CompTIA IT Fundamentals (FC0-U51) — Question 5

Which of the following extensions identifies a video file?

Answer options

• A. .msi
• B. .tar
• C. .img
• D. .mp4

Correct answer: D

Explanation

.mp4 is a widely used video file format that supports high-quality video and audio. The other options, such as .msi (a Windows installer package), .tar (a tape archive format), and .img (a disk image), do not pertain to video files.