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Free Practice Quiz Question List

6 Compression and Media Optimization Online Quiz Questions

Use this free practice quiz with 20 questions to review 6 Compression and Media Optimization, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

After lossless compression is decompressed, does the data match the original exactly?

  1. A

    True

  2. B

    False

02
True or false
1 point

Can WebP support both lossy and lossless compression modes?

  1. A

    True

  2. B

    False

03
Choose one
1 point

You are exporting a logo and diagram whose text and edges must remain sharp. Which approach best fits that purpose?

  1. A

    Use stronger lossy compression because logos contain few colors.

  2. B

    Use lossless compression to preserve sharp edges.

  3. C

    Use the smallest available file, regardless of visible artifacts.

  4. D

    Re-encode the image repeatedly until it is as small as possible.

04
Choose one
1 point

Which statement best distinguishes a media format from a codec?

  1. A

    A format is an encoding method, while a codec is the file’s name suffix.

  2. B

    A format organizes data and related information; a codec encodes and decodes media.

  3. C

    A codec determines the file extension, which always reveals the compression mode.

  4. D

    A format and a codec mean the same thing, so either term describes both.

05
True or false
1 point

True or false: Any file made with lossy compression will necessarily look or sound poor.

  1. A

    True

  2. B

    False

06
Written response
1 point

What type of compression permanently discards some information to reduce file size?

07
Choose one
1 point

A website displays an image at a much smaller size than its original dimensions. Which optimization step is most appropriate?

  1. A

    Keep every image at its maximum possible dimensions.

  2. B

    Use dimensions close to the image’s actual display size.

  3. C

    Increase dimensions before applying any compression.

  4. D

    Remove transparency from every image to reduce its dimensions.

08
Fill in the blank
1 point

Lossy compression reduces file size by .

09
Fill in the blank
1 point

Keep an editable or high-quality original separate, and treat optimized exports as .

10
Written response
1 point

Which video setting is often raised to improve clarity, usually increasing file size?

11
Choose one
1 point

An optimized video must play on a particular device. What should guide your format choice?

  1. A

    Choose the format that creates the smallest file, even if the device cannot play it.

  2. B

    Use the highest quality setting available, regardless of the audience’s needs.

  3. C

    Choose a suitable format that is compatible with the intended software or device.

  4. D

    Convert every media file to the same format before checking compatibility.

12
Choose all
1 point

Which of these are common examples of media that use lossy compression? Select all correct choices.

  1. A

    JPEG images

  2. B

    PNG images

  3. C

    MP3 audio

  4. D

    Most video distributed for everyday playback

  5. E

    FLAC audio

13
Choose all
1 point

When adjusting lossy export quality, which practices support an informed decision? Select all correct choices.

  1. A

    Adjust the quality gradually and export a test.

  2. B

    Inspect or listen to the test under its intended playback conditions.

  3. C

    Repeat generic compression until no further reduction is possible.

  4. D

    Compare the test’s quality and file size with the source.

14
Open ended
1 point

You need to prepare a large photograph for a webpage. The image should load efficiently but remain clear at its displayed size. Describe an optimization approach that balances file size and quality while protecting the original.

15
Choose one
1 point

Which practice helps prevent additional quality loss when making delivery copies from already-lossy media?

  1. A

    Repeatedly re-encode the already-lossy delivery copy.

  2. B

    Keep the original or high-quality master and export delivery copies from it.

  3. C

    Use stronger lossy compression on the master before making each copy.

  4. D

    Discard the master once the first delivery copy has been made.

16
Choose one
1 point

A photograph must load quickly on a website, and a modest reduction in detail is acceptable if the image still looks clear. Which approach best fits this goal?

  1. A

    Use lossy compression and check that the result remains clear enough for viewers.

  2. B

    Use lossless compression because photographs cannot be compressed lossily.

  3. C

    Use the strongest possible compression without checking the result.

  4. D

    Re-encode the photo repeatedly to restore details while reducing its size.

17
Written response
1 point

A media file's format is compatible with a device, but you need to identify the method used to encode and decode its media. What is that method called?

18
Written response
1 point

After a video is compressed more strongly, viewers notice blockiness and blurred edges. What general term describes these unwanted effects?

19
Choose one
1 point

Which action can remove unnecessary data when optimizing an audio or video file?

  1. A

    Add unused sections to the beginning and end of the media.

  2. B

    Increase the duration even when those sections are not needed.

  3. C

    Trim unused sections of the audio or video when appropriate.

  4. D

    Re-encode the full file repeatedly without removing any content.

20
Choose one
1 point

What is a common tradeoff when raising a video's bitrate?

  1. A

    Raising video bitrate always reduces file size without affecting clarity.

  2. B

    Raising video bitrate often improves clarity but increases file size.

  3. C

    Lowering video bitrate always improves clarity and increases file size.

  4. D

    Video bitrate has no relationship to clarity or file size.