Information representation: Practice Questions

• a.

  The file size decreases and the dynamic range of the sound improves.

• b.

  The sound is converted from mono to stereo, doubling the storage requirement.

• c.

  The number of bits used per sample increases, allowing for more volume levels.

• d.

  The file size increases and the accuracy of the sound representation improves.

• a.The image representation consists of a file header followed by a sequence of binary pixel data.
• b.Increasing the size of the image causes the individual pixels to become visible, resulting in a loss of quality.
• c.The file size is directly determined by the number of pixels and the color depth of the image.
• d.The data is stored as a drawing list, where each item is defined by its geometric properties and attributes.

• a.The result is stored as \( 0_{10} \) because the subtraction of two equal magnitudes in a 10-bit system always results in a carry-out that is discarded.
• b.An arithmetic overflow occurs because the mathematical result is \( 512_{10} \), which exceeds the maximum positive value of \( 511_{10} \) representable in this format.
• c.The result is stored as \( -512_{10} \) and the overflow flag is not set because the resulting bit pattern \( 1000000000_{2} \) is within the valid representable range of the register.
• d.The result is \( 512_{10} \) and is stored correctly because a 10-bit register can represent unsigned values up to \( 1023_{10} \).

• a.ASCII and Unicode are identical in the way they represent non-English alphabets such as Cyrillic or Kanji.
• b.Unicode is a lossy method of character encoding designed to save space, while ASCII is a lossless method.
• c.ASCII uses 16 bits per character to allow for international symbols, whereas Unicode is restricted to 7 or 8 bits.
• d.Unicode can represent a much larger range of characters and symbols from many different languages compared to standard ASCII.

• a.

  It replaces binary mapping with vector-based drawing lists for every character in the set.

• b.

  It applies lossy compression to character bit-patterns, allowing more symbols to be stored in the same space as ASCII.

• c.

  It restricts every character to a 7-bit code to maximize compatibility with legacy communication protocols.

• d.

  It uses a larger bit depth per character (such as 16 or 32 bits) or variable-width encoding, providing over a million unique code points.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.