A-level RLE and Dictionary-based compression

What are the two main types of data compression?

• Lossy and lossless
• Binary and decimal
• Static and dynamic
• Compressed and uncompressed

How does the efficiency of Dictionary Coding compare to Run-Length Encoding?

• Dictionary Coding is always faster
• Run-Length Encoding is more efficient for text
• Dictionary Coding is more efficient for text-based documents
• Both methods are equally efficient

Which method is best suited for compressing text-based documents?

• JPEG Compression
• ZIP Compression
• Dictionary Coding
• Run-Length Encoding

What is the primary advantage of lossless compression methods?

• They are faster than lossy methods
• They reduce file size without losing quality
• They can only compress text
• They require less memory

Which of the following statements about lossless compression is true?

• It loses some data during compression
• It can recreate the original file perfectly
• It is only used for images
• It is slower than lossy compression

What is a common misconception about lossless compression?

• It always reduces file size
• It is faster than lossy compression
• It loses some data
• It cannot be used for images

Which of the following best describes how Dictionary Coding works?

• It only works with audio files
• It compresses images by removing colors
• It builds an index visualized as a table
• It uses a single character for each pixel

How does Dictionary Coding create a compressed file?

• By using a single character for each word
• By building an index and a sequence of occurrences
• By removing all vowels
• By converting text to binary

How is data stored in Dictionary Coding?

• As a sequence of characters
• As a single compressed file
• As a series of images
• As a dictionary index and a sequence of occurrences

What is the significance of storing each number in binary after compression?

• It complicates the compression process
• It allows for efficient storage and retrieval
• It makes the file larger
• It is not necessary