Compression and Cipher Techniques Quiz

What is the primary characteristic of lossy compression techniques?

• They reduce file size without any loss of data.

• They reduce file size by removing some data.

• They increase file size by adding redundant data.

• They encrypt data for security purposes.

Which of the following is a common example of a lossy compression format?

• PNG

• JPEG

• ZIP

• FLAC

What is the main advantage of lossless compression methods?

• They provide better security for data.

• They allow for perfect data reconstruction.

• They are faster than lossy methods.

• They are more suitable for video files.

Which of the following is a lossless compression technique?

• MP3

• GIF

• MPEG

• TIFF

What is the basic principle behind Run Length Encoding (RLE)?

• It replaces frequently occurring data with shorter codes.

• It replaces sequences of identical data with a single value and count.

• It encrypts data using a key.

• It compresses data by removing vowels.

In which scenario is Run Length Encoding most effective?

• When data is highly random.

• When data contains long sequences of repeated values.

• When data is encrypted.

• When data is in binary format.

What is the main concept behind dictionary coding?

• It uses a predefined dictionary to replace data.

• It creates a dictionary of data patterns during compression.

• It compresses data by removing spaces.

• It encrypts data using a cipher.

Which of the following is an example of dictionary coding?

• Huffman Coding

• Lempel-Ziv-Welch (LZW)

• Run Length Encoding

• Caesar Cipher

What is a cipher in the context of data compression?

• A method to reduce file size.

• A technique to encrypt data.

• A way to increase data redundancy.

• A method to convert data into audio.

Which of the following is a characteristic of the Vernam Cipher?

• It uses a fixed key for encryption.

• It uses a one-time pad for encryption.

• It compresses data by removing redundant bits.

• It is a type of lossy compression.