HTML5 HTML5 Audio and Video 3

Question 1

What is the Web Audio API primarily used for?

Accepted Answer

Processing and synthesizing audio in the browser with JavaScript

Answer

Playing HTML5 <audio> elements only

Answer

Recording audio from the microphone

Answer

Streaming audio from a server

Question 2

Which API is used to capture audio and video from a user's webcam and microphone?

Accepted Answer

MediaDevices.getUserMedia()

Answer

navigator.getMedia()

Answer

MediaStream.capture()

Answer

Camera.access()

Question 3

What does the MediaRecorder API enable in HTML5?

Accepted Answer

Recording audio/video streams directly in the browser

Answer

Playing back recorded media files

Answer

Capturing canvas frames as video

Answer

Streaming media to a remote server

Question 4

Which video codec is widely supported by HTML5 browsers and uses the .mp4 container?

Accepted Answer

H.264 (AVC)

Answer

Theora

Answer

VP8

Answer

AV1

Question 5

What event fires on an HTML5 media element when playback has reached the end?

Accepted Answer

ended

Answer

complete

Answer

finish

Answer

stop

Question 6

What does the 'poster' attribute on an HTML5 <video> element specify?

Accepted Answer

An image to display before the video plays

Answer

The video's thumbnail in search results

Answer

A fallback audio track

Answer

The video's aspect ratio