File Formats & Compression

What is the main purpose of file compression?

• To make files smaller

• To increase file quality

• To make files harder to edit

• To add extra data

Lossy compression removes some data permanently to reduce file size.

• True

• False

Lossless compression keeps how much of the original data after compression?

• 50%

• 75%

• All

• None

Match the file type to its correct category: File Type: JPEG, PNG, MP3, FLAC, MP4 Category: Lossy Image File, Lossless Image File, Lossy Audio File, Lossless Audio File, Lossy Video File

• Lossless Image File

• FLAC

• Lossy Video File

• MP4

• Lossless Audio File

• PNG

• Lossy Image File

• MP3

• Lossy Audio File

• JPEG

Why might a website use JPEG instead of PNG for images?

• JPEG files are smaller, making websites load faster

• PNG files are not supported on websites

• JPEG images have better quality than PNG

• PNG images cannot be compressed

Which file type is BEST for storing a high-quality music file?

• MP3

• WAV

• FLAC

• JPEG

PNG files use lossy compression.

• True

• False

Put the following steps in order for how compression works:

• 2

• Compressed file is saved

• 4

• Redundant data is removed (lossy) or compressed efficiently (lossless)

• 1

• Original file is analyzed

• 3

• File is decompressed when needed

Which file format is best for storing documents that should not be edited but keep formatting?

• DOCX

• TXT

• PDF

• MP4

Students see an image with different file formats and must click on the one that uses lossless compression. Which file format uses lossless compression?

• JPEG

• MP3

• PNG

• GIF