Data Compression Quiz

What is the purpose of compression in data handling?

• To increase the size of data

• To make data transmission more secure

• To reduce the size of data

• To enhance the quality of data

Which of the following is a characteristic of lossy compression?

• It allows the original data to be perfectly reconstructed from the compressed data

• It reduces file size by permanently eliminating certain information

• It is primarily used for text and data files

• It increases the size of the data to improve quality

What is a difference between lossy and lossless compression techniques?

• Lossy compression can be used for executable files, while lossless cannot

• Lossless compression reduces file size without losing any data, while lossy compression does not guarantee this

• Lossy compression is never used in multimedia files, while lossless is commonly used

• Lossless compression is a newer technology compared to lossy compression

Which of the following is a method of lossless data compression?

• MPEG

• JPEG

• Run Length Encoding

• MP3

Huffman coding is used for:

• Lossy compression of images

• Lossless compression of data

• Encrypting data for secure transmission

• Expanding data size for better quality

What is the resolution of a typical HD TV?

• 1280 x 720 pixels

• 1920 x 1080 pixels

• 2560 x 1440 pixels

• 3840 x 2160 pixels

How many pixels are there per frame in a typical HD TV resolution?

• 1,073,741,824 pixels

• 2,073,600 pixels

• 3,145,728 pixels

• 8,294,400 pixels

What is the colour depth used per pixel in a typical HD TV?

• 16 bit

• 24 bit

• 32 bit

• 48 bit

How many bits are there in each frame of a typical HD TV?

• 49,766,400 bits

• 25,000,000 bits

• 75,000,000 bits

• 100,000,000 bits

How many bits per second are typically used for images in films recorded at 24-30 frames per second?

• 1,194,393,600 bits per second

• 500,000,000 bits per second

• 2,000,000,000 bits per second

• 750,000,000 bits per second