Which of the following file formats exclusively contain sound and are…
2022
Which of the following file formats exclusively contain sound and are appropriate for web distribution?
(A) WMV
(B) WAV
(C) AVI
(D) MOV
(E) MP3
Choose the correct answer from the options given below:
Answer: B. B and E only — ConceptA file extension generally signals a storage or container format, while the bytes must still conform to that format. An audio-only format stores an…
- A.
B and C only
- B.
B and E only
- C.
A and D only
- D.
A and E only
Show answer & explanation
Correct answer: B
Concept
A file extension generally signals a storage or container format, while the bytes must still conform to that format. An audio-only format stores an audio signal, whereas a multimedia container may carry video, audio, and other streams.
Application
Classify each listed format by what its container can hold:
WMV is a Windows Media video/container format and may include both video and audio.
WAV is an audio waveform container that commonly stores uncompressed PCM sound, although it can also carry compressed audio.
AVI is a multimedia container and can carry video together with audio.
MOV is a multimedia container and can carry video together with audio.
MP3 is a compressed digital-audio format and is widely suitable for web distribution.
Contrast
B and C combines the audio-only WAV format with the multimedia AVI container.
B and E combines the two audio-only formats, WAV and MP3.
A and D combines two multimedia/video containers, WMV and MOV.
A and E combines the multimedia/video WMV format with the audio-only MP3 format.
Cross-check
Only labels B and E both satisfy the audio-only test. WAV in its common PCM form and MP3 are supported by modern browsers for web audio; WAV is comparatively large, while MP3 is compressed and widely used for web delivery. Therefore, the required combination is B and E only.