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NTFS stands for New Technology File System and it is the preferred filesystem for Microsoft Windows OS since Windows NT 3.1 in 19931. NTFS replaced FAT (File Allocation Table) as the default filesystem for Windows because it offers many advantages over FAT, such as:

Support for larger volumes and files (up to 16 exabytes)2

Support for file compression, encryption, and permissions2

Support for journaling, which records changes to the filesystem and helps recover from errors2

Support for hard links, symbolic links, and mount points2

Support for long filenames and Unicode characters2

FAT32 is an improved version of FAT that supports larger volumes and files (up to 32 GB and 4 GB respectively) and is compatible with older versions of Windows and other operating systems3. However, FAT32 still has many limitations and drawbacks compared to NTFS, such as:

No support for file compression, encryption, and permissions3

No support for journaling, which makes it vulnerable to corruption and data loss3

No support for hard links, symbolic links, and mount points3

No support for long filenames and Unicode characters3

APFS (Apple File System) is the default filesystem for macOS, iOS, iPadOS, watchOS, and tvOS since 20174. APFS replaced HFS+ (Hierarchical File System Plus) as the preferred filesystem for Apple devices because it offers many advantages over HFS+, such as:

Support for larger volumes and files (up to 8 zettabytes)4

Support for file cloning, snapshots, and encryption4

Support for space sharing, which allows multiple volumes to share the same storage pool4

Support for fast directory sizing, which improves performance and efficiency4

ext4 (Fourth Extended Filesystem) is the default filesystem for most Linux distributions since 20085. ext4 replaced ext3 as the preferred filesystem for Linux because it offers many advantages over ext3, such as:

Support for larger volumes and files (up to 1 exabyte and 16 terabytes respectively)5

Support for extents, which reduce fragmentation and improve performance5

Support for journal checksumming, which improves reliability and reduces recovery time5

Support for delayed allocation, which improves efficiency and reduces metadata overhead5

A PowerShell script is a plain text file that contains one or more PowerShell commands. Scripts have a .ps1 file extension and can be run on your computer or in a remote session. PowerShell scripts can be used to automate tasks and change settings on Windows devices. To create and run a PowerShell script, you need a text editor (such as Visual Studio Code or Notepad) and the PowerShell Integrated Scripting Environment (ISE) console. You also need to enable the correct execution policy to allow scripts to run on your system

To change the wallpaper on a Windows 10 laptop, the "Personalization" settings should be used. These settings allow users to customize themes, which include various aspects of the desktop environment such as the desktop wallpaper, screen saver, color scheme, and more. This makes "Personalization" the correct option for customizing the wallpaper.References: Official CompTIA A+ Core 1 and Core 2 Student Guide​​.

Removing the power cord is the first step to ensure the safety of the technician and the PC components. This will prevent any electrical shock or damage that may occur if the PC is still connected to a power source. The technician should also press the power button to drain any residual power from the capacitors.