File Formats and Compression Quiz

Which of the following is TRUE about lossless compression technique?

• The file cannot be reconstructed back to its original form.

• The quality of the file remains the same after compression.

• The memory required to store the file after compression remains the same.

• All of the above

Which of the following is TRUE about lossy compression technique?

• The quality of the file remains the same after compression.

• The memory required to store the file after compression remains the same.

• The unnecessary bits of information are removed permanently.

• All of the above

What is the function of compression?

• Reducing the file size

• Increasing the file quality

• Converting analogue signals to digital files

• All of the above

Which of the following file formats are used to store animated graphics?

• PNG

• JPEG

• GIF

Which of the following file formats is a lossless compression technique?

• PNG

• JPEG

• Bitmaps

Which of the following is a lossy compression technique?

• FLAC

• ALAC

• MP3

• All of the above

At what speed is a high-definition video streamed online?

• 1200 kbps

• 3 Mbps

• 320 kbps

Which of the following is NOT true about a MIDI file?

• It can instruct up to 16 devices at a time.

• A MIDI file is larger in size compared to an MP3 file.

• It instructs instruments using commands.

What parameter(s) of a video file can be changed to compress it?

• Resolution

• Dimensions

• Bit rate

• All of the above

What is an artefact?

• Random coloured blocks in video due to compression

• Programs that encode or decode an audio, image or video file

• Compression algorithm used to reduce file size without affecting file quality