Understanding Lossless Compression

What is lossless compression?

• Lossless compression results in some loss of information.

• Lossless compression increases data size while preserving quality.

• Lossless compression is a method of reducing data size by removing unnecessary data.

• Lossless compression is a method of reducing data size without any loss of information.

Name one common lossless compression algorithm.

• Huffman

• Run-Length Encoding

• LZW

• DEFLATE

How does lossless compression differ from lossy compression?

• Lossless compression reduces file size without any data loss, while lossy compression retains all data.

• Lossless compression retains all original data, while lossy compression sacrifices some data for reduced file size.

• Lossless compression is used exclusively for audio files, while lossy compression is for images.

• Lossless compression is faster than lossy compression in processing files.

What is the main advantage of using lossless compression?

• It allows for easier editing of the original data.

• The main advantage of using lossless compression is that it preserves the original data without any loss.

• It reduces the file size significantly at the cost of some data loss.

• It is faster than lossy compression methods.

Can you give an example of a file type that typically uses lossless compression?

• JPEG

• MP3

• PNG

• GIF

What is the role of Huffman coding in lossless compression?

• Huffman coding is used for lossy compression of audio files.

• Huffman coding reduces the size of data by using variable-length codes for characters based on their frequency, enabling lossless compression.

• Huffman coding only works with binary data and cannot compress text.

• Huffman coding increases data size by using fixed-length codes for all characters.

Explain the concept of run-length encoding.

• Run-length encoding is a compression technique that replaces sequences of the same data value with a single value and a count.

• Run-length encoding compresses data by removing all duplicates.

• Run-length encoding is a method for encrypting data.

• Run-length encoding is a technique for sorting data values.

What is the purpose of the Lempel-Ziv-Welch (LZW) algorithm?

• To encrypt data securely.

• To analyze data patterns.

• To compress data efficiently.

• To sort data in ascending order.

How does lossless compression affect file size?

• Lossless compression increases file size and loses some data.

• Lossless compression has no effect on file size.

• Lossless compression decreases file size while preserving all original data.

• Lossless compression only works on image files.

What are some applications of lossless compression in real-world scenarios?

• Video streaming services

• Image formats like JPEG

• Text file encryption

• Applications of lossless compression include text file storage, image formats like PNG, audio formats like FLAC, and database backups.