Terminology
OS Features
Permissions and Security
File Properties
The Big Picture
100

A label describing the kind of data in a file, such as text, image, or video.

What is a file type?

100

The process of reducing file size to save space or speed up transfers.

What is compression? 

100

In Windows, this specific permission allows a user to view files and subfolders.

What is the "Read" permission?

100

The part of a file name after the dot that tells the OS which program should open it.

What is a file extension?

100

The "root directory" designation used by Linux devices.

What is the forward slash (/)?

200

Information and data that describes other data; essentially "data about data."

What is metadata

200

This feature helps protect data during a crash by recording file changes in a special log.

What is journaling? 

200

The three sets of permissions (rwx) used by Linux and macOS.

What are Read, Write, and Execute?

200

A type of metadata that determines how a file/folder is treated by the OS, such as "Hidden" or "Read-only."

What are file attributes?

200

This filesystem is the modern standard for Windows and supports permissions and journaling.

What is NTFS?

300

The smallest unit of a filesystem that serves as a container for data.

What is a file?

300

This method protects data by converting it into unreadable code unless a key is used.

What is encryption?

300

A specific Windows attribute that prevents a file from being edited or deleted.

What is the "Immutable" attribute?

300

These are metadata details a user usually sees, like file size and timestamps.

What are file properties?

300

This filesystem is used specifically for media discs like DVDs and Blu-rays.

What is UDF (Universal Disk Format)?

400

The topmost directory in a file hierarchy system.

What is the root directory?

400

A compression type that removes some data permanently to reduce file size.

What is lossy compression?

400

This Windows-specific permission allows a user to change file permissions for others.

What is "Full Control"?

400

The maximum character length for a filename in most Windows cases.

What is 255 characters?

400

Why zipping a JPEG file typically offers little to no reduction in size.

What is because the file is already compressed?

500

An encryption method that uses two keys: a public key to encrypt and a private key to decrypt.

What is asymmetric encryption?

500

The type of allocation method common in modern filesystems that uses an index block.

What is indexed allocation?

500

This Windows encryption feature ties file access directly to a specific user account.

What is EFS (Encrypting File System)?


500

A special character forbidden in Linux filenames to prevent confusion with the root directory.

What is the forward slash (/)?

500

A legacy filesystem limited to 4 GB files that does not support journaling.

What is FAT32?