1. What is the main purpose of post-production in media content creation?
To sell the finished film to broadcasters
To write the script and plan the shoot schedule
To build cameras and microphones
To assemble and refine recorded footage and audio into the final programme
Explanation:
Post-production is the stage after shooting where editors assemble clips, fix audio, add effects, titles and colour to produce the finished media piece.
2. What does 'non-linear editing' (NLE) mean?
Editing digitally where you can access and rearrange any clip at any time
Printing frames on paper to paste together
Recording audio live into the final video file
Editing only on tape from start to end in order
Explanation:
Non-linear editing lets editors jump to and change any part of the timeline without affecting the source files, unlike old linear tape editing.
3. Which software is a popular free option for video editing and colour grading that students can use?
Notepad
DaVinci Resolve
Microsoft Word
VLC Media Player
Explanation:
DaVinci Resolve offers a free version with professional editing and colour tools suitable for students; the others are not full video editing suites.
4. What is the difference between colour correction and colour grading?
Colour grading fixes colour issues; colour correction adds titles
Colour correction is used only for audio
Colour correction fixes colour issues; colour grading creates the final visual style
Both terms mean adding subtitles to a video
Explanation:
Correction makes clips look natural and consistent (fix white balance, exposure). Grading applies a look or mood to the whole piece.
5. In an editing program, what is the 'timeline'?
A list of all equipment used on set
A website that shows historical films
A printed schedule of shooting days
The area where video and audio clips are placed and arranged in time
Explanation:
The timeline is the central workspace in an NLE where clips are sequenced, layered on tracks and edited along a time axis.
6. What is a keyframe used for in post-production?
To set a point where a parameter (like position or opacity) changes over time
To cut a clip into two separate files permanently
To record audio on location
To export the final video to YouTube
Explanation:
Keyframes mark where a value begins or ends; the software interpolates between them to animate effects, motion, or audio levels.
7. Why is a proxy workflow used in video editing?
To compress the final exported video into a ZIP archive
To transfer files directly to social media without editing
To convert audio files into MIDI
To edit using low-resolution copies so playback is smoother, then relink to high-resolution files before export
Explanation:
Proxies are lighter files created for smooth editing on slow computers; you switch back to the original high-res media for final rendering.
8. What is chroma key (green screen) used for in post-production?
To remove a uniform coloured background (often green or blue) so another image or video can be placed behind the subject
To increase the audio volume automatically
To convert footage from colour to black and white
To stabilise shaky camera motion
Explanation:
Chroma keying isolates and removes a single colour background to composite subjects into different environments or effects.
9. What is a LUT (Look-Up Table) in colour work?
A preset that remaps colours to create a consistent look across clips
A file that contains subtitles for a video
A type of transition between clips
An audio filter to remove background noise
Explanation:
LUTs transform colour values to apply a particular look quickly and consistently during grading or previewing.
10. What does 'audio ducking' do?
Converts audio from mono to stereo
Makes the audio sound like a duck
Removes all silence from a recording
Automatically lowers background music or sound when dialogue or a main audio track is present
Explanation:
Ducking reduces competing sounds so speech remains clear without manually adjusting levels constantly.
11. What does 'transcoding' mean in post-production?
Shooting extra footage on set
Converting a media file from one codec or container format to another
Mixing multiple audio tracks into one stereo file
Adding text titles to a video
Explanation:
Transcoding changes the encoding or container to improve compatibility, reduce size, or prepare files for editing or playback.
12. Which export format is widely recommended for uploading finished videos to platforms like YouTube?
MP4 using H.264 codec
TIFF image sequence
WAV audio only
DOCX document
Explanation:
MP4 with H.264 balances good quality and small file size and is supported by most online platforms including YouTube.
13. How does increasing video bitrate affect the exported file?
It always makes the file play on slower phones
It adds subtitles automatically
It changes the video aspect ratio
It generally increases video quality and also increases file size
Explanation:
Bitrate controls how much data per second is used; higher bitrate preserves more detail but creates larger files.
14. What does it mean to 'render' a sequence in video editing?
To move files into the trash
To upload the raw clips from the camera
To record actors on set
To create the final video by processing effects, transitions and layers into a finished file
Explanation:
Rendering computes all applied changes so the video can be played smoothly as a complete rendered output.
15. What is 'aspect ratio' in video?
The proportional relationship between width and height of the image (for example 16:9)
The number of audio channels in the file
The total length of the video in minutes
The camera's brand and model
Explanation:
Aspect ratio defines the shape of the image frame; common ones are 16:9 for widescreen and 4:3 for older TV.
16. Which frame rate is most appropriate for television broadcast in Kenya (PAL regions)?
25 frames per second
30 frames per second
24 frames per second
60 frames per second
Explanation:
Countries using PAL broadcast standards, like Kenya, commonly use 25 fps for smooth playback and broadcast compatibility.
17. What are timeline markers used for in editing?
To convert video into audio
To permanently delete sections of video from the original file
To mark important points in the timeline such as edit points, sync points or notes for collaborators
To change the frame rate of the clip automatically
Explanation:
Markers are non-destructive flags used to indicate where changes, cuts, or comments are needed during editing.
18. What does an 'alpha channel' represent in video files?
A copy of the colour grade
The file's subtitle stream
An extra audio track for the narrator
Transparency information for pixels (which areas are see-through)
Explanation:
Alpha channels store transparency so elements can be composited over other images while preserving see-through areas.
19. What is meant by 'non-destructive editing'?
Saving over the original clips so only the edited version remains
Burning the footage to DVD immediately after editing
Editing where the original media files are not altered; edits are stored as instructions
Deleting all unused clips after every edit
Explanation:
Non-destructive workflows keep source files intact and let you undo or change edits because the NLE only references originals.
20. What is a crossfade transition commonly used for?
To smoothly blend audio or video from one clip into another
To change the camera lens focus
To instantly cut away to a new scene with no blending
To remove background noise from audio
Explanation:
Crossfades create a gradual visual or audio transition that avoids jarring cuts and helps with pacing or mood.
21. How do editors usually sync separately recorded audio and video?
By colour grading both files the same
By converting audio to mono only
By exporting the video first and then adding audio later without alignment
By using a clapperboard or matching the audio waveforms to align the clips
Explanation:
A clapper provides a clear sync point; waveform matching visually aligns peaks when separate audio was recorded.
22. What does audio noise reduction aim to do in post-production?
Increase the pitch of the speaker's voice
Reduce background hiss, hum or constant noise while keeping the dialogue clear
Convert dialogue to another language automatically
Add reverb to make the audio sound like a concert
Explanation:
Noise reduction targets unwanted constant sounds so speech becomes clearer, but it must be used carefully to avoid artefacts.
23. Which is a good practice when creating subtitles for a video?
Use a clear, readable font and place subtitles so they don't cover important faces or on-screen information
Use decorative fonts for each sentence to be creative
Use very small, light-coloured text placed randomly
Put as many words per line as possible to save space
Explanation:
Readable fonts, proper size and placement improve viewer comprehension and avoid covering key visual elements.
24. What is a widely recommended backup strategy for media files during post-production?
Keep only one copy on the editorβs laptop to save space
Email every clip to a friend as the only backup
Rely solely on the camera's internal storage forever
The 3-2-1 rule: keep three copies, on two different types of media, with one copy stored offsite
Explanation:
The 3-2-1 rule reduces risk of data loss by having multiple copies across media and locations, which is best practice in post.
25. What is a 'render farm' used for in post-production and VFX?
A single laptop used to edit small clips
A cluster of computers that work together to render (process) video or effects faster
A farm where actors rehearse outdoor scenes
A storage cupboard on set for batteries
Explanation:
Render farms distribute heavy rendering tasks across many machines to shorten processing time for complex projects.