Data Compression

What is data compression?

• The process of encoding information using fewer bits than the original representation

• The process of decoding information using more bits than the original representation

• The process of encrypting information using complex algorithms

• The process of storing information in a physical format

Why do we need data compression?

• To save storage space and speed up data transmission

• To increase the size of data and slow down data transmission

• To encrypt data for security purposes

• To improve the quality of data

What is lossless compression?

• A compression algorithm that reduces the size of data without any loss of information

• A compression algorithm that reduces the size of data but may result in loss of information

• A compression algorithm that increases the size of data without any loss of information

• A compression algorithm that increases the size of data and may result in loss of information

How does data compression work?

• By finding repeated patterns in the data and replacing them with a smaller placeholder

• By encrypting the data using complex algorithms

• By converting the data into a physical format

• By increasing the size of the data

What is the purpose of space savings in compression?

• To measure how much smaller the compressed data is compared to the original

• To measure the amount of storage space used by the compressed data

• To measure the speed of data transmission

• To measure the quality of the compressed data

Which compression algorithm works well with text that has many repeated characters?

• Run-length encoding

• JPEG

• ZIP

• ASCII

What is the purpose of file extensions in compression?

• To indicate the compression algorithm used for decompression

• To indicate the size of the compressed file

• To indicate the type of data being compressed

• To indicate the speed of data transmission

What happens if a compressed file is decompressed using the wrong algorithm?

• The decompression process fails and the file cannot be opened

• The decompression process succeeds but the file is damaged

• The decompression process succeeds and the file is fully restored

• The decompression process results in a larger file size

Which compression algorithm is not suitable for JPEG files?

• ZIP

• Run-length encoding

• JPEG

• ASCII

What is the main trade-off in data compression?

• Storage space vs computation

• Storage space vs data transmission speed

• Computation vs data transmission speed

• Data transmission speed vs data quality