curriculum/challenges/english/blocks/quiz-javascript-audio-and-video/66edd3b3096349f06cf688bb.md
To pass the quiz, you must correctly answer at least 18 of the 20 questions below.
What is the purpose of the Audio() constructor in JavaScript?
Create a new audio file.
Play an existing audio file.
Modify audio files.
Create a new audio element.
Which method is used to begin playback of an audio or video element?
start()
begin()
resume()
play()
What is the difference between pause() and play() methods for media elements?
pause() returns a Promise while play() does not.
pause() cannot be resumed while play() can start from any position.
pause() automatically resets to the beginning while play() starts from where the audio was paused.
pause() stops playback but maintains the current position while play() starts playback.
Which audio format has the widest browser support?
FLAC
OGG
WAV
MP3
What is the purpose of the source element within an audio or video element?
Specify the volume of the media.
Add subtitles to the media.
Link to an external audio processor.
Specify multiple media sources for different formats.
What are the two possible MIME types an MP4 format can have?
mp4/audio and mp4/video
audio/mpeg4 and video/mpeg4
mp4/mpeg and mp4/stream
audio/mp4 and video/mp4
What does a codec do in the context of audio and video?
Increases the volume of the media.
Changes the file format of the media.
Encrypts the media for secure transmission.
Converts media between analogue and digital formats.
Which API provides a way to create, process, and analyze audio in web applications?
Audio Processing API.
Sound Manipulation API.
Media Stream API.
Web Audio API.
What is the purpose of the getUserMedia() method?
Authenticate users with a media service.
Retrieve user preferences for media playback.
Download media files to the user's device.
Access the user's camera and/or microphone.
Which property of the HTMLMediaElement interface represents the current playback time?
time
playbackPosition
currentPosition
currentTime
What does the following code snippet do?
const audio = new Audio('song.mp3');
audio.loop = true;
Plays the audio file once.
Increases the volume of the audio.
Pauses the audio after one loop.
Sets the audio to repeat indefinitely.
What is the full meaning of MIME?
Multiple Internet Message Extensions
Mail Internet Multimedia Extensions
Multimedia Internet Mail Extensions
Multipurpose Internet Mail Extensions
What does the canPlayType() method help you do?
Check if audio is currently playing in the browser in a specific format.
Verify if a media file exists in the browser's cache and accessible for playback.
Test if an audio element has controls enabled and whether the user has appropriate permissions to interact with it.
Determine if a browser is likely to be able to play your specific audio format.
Which of the following is NOT a valid event of the HTMLMediaElement API?
waiting
canplay
ended
stopped
What HTMLMediaElement event fires when playback is paused due to data buffering?
stopped
pause
buffering
waiting
Which Web Audio API interface is used to represent an audio-processing graph?
AudioNode
AudioBuffer
AudioListener
AudioContext
What is the purpose of the Media Source Extensions API?
Add visual effects to video.
Convert between different media formats.
Enable JavaScript to synchronize multiple audio tracks.
It lets you directly pass a user's webcam feed to a video element
When is the ended event fired?
When the media source is changed.
When the pause() method is called.
When the media is manually stopped.
When the end of the media has been reached.
How is the Screen Capture API exposed?
Through the window.screenCapture interface
By using the navigator.capture property
By using the captureScreen() method
By calling the getDisplayMedia() method.
What is the WMV format associated with?
Wide Media Video
World Media Video
Web Media Player
Windows Media Player