Quiz Video Studio: Sync & Rendering
Test your understanding of audio-video synchronization, deterministic rendering, and safe improvements to a browser-based quiz studio.
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: Which clock should serve as the timing reference for synchronized audio and video?
The browser's animation timer
The system wall clock
The download progress timer
The master AudioContext clock
Question 2: Why can real-time recording create audio-video drift?
Saving questions in folders
Frame drops or processing lag
Showing answer choices on screen
Using a dark interface theme
Question 3: Which approach best avoids timing changes caused by real-time lag?
Record only when the tab is active
Render offline, frame by frame
Play the audio after downloading
Increase the animation speed
Question 4: A tick sound plays late after a dropped frame. What design change most directly addresses this?
Move the sound effect into the question text
Add more animation frames
Make the tick louder
Schedule the sound against the master audio clock
Question 5: What is the safest response to unreliable experimental WebCodecs features?
Keep it and ignore any errors
Use it only for sound effects
Remove it or replace it with a reliable implementation
Disable all video rendering
Question 6: Which maintenance practice helps reduce render-time lag and memory leaks?
Keep every temporary object indefinitely
Remove unnecessary repeated work and clean up resources
Add more timers to the render loop
Render every frame several times
Question 7: Which change respects the brief's requirement to preserve the existing studio experience?
Replace the dark theme with a blank page
Disable sound effects during rendering
Fix synchronization while keeping the UI and editor intact
Remove question entry and folder organization
Question 8: Why should a synchronization fix preserve both tick and correct-answer sounds?
Sound effects do not need timing alignment
Correct-answer sounds are part of the video image
Both are audio events that must align with video frames
Only the tick sound affects frame timing