Characters

• What can be represented as binary code?

  Everything can be represented as binary code
• How can words be represented in binary?

  Words can be represented as binary code-words
• What types of characters are included in binary representation?

  Alphanumeric characters, digits, and symbols
• Why can't computers process characters directly?

  They can only process binary code directly
• How do computers convert characters to binary code?

  By using character sets to convert characters
• What are character sets in computing?

  • Collections of characters
  • Used for computer recognition
  • Determine how characters are represented
• How many bits does each ASCII character use?

  Each ASCII character uses 7 bits
• How many different characters can be represented by ASCII?

  ASCII can represent 128 different characters
• What types of characters does ASCII include?

  Letters, numbers, symbols, and control characters
• What does pressing a button on the keyboard send to the computer?

  A binary signal indicating the pressed key
• What does the computer do with the binary signal from the keyboard?

  It translates the binary code into a character
• What determines how many bits are needed for a character?

  The character set determines the number of bits
• What can different character sets have?

  Different amounts of characters represented
• What is the total number of characters ASCII can represent?

  ASCII can represent a total of 128 characters
• What types of characters are included in the English alphabet in ASCII?

  All letters in the English alphabet
• What additional characters does ASCII include besides letters?

  Numbers and symbols
• What is the significance of the 7-bit binary code in ASCII?

  It allows representation of 128 characters
• How does the number of bits affect character representation?

  More bits allow for more characters
• What is the relationship between character sets and fonts?

  Character sets determine the characters in fonts
• What is the purpose of a character set?

  To define how characters are represented
• What does the term "binary code" refer to?

  A system of representing data using two states
• What is the main function of a computer regarding characters?

  To recognize and process characters as binary
• How does the computer translate binary code into characters?

  By using character sets for translation
• What happens when you press a key on the keyboard?

  A binary signal is sent to the computer
• What is the significance of the number of bits in character representation?

  It determines how many characters can be represented
• What is the total number of different characters ASCII can represent?

  ASCII can represent 128 different characters
• What are commonly used characters set in?

  English-speaking world
• How many bits are used for each ASCII character?

  7-bit binary code
• How many different characters can be represented by ASCII?

  128 different characters
• What types of characters are included in ASCII?

  Letters, numbers, symbols, and commands
• What is added to the start of the binary code for each ASCII character?

  An extra bit (0)
• What does the extra bit in ASCII signify?

  It allows fitting into 1 byte
• How are the codes for numbers and letters ordered in ASCII?

  Numbers before uppercase letters
• What is the significance of the character backspace in ASCII?

  It is used to delete the previous character
• What are the main features of Unicode compared to ASCII?

  • Covers all major languages
  • Uses multiple bytes per character
  • Supports a wider range of symbols
• How many codes in Unicode are the same as ASCII?

  The first 128 codes are the same
• How can you calculate the size of a text file using ASCII?

  Size = bits per character x number of characters
• If a text file uses 8 bits per character and contains 200 characters, what is its size?

  $1600 \text{ bits}$
• What are the advantages and disadvantages of using ASCII and Unicode?

  Advantages of ASCII:

  • Simple and easy to use
  • Requires less storage space

  
  

  Disadvantages of ASCII:

  • Limited to 128 characters
  • Cannot represent all languages

  
  

  Advantages of Unicode:

  • Supports all languages
  • Can represent a vast array of symbols

  
  

  Disadvantages of Unicode:

  • Requires more storage space
  • More complex to implement