Character Storage - Year 9

What is a character set and why are they needed?

• A method to increase the speed of typing.

• A specific font style used in programming.

• A security protocol for character encryption.

• A table that matches characters to their binary values, allowing for data exchange and input.

Describe 3 differences between ASCII and Unicode.

• ASCII uses 1 byte, Unicode uses 2 bytes; ASCII has 256 characters, Unicode has 65,536; Unicode supports more languages.

• Unicode uses less memory than ASCII.

• ASCII supports more characters than Unicode.

• ASCII and Unicode are the same in terms of memory usage and character support.

The binary code for the character P in ASCII is 01010000. What would the binary code for the character S be?

• 01001111

• 01010010

• 01010100

• 01010011

A text file uses the ASCII character set and contains 400 characters. What would the file size be in kilobytes?

• 0.4 kilobytes

• 0.3 kilobytes

• 0.5 kilobytes

• 1 kilobyte

A text file uses the Unicode character set and contains 150 characters. What would the file size be in kilobytes?

• 0.75 kilobytes

• 0.6 kilobytes

• 0.15 kilobytes

• 0.3 kilobytes

Why does Unicode require more memory to store each character than ASCII?

• Unicode and ASCII use the same amount of memory.

• Due to its compatibility with more languages, not memory usage.

• It actually uses less memory than ASCII.

• Because it uses an extra byte for each character.

How many possible characters can ASCII represent?

• 128

• 65,536

• 1024

• 256

How is the file size of a text file calculated?

• Characters divided by bits

• Bytes per character plus the number of characters

• Bits per character multiplied by the number of characters

• Number of characters divided by 8

What allows different languages to be represented in Unicode?

• The inclusion of language-specific punctuation

• A special compression algorithm

• Unicode's compatibility with ASCII

• The use of 2 bytes (16 bits) for each character

Why can't ASCII be used for all languages?

• ASCII is only designed for the English language.

• It only supports 256 characters, insufficient for many languages.

• ASCII is outdated and no longer in use.

• It can be used for all languages; it's a universal standard.