Compression

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
• All of the above

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

• PNG
• JPEG
• Bitmaps
• All of the above

Which of the following is a lossy compression technique?

• FLAC
• TIFF
• MP3
• All of the above

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

• 1200kbps
• 3Mbps
• 320kbps
• 2bps

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 an audio, image or video file
• Compression algorithm used to reduce file size without affecting file quality
• Programs that decode an audio, image or video file

Which of the following requires the highest amount of data transmission rate?

• Watching an SD video through online streaming
• Telephone calls over the Internet
• Listening to music online
• Watching an HD video through online streaming