violation and restores corporate access tokens.

Adım Adım Çözüm

1
Identify the vector of traffic interception and compliance failure.
Determined that a sideloaded diagnostic utility installed an untrusted root certificate, enabling MitM SSL interception and triggering an MDM policy violation.
Sideloaded apps frequently install custom CA certificates to inspect or redirect network traffic, violating enterprise security policy.
2
Remediate certificate store contamination and remove malicious software.
The untrusted root CA certificate is removed from the user credential store, and the sideloaded diagnostic tool is uninstalled.
Removing the root certificate breaks the MitM trust chain, and deleting the application prevents further policy violations.
3
Perform MDM posture re-evaluation.
The MDM agent verifies device health and re-issues corporate access tokens.
Once non-compliant applications and certificates are purged, forcing an MDM sync restores enterprise connectivity.

Anahtar Kavram

Mobile OS Security, Untrusted Certificate Remediation, and MDM Compliance Synchronization
Soru 7Soru

A help desk technician is troubleshooting a Windows 11 enterprise workstation that continuously redirects web requests to malicious advertising sites, frequently exhibits pop-up windows, and reverts proxy settings to a rogue IP address. Place the following remediation steps in the correct order to eliminate the browser hijack and restore secure functionality.

Öğeleri doğru sıraya koymak için sürükleyin

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Cevap

The correct sequence for resolving a persistent web browser security and redirect compromise is: 1) Disconnect the workstation from the network, 2) Inspect the local hosts file, remove rogue extensions, and reset proxy settings, 3) Execute a thorough anti-malware scan and reset browser configurations to defaults, 4) Reconnect to the network, apply browser updates, and verify functionality, 5) Provide end-user security awareness training.
The correct sequence adheres to CompTIA troubleshooting and malware remediation methodologies: network isolation first, removal of persistence mechanisms (hosts file, proxy settings, extensions) second, anti-malware scanning and browser defaults reset third, system/browser updates and verification fourth, and end-user security awareness training fifth.

Adım Adım Çözüm

1
Isolate the infected machine from the network.
Stops communication with malicious external servers and prevents ongoing data exfiltration or payload downloads.
Security best practices dictate isolating compromised systems prior to remediation.
2
Remove persistence mechanisms (hosts file edits, rogue extensions, manual proxy overrides).
Disables active malicious redirection mechanisms causing browser pop-ups and traffic re-routing.
If proxy overrides or hosts modifications remain, traffic will continue to redirect even after browser restarts.
3
Run full anti-malware scanning and reset browser settings.
Removes underlying adware/malware payloads and restores default search engine and homepage settings.
A browser reset ensures all hidden malicious scripts and corrupted web data are removed.
4
Reconnect network, patch software, and verify resolution.
Ensures vulnerabilities are remediated and browser pop-up blockers function properly.
Applying patches prevents re-infection from known browser vulnerabilities.
5
Document findings and educate the user.
Helps the user identify social engineering tactics and suspicious pop-up installation prompts.
Prevents future security breaches caused by human error.

Anahtar Kavram

Browser Hijack and Pop-Up Remediation Procedure
Soru 8Soru

During a routine compliance audit, an enterprise mobility administrator discovers that a managed mobile device has been installed with an unauthorized third-party configuration payload containing a rogue Certificate Authority (CA) root certificate. This has resulted in man-in-the-middle certificate warnings whenever the user accesses internal HTTPS sites. Which of the following actions should the administrator take FIRST to mitigate this security risk?

Cevabı ve açıklamayı göster

Cevap: Remove the unauthorized configuration payload and delete the custom root certificate from the device storage.

Cevap

Remove the unauthorized configuration payload and delete the custom root certificate from the device storage.
Removing the unauthorized configuration payload and its associated root certificate directly eliminates the untrusted certificate authority from the operating system's trust store. This stops potential man-in-the-middle inspection of secure traffic and restores standard certificate validation routines.

Adım Adım Çözüm

1
Identify the source of untrusted SSL/TLS certificate warnings on the mobile device.
Discovered a rogue third-party configuration profile introducing an unauthorized root CA certificate.
Rogue root certificates allow attackers to intercept and inspect encrypted network communications.
2
Locate and remove the offending profile within the mobile operating system management settings.
The unauthorized profile and associated root certificates are deleted from the device's trust store.
Targeted removal eliminates the attack vector without destroying user data or disrupting legitimate carrier profiles.
3
Verify secure connectivity to enterprise resources.
HTTPS connections validate using the legitimate corporate CA without triggering security alerts.
Ensures full restoration of proper TLS certificate chain validation.

Anahtar Kavram

Mobile OS Security and MDM Profile Remediation
Soru 9Soru

A remote employee reports that while working in a public venue, their corporate-managed smartphone automatically connected to an open Wi-Fi hotspot broadcasting a SSID identical to their office network. Shortly after, corporate email syncing failed, and the device displayed continuous background location tracking activity. Upon inspection, an IT technician suspects a rogue access point attack compromised the device by installing a malicious management payload. Which TWO of the following actions should the technician perform immediately to remediate the security breach and restore secure operation?

Geçerli olan tümünü seçin

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Cevap: Remove the malicious configuration profile from the mobile operating system security settings.; Revoke and reset the user's corporate account credentials and authentication tokens.

Cevap

The technician should remove the malicious configuration profile from the security settings and revoke/reset the user's corporate credentials.
When a mobile device connects to a rogue access point, attackers often push untrusted configuration profiles containing rogue certificates or malicious settings. Removing the bad configuration profile cleans the device's certificate store, while resetting corporate user credentials prevents account takeover using credentials captured during the man-in-the-middle interception.

Adım Adım Çözüm

1
Identify and isolate the unauthorized device configuration payload.
Discovers a rogue mobile profile installed during the forced open Wi-Fi connection.
Rogue profiles can install untrusted root CA certificates that allow attackers to intercept traffic and monitor device telemetry.
2
Remove the untrusted configuration profile from the mobile OS settings.
Eliminates the persistent malicious permissions and rogue root certificates.
Deleting the profile restores normal system certificate validation and stops unauthorized telemetry.
3
Reset user authentication credentials across all corporate systems.
Invalidates compromised session tokens and passwords.
Prevents unauthorized access to corporate resources in case credentials were stolen while connected to the rogue access point.

Anahtar Kavram

Mobile security profile remediation and rogue access point incident response
Soru 10Soru

A restaurant server reports that the primary point-of-sale (POS) order-entry application on an Android handheld device becomes increasingly sluggish and slow to register touch inputs after several hours of active deployment during a shift. The tablet's operating system navigation and all other built-in utilities continue to perform normally. Which of the following actions should the technician perform FIRST to address this performance issue with the least operational disruption?

Cevabı ve açıklamayı göster

Cevap: Force stop the application and clear its temporary cache files in application settings.

Cevap

Force stop the application and clear its temporary cache files in application settings.
Force stopping the application halts any active memory leaks or stuck background threads, while clearing the app cache removes accumulated temporary files. This is the least invasive targeted action that preserves saved user configurations and application data.

Adım Adım Çözüm

1
Identify the scope of the mobile performance issue.
The issue is localized to a single application, while the underlying mobile OS and overall system response remain healthy.
Isolation confirms the problem stems from application state or cached runtime memory consumption rather than system-wide hardware degradation.
2
Apply the least invasive troubleshooting method.
Force stopping the application terminates background memory leaks, and clearing the app cache purges unneeded temporary files while preserving user settings and local database configurations.
CompTIA troubleshooting methodology dictates escalating from least invasive remedies (force stop/clear cache) to more disruptive interventions (clear data, app reinstall, factory reset) only if basic steps fail.

Anahtar Kavram

Mobile Application Troubleshooting Sequence (Least Invasive First)
Soru 11Soru

A corporate site manager reports that a specialized blueprint annotation application on an enterprise Android tablet frequently freezes and becomes unresponsive after several hours of continuous site inspections. The technician confirms that available device storage is sufficient and all other mobile applications are operating smoothly. According to standard mobile OS troubleshooting methodology, which of the following actions should the technician perform FIRST using the least invasive approach?

Cevabı ve açıklamayı göster

Cevap: Force stop the blueprint annotation application and clear its application cache.

Cevap

Force stop the application and clear its cache.
Force stopping the un-responsive application and clearing its application cache terminates hanging processes and removes cached temporary files without erasing user files or app settings. This represents the proper least invasive step in mobile OS troubleshooting.

Adım Adım Çözüm

1
Isolate the issue scope.
Since only the blueprint app freezes while other apps and storage function normally, the problem is localized to the application's runtime state.
CompTIA troubleshooting methodology requires isolating whether an issue is system-wide or limited to a specific software package.
2
Select the least invasive resolution step.
Force stopping the app halts stuck background threads, and clearing the app cache purges temporary files that may be corrupted.
Least invasive actions should always be attempted before destructive or highly disruptive procedures like resetting app data, reinstalling the app, or factory resetting the device.

Anahtar Kavram

Least-invasive application troubleshooting sequence on mobile operating systems
Soru 12Soru

An enterprise employee reports receiving continuous, realistic Windows system pop-up alerts warning of severe virus infections and prompting them to call an unauthorized helpline. The technician observes that these pop-ups originate from the desktop Notification Center even when no web browser windows are actively open. A detailed review of running processes, startup items, and scheduled tasks reveals no malicious executables. Which of the following troubleshooting actions should the technician perform to permanently stop these pop-up alerts?

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Cevap: Revoke notification permissions and unregister background service workers for untrusted domains in the browser privacy settings.

Cevap

Revoke notification permissions and unregister background service workers for untrusted domains in the browser privacy settings.
The correct action is to revoke notification permissions and unregister background service workers within the browser settings. Modern browsers support Web Push APIs, allowing malicious websites to trick users into accepting notifications that present as native system pop-ups even when the browser is closed. Removing the site permissions stops the pop-ups immediately.

Adım Adım Çözüm

1
Analyze the symptom indicators and delivery vector.
Identified that notifications appear in the OS Notification Center while no malicious processes exist in Task Manager, pointing to browser Web Push Notifications and Service Workers.
HTML5 Web Push APIs and Service Workers allow approved websites to push native OS notifications even when the browser interface is not visible.
2
Access the browser's Site Settings / Content Permissions controls.
Located the list of allowed domains under Notification Permissions and active Service Workers.
Users often inadvertently click 'Allow' on deceptive website prompts asking for notification permissions.
3
Remove unauthorized domains and reset permission defaults.
Rogue domains are blocked from sending notification payloads and their service workers are deleted.
Removing permission revokes the push subscription token, permanently preventing further desktop pop-up alerts.

Anahtar Kavram

Web Push Notification & Service Worker Permission Management
Soru 13Soru

An employee reports that after downloading a third-party battery optimization utility from an unverified website onto their corporate Android device, the phone frequently displays persistent overlay advertisements and battery drain. When the technician attempts to uninstall the application via the standard Application Manager, the Uninstall button is grayed out. Which of the following is the BEST initial action to revoke the application's elevated permissions and allow standard uninstallation?

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Cevap: Revoke the application's active Device Administrator privileges in the security settings.

Cevap

Revoke the application's active Device Administrator privileges in the security settings.
When a sideloaded application receives Device Administrator rights, the operating system grays out the option to uninstall it to protect system-level processes. Deactivating these administrative rights under the device security settings revokes the protection lock and restores standard application uninstallation capability.

Adım Adım Çözüm

1
Identify the cause of the disabled uninstall option
Recognize that the grayed-out uninstall button indicates the application holds active Device Administrator privileges.
Mobile operating systems lock application removal when an application is registered as a active Device Administrator.
2
Navigate to the Security settings on the mobile device
Access the Device Admin Apps / Device Administrators menu.
This security menu lists all applications granted system-level administration rights.
3
Deactivate Device Administrator privileges for the problematic application
The application loses elevated rights, enabling normal management actions.
Revoking these rights removes the OS removal restriction.
4
Uninstall the application through the Application Manager
The application is successfully removed from the device.
With administrative privileges removed, standard uninstallation functions normally.

Anahtar Kavram

Device Administrator Privilege Revocation
Soru 14Soru

A tier-2 desktop support technician is investigating a Windows 11 workstation where users report persistent pop-up advertisement redirects. While auditing the browser environment, the technician removes a rogue browser add-on, but finds that a local HTTP proxy setting pointing to address 127.0.0.1:8080127.0.0.1:8080 automatically reinstates itself in the system network settings every time the computer restarts. Which of the following actions should the technician perform NEXT to permanently resolve the redirect issue?

Cevabı ve açıklamayı göster

Cevap: Inspect Task Scheduler and background system services for unauthorized persistence scripts or executable files re-applying the proxy settings.

Cevap

Inspect Task Scheduler and background system services for unauthorized persistence scripts or executable files re-applying the proxy settings.
Inspecting Task Scheduler and background services directly targets the persistent loader causing the setting to revert. Adware and browser hijackers frequently write scheduled tasks or background services to monitor and re-apply proxy registry entries whenever the user logs in or reboots.

Adım Adım Çözüm

1
Analyze the symptom of automatic setting re-initialization upon system restart.
Identified that an external system mechanism outside the browser application is maintaining persistence.
When browser configuration changes revert across system reboots, an operating system startup item, scheduled task, or background service is actively modifying registry keys.
2
Check persistent operating system launch locations including Task Scheduler, Services, and Startup keys.
Locate and disable the unauthorized task or background process responsible for enforcing 127.0.0.1:8080127.0.0.1:8080 proxy redirection.
Removing the underlying startup loader prevents the malicious proxy configuration from re-engaging.
3
Reset the proxy configuration back to default settings and verify remediation.
Browser network settings remain clean after subsequent reboots.
Ensures complete removal of both the hijack payload and its persistence mechanism.

Anahtar Kavram

Browser Hijacker Persistence Remediation
Tahmini Süre:1m 15s
Soru 15Soru

A IT support technician is troubleshooting a user's workstation where opening any website in the primary web browser results in immediate redirection to an ad-heavy third-party search engine. During initial investigation, the technician finds an unrecognized browser extension running and discovers that the system's local network settings have been changed to direct HTTP traffic through a suspicious external port. Which of the following actions should the technician perform to resolve the browser redirection and restore proper internet routing? (Select TWO.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Uninstall the unrecognized browser extension and restore the browser settings to default values.; Disable the unauthorized proxy server settings in the operating system's network configuration.

Cevap

The correct actions are to uninstall the unrecognized browser extension while resetting browser defaults, and to disable the unauthorized proxy server settings in the operating system's network configuration.
Uninstalling the unrecognized extension removes the rogue browser component causing the redirection, while resetting browser defaults cleans up modified homepages and search configurations. Disabling the unauthorized proxy server in network settings restores standard web traffic routing.

Adım Adım Çözüm

1
Remove malicious browser add-ons and reset configuration.
Eliminates the rogue extension managing browser redirection and restores default search engine and homepage parameters.
Rogue extensions are common persistence vectors for browser hijackers.
2
Inspect and reconfigure system LAN proxy settings.
Ensures internet requests bypass the unauthorized proxy server.
Browser hijackers often alter system-wide proxy settings to re-route all outbound web traffic through malicious servers.

Anahtar Kavram

Browser Hijack & Proxy Remediation
Soru 16Soru

A technician resolves a browser hijacking issue on a user's computer by clearing browser settings, resetting the default search engine, and removing unauthorized extensions. However, as soon as the user restarts the computer and launches the web browser, the search engine and homepage immediately revert back to the malicious redirection site. Which of the following is the MOST likely cause of the persistent browser modification?

Cevabı ve açıklamayı göster

Cevap: A malicious background process or scheduled task is restoring the unauthorized settings upon reboot.

Cevap

A malicious background process or scheduled task is restoring the unauthorized settings upon reboot.
The correct answer highlights that a background startup mechanism, such as a scheduled task or persistent process, is actively restoring the malicious browser configuration upon reboot. When manual browser resets fail to persist across system reboots, technicians must investigate auto-start locations and active background processes to eliminate the root malware component.

Adım Adım Çözüm

1
Analyze the symptoms
The technician successfully reset the browser settings, but the malicious redirection returned immediately after system reboot.
When browser settings revert automatically across system reboots despite manual remediation, a persistent mechanism outside the browser is actively restoring the changes.
2
Identify the persistence mechanism
Recognize that malware frequently installs startup items, services, or scheduled tasks to maintain persistence on the host operating system.
Standard browser cleanup steps will be continuously overridden until the underlying startup mechanism or malicious executable is removed.

Anahtar Kavram

Browser Hijacker Persistence & Remediation
Soru 17Soru

A systems administrator is responding to an alert on a standalone Windows point-of-sale terminal that is exhibiting unauthorized background network connections and altered registry run keys. The administrator has verified the malware infection and immediately unplugged the network cable to isolate the workstation. According to CompTIA's standard 7-step malware removal procedures, which of the following actions should the administrator perform NEXT?

Cevabı ve açıklamayı göster

Cevap: Disable System Restore and delete all existing restore points on the infected workstation.

Cevap

Disable System Restore and delete all existing restore points on the infected workstation.
The official CompTIA 7-step malware removal process follows this exact order: 1. Identify malware symptoms, 2. Isolate infected systems, 3. Disable System Restore (in Windows), 4. Remediate infected systems (update anti-malware / scan and remove), 5. Schedule scans and run updates, 6. Enable System Restore and create a restore point, 7. Educate the end user. Since the scenario explicitly confirms that identification and isolation have taken place, the administrator must immediately disable System Restore to purge infected restore points.

Adım Adım Çözüm

1
Review the scenario to identify the current step reached in the CompTIA 7-step malware removal process.
Malware symptoms have been identified (Step 1) and the workstation has been isolated from the network (Step 2).
The scenario explicitly establishes that identification and isolation are complete.
2
Determine the mandatory next step in the standard 7-step malware removal workflow.
Step 3 requires disabling System Restore (System Protection in Windows).
Disabling System Restore prevents infected system files stored within restore points/Volume Shadow Copies from being used to restore the machine or reinfecting it later.
3
Select the option that strictly corresponds to Step 3 of the CompTIA methodology.
Disabling System Restore and deleting existing restore points is the correct next action.
Remediation (scans/updates), scheduling, re-enabling System Restore, and end-user education must strictly follow in subsequent steps.

Anahtar Kavram

CompTIA 7-Step Malware Removal Procedure Sequence
Soru 18Soru

An IT technician on an offshore logistics terminal is servicing a dedicated cargo-manifest workstation that is infected with persistent ransomware and trojan spyware. The technician has already identified the symptoms and isolated the infected machine from the local area network and wireless access points. According to the CompTIA 7-step malware removal process, which of the following actions must the technician perform NEXT before running a full system scan to remediate the infected endpoint? (Select TWO.)

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Disable System Restore (or System Protection) in the Windows operating system.; Update the local anti-malware definition database using an offline update package on a verified USB drive.

Cevap

The correct actions are disabling System Restore to prevent malware persistence in backups and updating the anti-malware signature definitions via offline media before initiating the scan.
Following system isolation (Step 2), the CompTIA malware removal framework requires disabling System Restore (Step 3) to purge corrupted restore points, followed by updating anti-malware signatures and scanning the environment (Step 4). Because network connectivity is severed during isolation, anti-malware engine definitions must be updated locally using removable media.

Adım Adım Çözüm

1
Review the current phase within the CompTIA 7-step malware removal process.
Step 1 (Identify symptoms) and Step 2 (Isolate system) are already complete.
The scenario states the technician has identified the infection and disconnected all network connections.
2
Execute Step 3 of the process: Disable System Restore.
System Restore is turned off, clearing unverified restore points that may contain malicious payloads.
Malware frequently hides in restore points or relies on system restore to reinstate itself after deletion.
3
Execute Step 4a of the process: Update anti-malware signatures.
Anti-malware definitions are updated manually using removable offline media.
Because the endpoint remains isolated from the network, online updates are impossible; definitions must be updated manually prior to scanning.

Anahtar Kavram

CompTIA 7-Step Malware Removal Procedure
Soru 19Soru

A corporate workstation running Windows 11 experiences malicious web search redirects and untrusted SSL certificate warnings across all installed web browsers (Google Chrome, Microsoft Edge, and Mozilla Firefox). A technician notices that all HTTP and HTTPS traffic is being routed through an unfamiliar local IP address on port 8080 regardless of which browser is opened. Which of the following actions should the technician perform FIRST to stop the system-wide traffic redirection?

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Cevap: Inspect and reset the system proxy server settings in Windows Network & Internet settings.

Cevap

Inspect and reset the system proxy server settings in Windows Network & Internet settings.
The correct answer is to inspect and reset the system proxy server settings in Windows Network & Internet settings. Windows utilizes central WinINet proxy settings that apply across multiple browsers (including Chrome, Edge, and Firefox). When malware configures a unauthorized manual proxy or automatic proxy script, all outbound browser connections are redirected through a rogue intermediary server, producing certificate errors and search redirects across all browsers simultaneously.

Adım Adım Çözüm

1
Analyze the symptoms
The issue affects all installed browsers on the OS simultaneously and routes traffic through a specific local IP/port combination, pointing to a central system-level setting rather than individual browser add-ons.
Windows applications (including Chrome, Edge, and Firefox by default) rely on the operating system's system-wide proxy configurations (WinINet settings).
2
Identify the remediation entry point
Navigate to Settings > Network & Internet > Proxy (or Internet Options > Connections > LAN Settings).
This area controls whether automatic proxy setup scripts (PAC files) or manual proxy servers are enabled globally for client network applications.
3
Disable unauthorized proxy parameters
System traffic immediately resumes direct connection paths to standard network gateways, clearing certificate warnings caused by rogue proxy interception.
Removing the proxy server entry breaks the redirection vector used by the adware/malware.

Anahtar Kavram

System-Wide Web Proxy Configuration and Browser Security Remediation
Soru 20Soru

A systems administrator at an automated distribution facility notices that a Windows-based picking console is periodically dropping local service responses, running unprompted background tasks, and generating unauthorized outbound connections. The administrator confirms a malware infection and immediately quarantines the console by disconnecting its Ethernet cable and turning off all wireless radios. According to CompTIA's standard 7-step malware removal procedures, which of the following actions should the administrator perform NEXT?

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Cevap: Disable System Restore in Windows.

Cevap

The administrator should disable System Restore in Windows before attempting remediation.
CompTIA's official 7-step malware remediation process specifies the following sequence: 1. Identify malware symptoms, 2. Isolate infected systems, 3. Disable System Restore (in Windows), 4. Remediate infected systems (update anti-malware software / scan and use removal techniques), 5. Schedule scans and run updates, 6. Enable System Restore and create a restore point, 7. Educate the end user. Because the technician has already identified the symptoms and isolated the system, the mandatory next step is disabling System Restore.

Adım Adım Çözüm

1
Analyze the current state within the 7-step malware removal process.
Step 1 (Identify symptoms) and Step 2 (Isolate the infected system) have already been completed.
The scenario explicitly notes confirmed symptoms and the active physical/wireless network isolation of the machine.
2
Determine the required 3rd step in CompTIA's standard malware removal methodology.
Step 3 dictates disabling System Restore (in Windows).
Disabling System Restore purges pre-existing restore points where malware components might reside and prevents clean snapshots from being polluted.
3
Evaluate subsequent steps (Step 4 Remediate, Step 5 Schedule scans, Step 6 Enable System Restore, Step 7 Educate user).
Remediation scanning and signature updates take place in Step 4, after System Restore is disabled.
Following the strict sequence prevents re-infection during or after cleanup.

Anahtar Kavram

CompTIA 7-Step Malware Remediation Best Practices
Sayfa 1 / 20Sonraki
Software Troubleshooting Alıştırma Soruları — CompTIA A+ (Core 1 & Core 2) | Examkin