These symptoms strongly suggest malware activity—likely from the newly installed app. The first action should be torun a malware scanto detect and isolate malicious software.

FromQuentin Docter – CompTIA A+ Study Guide:

“Signs of malware infection include rapid battery drain and overheating. The first step should be a malware scan using trusted mobile antivirus apps.”

Linux commonly uses Linux-native filesystems (such as ext4, XFS, BTRFS, and others). The All-in-One Exam Guide explicitly states: “Linux users have lots to choose from; most use ext4, but you will see others with names like BTRFS, XFS, ZFS, and so on.” That directly links XFS to Linux.

By contrast, the same source identifies NTFS, FAT32, and exFAT as Windows file systems, with exFAT mainly for removable media, showing that FAT32/NTFS are primarily Windows-associated in A+ context. Quentin Docter also explains Linux’s ext-family filesystems (ext3/ext4) as Linux defaults in many distributions, reinforcing that Linux has its own native filesystem ecosystem rather than using NTFS/APFS as its typical format.

APFS is Apple’s filesystem for macOS/iOS devices, not Linux. FAT32 is cross-platform but not “typically associated” with Linux as a primary filesystem. Therefore, XFS (B) is the best answer.

This scenario involves a mismatch in device time settings, which can affect synchronization and authentication across the network. Using a Network Time Protocol (NTP) server ensures all networked devices maintain accurate and synchronized clocks.

From Travis Everett – All-in-One Exam Guide:

“NTP servers keep all devices on a network in sync. This prevents time drift, which can cause authentication issues with domain logins, certificates, and applications.” .

This is macOS “Gatekeeper”-style behavior: the OS warns when an app is not from a trusted source (for example, not signed/not from an identified developer). In Quentin Docter’s macOS section, the correct place to control what apps are allowed is Security & Privacy. He states that in Security & Privacy, “the applications downloaded on the device can also be controlled; you can select whether apps can be downloaded only from the App Store or from App Store And Identified Developers, which is the default.” He also notes many advanced settings in Security & Privacy require unlocking with an administrator password.

Although the exact control is on the General area of Security & Privacy (not the Privacy tab itself), among the answer choices the closest and intended match is Privacy (A) because it points to the correct macOS security settings area in System Preferences/System Settings. Accessibility and Finder do not manage app trust controls, and iCloud relates to syncing/account services rather than software signing enforcement.

These symptoms strongly indicatemalware infectionor a malicious app running in the background. The first action should be torun a malware scanto identify and remove malicious components.

FromQuentin Docter – CompTIA A+ Complete Study Guide:

“If a mobile device is overheating and the battery drains rapidly after installing an app, this could point to malware. Begin by scanning the device with a mobile anti-malware application.”

Highmemory usage (97%)suggests the system is overloaded with active processes. The technician should close unneeded applications to free up RAM and improve performance.

FromMike Meyers ' Lab Manual:

“When memory usage is near capacity, close all non-essential programs. This can dramatically improve response time without needing hardware upgrades.”

Windows Helloallows biometric and PIN-based login, which are easier and more user-friendly than passwords.

FromQuentin Docter – CompTIA A+ Complete Study Guide:

“Windows Hello supports biometric authentication and PINs, providing easier and secure access especially for users who have trouble remembering passwords.”

A “central log-in” means users can authenticate using a centralized account database rather than separate local accounts on each PC—this is a core feature of a Windows domain . Mike Meyers explains that a Windows domain makes it easy for anyone with a domain account to log on to any computer in the domain with a single account , a process called “single sign-on (SSO),” and that users do not need a separate local account stored on every computer. The All-in-One guide reinforces the same: in a domain, the domain controller stores domain accounts and “a user logging on to any computer on the domain may use their one domain account to log on to the entire network.”

Active Directory is the directory service commonly used to implement domains, but the question asks what is required for centralized logon on the workstation side— the computer must be joined to the domain (domain membership). Workgroups use only local accounts, and Local Group Policy Editor manages policies locally, not centralized authentication.

Shreddingphysically destroys the platters, making data recovery virtually impossible. It ' s more effective and accessible than degaussing or low-level formatting.

FromQuentin Docter – CompTIA A+ Complete Study Guide:

“Physical destruction methods like shredding are the most secure options for ensuring data on failed drives cannot be recovered.”

An incident report documents key details such as the cause of the outage, steps taken to resolve it, and measures to prevent recurrence. It is a post-mortem analysis often shared with stakeholders to improve future response.

According to the Quentin Docter – CompTIA A+ Complete Study Guide:

“An incident report provides a summary of an event that disrupted normal operations and includes a timeline of what occurred, how the issue was diagnosed and fixed, and who was involved in the resolution”.

This is reaffirmed in Travis Everett’s All-in-One Guide:

“Documentation after an incident helps technical teams and management review the situation and learn from it. This is formalized in an incident report”.