Optical Scanners: OMR (Optical Mark Reader)
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Questions and Answers

What is the key idea behind the BCD code?

  • Representing characters using 4-bit binary codes
  • Representing 64 characters using a 6-bit code
  • Representing the entire decimal number in binary form
  • Representing each decimal digit independently in binary form (correct)
  • What does BCD stand for?

  • Binary Coded Descriptor
  • Binary Coded Decimal (correct)
  • Binary Coded Digit
  • Binary Coded Data
  • How many bits are used to represent a single decimal digit in the BCD code?

  • 4 bits (correct)
  • 2 bits
  • 3 bits
  • 5 bits
  • What is the main limitation of the 4-bit BCD code?

    <p>It can only represent 16 possible characters</p> Signup and view all the answers

    How was the BCD code extended to represent more characters?

    <p>By using a 6-bit code to represent 64 characters</p> Signup and view all the answers

    What does ASCII stand for?

    <p>American Standard Code for Information Interchange</p> Signup and view all the answers

    How does the ASCII code represent characters compared to the BCD code?

    <p>ASCII assigns a unique pattern of bits to each character, while BCD represents each decimal digit independently</p> Signup and view all the answers

    What is the main advantage of the ASCII code over the BCD code?

    <p>ASCII can represent a wider range of characters, including alphabets, digits, and symbols</p> Signup and view all the answers

    Which of the following is another character encoding standard mentioned in the text?

    <p>EBCDIC</p> Signup and view all the answers

    What is the main purpose of character encoding standards like BCD and ASCII?

    <p>To enable transfer of data between different computers</p> Signup and view all the answers

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